High Commands Chronology Union

Organisation of Union Territorial and Field Commands

Part 1: Introduction to Union Military Organisations

Part 2: Pre-War Organisations, January 1861-April 1861

Part 3: Wartime Organisations, April 1861-June 1865

Part 3a: Northeastern and New England Theatre
Part 3b: Western Territories and Pacific Coast Theatre
Part 3c: Trans-Mississippi, Northwest and Frontier Theatre
Part 3d: Gulf Coast Theatre
Part 3e: Atlantic Coast Theatre
Part 3f: Eastern and Capital Theatre
Part 3g: Western Theatre

Part 4: Post War Organisations, June 1865-December 1865

Part 5: Staff Bureaux

Part 1: Introduction to Union Military Organisations

The Constitution of the United States of America provided that the President should be Commander-in-Chief of the Army, the Navy, the Marines and the Militia of the several States when called into service

The War Department under the Secretary of War conducted the political and administrative oversight of the Army, Navy and the Marines; and all matters pertaining to the conduct of military operations. The Militia of the several States were directed by the Governor. The Secretary of the navy dealt with matters pertaining to the US Navy and US Marines

After the War of Independence, the United States Army appointed no active duty General Officers. Secretaries of War from 1821 designated a General to be in charge of the field forces without formal congressional approval. When General Officers were next properly appointed, the highest authorised rank in the US Army was Major-General, and the senior Major-General on the Army rolls was referred to as the Commanding General of the United States Army, or, less officially, as General-in-Chief. This position was traditional rather than statutory. The position of General-in-Chief was abolished with the creation of the statutory Chief of Staff of the Army in 1903

Territorial Commands

Territorial commands were organised to relate to geographical territories rather than to particular military forces. Military Divisions, Departments and Districts had a primarily administrative function for their specific territory and dealt with military and logistical matters. They provided operational command in response to strategic directions from the War Department and other senior leaders. They did not necessarily direct the tactical operations of forces in the field.

Military Divisions were strategic commands, reporting directly to the President, War Department and General-in-Chief. They were devised to coordinate the action of their subordinate Department commanders at a strategic level.

The Military Division of the Potomac was designated in 1861 but, effectively, this was a Department. The highest-level of territorial command remained the Department until late in 1863. In 1862 the Department of the Mississippi operated as a Military Division with authority over a group of Departments. It was only when the Military Division of the Mississippi was created in October 1863 that strategic command over more than Department was fully applied. More Military Divisions were established late in 1864 and finally, after the end of the war, the entire territory of the United States was assigned as part of a Military Division.

Departments were normally the highest level of territorial command, reporting directly to the President, war department and General-in-Chief. Some Departments were subdivided into one or more Districts and Sub-Districts. Departments covered the entire geographical territory of the United States before the war and were gradually extended across the entire Union and Confederate regions by the end of the war.

In late 1863 some Departments were subordinated to a Military Division and by mid-1865 they were all organised in this way. The size and borders of some Departments and their Districts and Sub-Districts changed in response to local circumstances and command priorities. Some were aligned with state borders but most reflected territories of military operations across or within state and territorial borders. Their nomenclature could be inconsistent, and anomalies occasionally arose over the geographical extent and authority of some Departments.

By April 30 1865, after the end of all significant hostilities, there were four Military Divisions, controlling fourteen subordinate Departments. There were also five autonomous Departments, but by June 1865 all Departments were incorporated into a Military Division.

Districts and Sub-Districts were formed in some Departments. These had specific geographical responsibilities. Some existed for extended periods of time while others functioned only temporarily in response to operational requirements. Many were subject to changes to their territory of responsibility as commanders as circumstances developed.

Field Commands

Military forces were combined in varying sizes and levels of complexity for active operations. The basic building blocks were the infantry regiment and cavalry regiment. These were grouped into brigades and then brigades were grouped into divisions.

Army

In larger forces, a collection of divisions and brigades was termed an Army. Each Army was typically attached to a DEpartment, usually of the same name, for its administratuve support.

Army Corps or Corps

Sometimes Armies were large enough to be  sub-divided into one or more Corps (or Army Corps). Corps were not authorised officially in the Union army until 17th July 1862. However, the term was already in unofficial use prior to this date. Roman numerals are used to designate a Corps following current convention e. g., XVIII Corps but this was not contemporary usage during the Civil War. At that time, they were normally designated by ordinal numbers, for example, Twenty-First Corps or Twelfth Corps.  The orthography of numeral for Brigades, Divisions and Corps is a later convention.

At first, Corps were numbered unofficially to describe large formations within an army;for example, I Corps, II Corps and III Corps were named in the Army of the Potomac, the Army of Virginia, the Army of the Mississippi unofficially, the Army of the Ohio, and the Army of the Cumberland. This resulted in some duplication of the terms for different forces. Some designation, for example IV Corps, were used more than once after the initial force was discontinued and a new one designated using the same numeral. After the official authorisation of Corps commands, Corps designations were regularised and ultimately numbered officially from I Corps to XXV Corps, with a few exceptions and duplications. The term “Provisional Corps” was applied to V Corps and VI Corps in Virginia early in 1862. This caused some duplication of the terms I Corps to VI Corps prior to the authorisation of the organisation. After official authorisation of Corps commands, Corps designations were regularised and ultimately numbered officially and without duplication from I Corps to XXV Corps, with a few exceptions.

Some Corps numbers were discontinued and revived again with similar forces in the same theatre or the term re-assigned to wholly different forces and in a different theatre e. g. IV Corps. Some Corps only ever served within one field army or Department while others e. g. IX Corps were transferred from Department to Department. Some Corps designations referred to field forces that never operated as integrated field commands but were largely administrative commands, overseeing reinforcements, training or garrisons or local forces e. g., VIII Corps, XVI Corps.

Although twenty-five Corps numbers were designated, there were never twenty-five-active Army Corps at one time as some Corps were broken up and reformed for temporary operations. Sometimes the designation of their constituents became confused or anomalous. Several Corps were discontinued and some re-activated or transferred to new Departments. A few Corps remained in existence and comprised substantially similar constituent units from the early years almost until the end of the war e. g., II Corps, VI Corps while others were short-lived. Most Corps were discontinued, merged or significantly reorganised at least once, and some on several occasions. The transfer in and out of brigades or even divisions from Corps was not common, but did happen on occasion. Some Corps designations referred to field forces that never operated as integrated field commands but were largely administrative commands, overseeing reinforcements, training depots, garrisons or local forces e. g., VIII Corps, XVI Corps, XXII Corps.

Wing

The term Wing was used occasionally to describe a group of Corps within an army but, it could also be used for the constituent parts within a particular Corps e. g. XIII Corps and XIV Corps had Left Wing and Right Wing and even Centre within them. It was usual for forces of more than one Union Corps to be termed an Army; but some Armies comprised only one Corps.

Grand Division

The term Grand Division was used in the winter of 1862 to designate groups of Army Corps within the Army of the Potomac. This practice was short-lived and not repeated. Major-General William Tecumseh Sherman commanded several Corps for the Atlanta campaign in 1864 and subsequently, but he retained the name of Army for each grouping of Corps (Army of the Cumberland, the Ohio, the Tennessee, Georgia, etc.). Similarly, in 1864 and 1865, Lieutenant-General Ulysses Simpson Grant retained the integrity of the Army of the Potomac and Army of the James for the Virginia campaign of 1864 and 1865, rather than creating Wings or Grand Divisions.

Divisions

Divisions were created in the first year of the war to group brigades together under one command. They were usually numbered 1st Division, 2nd Division, or 3rd Division within an Army and, later more frequenly numbered within a Corps. For example, 1st Division, III Corps and 2nd Division, III Corps. But the typical orthography at the time was in letters, for example, “Second Brigade, First Division, Third Corps”. Some divisions had a named designation, e. g. Kanawha Division or Coast Division, especially if operating independently. For practicality, many divisions and other commands were designated by their commander’s name, especially for a temporary period. Early in the war some divisions in the western theatre were numbered across the entire Army or Department but it soon became standard practice to number within a Corps. The standard organisation was for a Corps to have three Divisions but almost as many Corps had only two divisions; some Corps were organised with four divisions but they rarely had more than four.

Armies, Corps, and Divisions should nominally be commanded by a Major-General but were sometimes commanded by a Brigadier-General. Brigadier-Generals served in a few cases as staff officers to other Generals or as War Department staff officers. Some even commanded Military Districts or temporarily commanded Military Departments; some served temporarily as commanders of Corps within a field army. The majority commanded divisions or brigades. The term Chief of Staff was not in use, but on both sides a General officer was sometimes appointed as a second-in-command to perform that role.

Brigades

The organisation of regiments into brigades was already authorized at the outbreak of war. Appointment to brigade permanent command in the Confederate Army was usually accompanied by promotion to the commensurate rank of Brigadier-General. It was intended in the Union Army also that brigades of infantry and cavalry should be commanded by a Brigadier-General. Brigadier-Generals were appointed later in the war to command concentrations of artillery and to some senior staff positions. Many Union brigades were indeed commanded by Brigadier-Generals, but brigade command was very often exercised by a Colonel. Rank in the USA and USV offered a degree of differentiation in ranks but the effect of this was far less distinct than in the Confederate Army.

Union practice was not identical to the Confederacy’s use of General grades, and Union Brigadier-Generals led brigades, divisions, or even Corps temporarily.

Brigades were usually numbered within a division or other command e. g. 1st Brigade, 2nd Brigade. Informal practice was to name them after their commander e. g. “Opdycke’s Brigade” but this was usually only for convenience and clarity. Even where they were named they were usually also numbered but usage would alternate. Typical orthography was always to use words, for example, First Brigade, Second Brigade. Sometimes a brigade, especially on detached operations, would have a territorial designation.

Regiments

Within a Brigade, each Regiment was commanded by a Colonel, supported at full strength by a Lieutenant-Colonel and a Major. In the absence of the appointed Brigadier-General, the senior Colonel of the brigade would command the Brigade. The connection between an individual’s grade and his command was less pronounced than in the Confederate army, and it was very common for brigade command to be exercised by a Colonel rather than a Brigadier-General, especially in the cavalry.

Artillery Regiments existed primarily for logistical and administrative purposes; most often, batteries from different regiments were grouped together into battalions, or attached to infantry brigades, divisions, or corps..

Note: The orthography of numerals for Brigades, Divisions and Corps is a recent convention. During the Civil War, Corps were typically designated in words; for example, First Corps or Twenty-Fifth Corps etc. Divisions and Brigade are normally given ordinal numbers within their Division and Corps, e.g. 1st Brigade, 2nd Division, III Corps. This is often abbreviated in current practice to 1/2/III. The orthography of the time was First Brigade Second Division, Third Corps; with a punctilious regard to punctuation.

Commanders of Field Commands

Major-Generals USA served as General-in-Chief, or commanded Military Divisions or Military Departments and major field forces. Major-Generals USV commanded Military Departments, Military Districts, Armies, Corps or, less often, a Division. Major-Generals USV served in a few cases as staff officers to other Generals or as War Department staff officers.

Command of Armies and Army Corps was intended to be exercised by Major-Generals USA, Brigadier-Generals USA or Major-Generals USV, although the temporary or interim command of Army Corps was sometimes exercised by Brigadier-Generals USV.

The Union practice was not synonymous with the Confederacy’s use of the grade, and Union Major-Generals led divisions, corps and armies, whereas the Confederates sought more strictly to assign General ranks to match the size or designation of commands.

Until the first Lieutenant-General USA was appointed in 1864, the most senior grade in the Union Army was Major-General USA.

The majority of the highest Union commanders were Major-Generals USV. Their rank within the grade was determined by seniority since confirmation; however, the grade of Major-General or Brigadier-General in the USA Regular Army was deemed higher than the same grade in the US Volunteers. During the war, it became necessary to promote accomplished officers to General grades in the Regular Army in order that they could command fellow Major-Generals who otherwise had seniority over them in the US Volunteers.

Part 2: Pre-War Organisation, US Army January 1 1861-April 11 1861

Summary

The United States Regular Army was ill-prepared for a war on a continental scale and was organised primarily for operations on the western frontier. There were 198 companies formed into 10 Regiments of Infantry, 4 Regiments of Artillery and 5 Regiments of Cavalry. There were 1,098 Officers and 15,304 Enlisted Men of whom 727 Officers and 13,930 Enlisted Men were present for duty. The majority of field forces were deployed along the western frontier and in the new territories. Garrisons were also located in the primary east coast ports where a new generation of coastal fortifications was under construction. These forts were not fully garrisoned but were held ready for occupation by the State Militia in the event of war with a European power. Of the 198 available companies or batteries, 183 were stationed at 79 different posts west of the Mississippi. The other fifteen companies, mostly artillery, were allocated to coastal fortifications, 23 arsenals and the Canadian border.

Historically, for major campaigns such as the War with Mexico in 1846-1848, the United States had supplemented its Regular Army by recruiting a temporary army of volunteers, called up for service of limited duration. In the coming Civil War, these US Volunteers would, as before, form the backbone of the forces engaged.

Army administration, equipment and supply was handled by a system of bureaux reporting directly to the War Department and not subject to the direct orders of the General-in-Chief. The staff departments covered the following territories of responsibility: Quartermaster-General, Adjutant-General, Inspector-General, Commissary General of Subsistence, Paymaster-General, Surgeon-General, Judge Advocate-General, and later, Provost Marshal General; Engineers, Topographical Engineers (discontinued in 1863), and Ordnance.

The seven Departments at the start of 1861 were modified on January 15 1861 to six by combining the Department of California and the Department of Oregon into a new Department of the Pacific. Oregon was assigned to a new District.

The six military Departments in existence after January 15 1861 reported the following numbers available for duty: East 3,894, West 3,585, Utah 685, Pacific California 3,382, New Mexico 2,624 and Texas 2,258. The Department of the East manned the eastern coast fortifications with 18 artillery companies and one company of engineers but no infantry or cavalry. None were stationed in the vicinity of Washington, DC. The Department of Utah had three companies of dragoons, three companies of artillery and four companies of infantry. Thirteen companies of infantry and two companies of dragoons were in the Department of New Mexico and one regiment of infantry was in the Department of Texas. There were forces also in the Department of California and the Department of Oregon. Of 1,108 Regular Army officers serving as of 1 January 1861, 270 ultimately resigned to join the Confederacy. Only a few hundred out of 15,135 enlisted men left the ranks.

The imminence of war and the vulnerability of the capital region required the creation of the Department of Washington on April 9 1861.

 Department of the East

(January 1 1861-April 11 1861)

John Ellis Wool (January 1 1861-Apri l11 1861)

January 1 1861: The Department of the East included all of the United States east of the Mississippi River. Headquarters were at New York. The Department of the East was commanded by Brigadier-General USA John Ellis Wool.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

 Department of the West

(January 1 1861-April 11 1861)

William Selby Harney (January 1 1861-April 11 1861)

January 1 1861: The Department of the West comprised the country west of the Mississippi River and east of the Rocky Mountains, except for Texas, Utah Territory and New Mexico Territory. It included Missouri, Arkansas, Iowa, Minnesota, Kansas Territory, Nebraska Territory, Indian Territory and Louisiana west of the Mississippi River. Headquarters were at St Louis. The Department of the West was commanded by Brigadier-General USA William Selby Harney

February 28 1861: Colorado Territory was incorporated into the Department of the West.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

Department of Texas

(January 1 1861-April 11 1861)

David Emanuel Twiggs (January 1 1861-February 18 1861), Carlos Adolphus Waite (temporary February 19 1861-April 11 1861)

January 1 1861: The Department of Texas comprised the state of Texas. Headquarters were at San Antonio. The Department of Texas was commanded by Brigadier-General USA David Emanuel Twiggs

February 18 1861: Command of the Department of Texas became vacant following the defection of Brigadier-General David Emanuel Twiggs to the Confederacy.

February 19 1861: Colonel Carlos Adolphus Waite assumed temporary command of the Department of Texas, replacing Brigadier-General David Emanuel Twiggs.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

Department of California

(January 1 1861-January 15 1861, discontinued, to Department of the Pacific)

Benjamin Lloyd Beall (temporary January 1 1861-January 15 1861)

January 1 1861: The Department of California was established. It comprised the country west of the Rocky Mountains south of the Oregon Territory and including the Utah Territory west of the 117 degree of longitude and the New Mexico Territory west of 100 degrees longitude. Headquarters were at San Francisco. The Department of California was commanded temporarily by Lieutenant-Colonel Benjamin Lloyd Beall.

January 15 1861: The Department of California was discontinued, and its territory included in the Department of the Pacific.

Department of Oregon

(January 1 1861-January 15 1861, discontinued, to District of Oregon)

George Wright (January 1 1861-January 15 1861)

January 1 1861: The Department of Oregon comprised the territory of the later states of Washington, Idaho and all but the south-western corner of Oregon. Headquarters were at Vancouver. The Department of Oregon was commanded by Colonel George Wright.

January 15 1861: The Department of Oregon was discontinued, and its territory incorporated into the new District of Oregon in the Department of the Pacific.

Department of Utah

(January 1 1861-April 11 1861)

Philip St George Cooke (January 1 1861-April 11 1861)

January 1 1861: The Department of Utah comprised Utah Territory east of 177 degrees west longitude. Headquarters were at Fort Crittenden. The Department of Utah was commanded by Colonel Philip St George Cooke.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

Department of New Mexico

(January 1 1861–April 11 1861)

Thomas Turner Fauntleroy (January 1 1861-January 21 1861 interim March 21 1861), William Wing Loring (January 22 1861-April 11 1861)

January 1 1861: The Department of New Mexico comprised the Territory of New Mexico east of 110 degrees of longitude and a part of southwest Colorado Territory. Headquarters were at Santa Fe. The Department of New Mexico was commanded by Colonel Thomas Turner Fauntleroy.

January 22 1861: Colonel William Wing Loring was appointed to command the Department of New Mexico, arriving on 22nd March 1861.

March 22 1862: Colonel William Wing Loring arrived to command the Department of New Mexico, succeeding Colonel Thomas Turner Fauntleroy, who defected to the Confederacy.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

Department of the Pacific

(Established January 15 1861-April 11 1861)

Albert Sidney Johnston (January 1 1861-March 22 1861 interim April 11 1861)

January 15 1861: The Department of the Pacific was established, comprising the territory west of the Rocky Mountains except for the part of Utah Territory east of 117 degrees west longitude and except for New Mexico Territory east of 110 degrees west longitude. Colonel Albert Sidney Johnston assumed command of the Department of the Pacific. The District of Oregon was established in the Department of the Pacific, comprising the state of Oregon and Washington Territory except for the territories of the Rogue and Umpqua Rivers.

March 2 1861: Nevada Territory and Dakota Territory were included in the Department of the Pacific.

March 23 1861: Brigadier-General Edwin Vose Sumner was appointed to command the Department of the Pacific, arriving on 25th April 1861.

April 10 1861: Colonel Albert Sidney Johnston resigned as commander of the Department of the Pacific but awaited the arrival of his successor, Brigadier-General Edwin Vose Sumner, before departing.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

District of Oregon

(Established January 15 1861-April 11 1861)

George Wright (January 15 1861-April 11 1861)

January 15 1861: The District of Oregon was established in the Department of the Pacific, comprising the state of Oregon and Washington Territory except for the territories of the Rogue and Umpqua Rivers. Colonel George Wright assumed command of the District of Oregon.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

Department of Washington

(Established April 9 1861-April 11 1861)

Charles Ferguson Smith (April 9 1861-wef April 101 1861-April 11 1861)

April 9 1861: The Department of Washington was established, comprising the original boundaries of the District of Columbia (including Alexandria County, Virginia) and the state of Maryland as far south as Bladensburg, taken from the Department of the East. Lieutenant-Colonel Charles Ferguson Smith was appointed to command the Department of Washington, arriving on 10th April 1861.

April 10 1861: Lieutenant-Colonel Charles Ferguson Smith arrived to command the Department of Washington.

April 12 1861: See Part 1 Wartime organisation, April 12 1861-June 27 1865.

Part 3: Wartime organisation, April 1861-June 1865

Part 3a: Northeastern and New England Theatre

Summary

This theatre broadly covers the states Massachusetts, New Hampshire, Vermont, Maine, Rhode Island, Connecticut, New York, and New Jersey.

The Department of the East initially covered the entire region, but it was rapidly diminished as new territorial commands were established in its former territory (e.g. Departments of Florida, Washington, Annapolis, Pennsylvania, Maryland, the Ohio, Virginia, Northeastern Virginia, Kentucky, the Shenandoah, the Potomac, Western Virginia and New England – and others in the western theatre).

In October 1861 the Department of the East was renamed as the Department of New York, reflecting its reduced scope. It was revived as the Department of the East in January 1863. In the meantime, within this reduced theatre, the Department of New England existed briefly from October 1861 to February 1862, primarily as vehicles for recruiting and organising new military forces.

Department of the East

(From Pre-War organisation, April 12 1861-October 26 1861, discontinued, to Department of New York)

John Ellis Wool (April 12 1861-October 26 1861)

April 12 1861: See Part 2 Pre-War organisation, January 1861-April 11 1861.

April 13 1861: The Department of Florida was established with headquarters at Fort Pickens, comprising the state of Florida transferred from the Department of the East.

April 19 1861: The states of Pennsylvania and Delaware were transferred from the Department of the East to the Department of Washington.

April 27 1861: The Department of Washington was extended to include the District of Columbia, and Maryland as far as Fort Washington and Bladensburg, Maryland, taken from the Department of the East.

May 3 1861: The Department of the Ohio was established, comprising Illinois, Ohio and Indiana transferred from the Department of the East.

May 8 1861: The parts of Pennsylvania and Virginia north of the Kanawha River, north and west of the Greenbrier River and thence on a line northwest to the southwest boundary of Maryland were transferred from the Department of the East to the Department of the Ohio.

May 9 1861: The Department of the Ohio was extended to include the parts of Pennsylvania and Virginia north of the Kanawha River and west of the Greenbrier River, and on a line drawn from the Greenbrier River to the southwest corner of Maryland, then to the Pennsylvania border and to the northeast corner of McKean county, Pennsylvania, to its existing territory of Illinois, Ohio and Indiana. These territories were detached from the Department of the East and the Department of Pennsylvania.

May 22 1861: The Department of Virginia was established with headquarters at Fortress Monroe, comprising the territory of Virginia within sixty miles of Fort Monroe, detached from the Department of the East. It also assumed authority over any territories of North Carolina and South Carolina to be occupied by Union forces.

May 27 1861: The Department of Northeastern Virginia was established, comprising the part of Virginia east of the Allegheny Mountains and north of the James River, and west of the existing Department of Virginia (within sixty miles of Fort Monroe). Its territory was detached from the Department of the East.

May 28 1861: The Department of Kentucky was established, comprising that territory of the state within 100 miles of the Ohio River, detached from the Department of the East.

July 19 1861: The Department of the Shenandoah was established, comprising the Shenandoah Valley of Virginia, taken from the Department of the East. The remainder of Kentucky and the state of Tennessee not already assigned were detached from the Department of the East and assigned to the Department of the Shenandoah.

August 17 1861: Command of the Department of the East became vacant until it was formally discontinued on 26th October 1861.

September 19 1861: The Department of Western Virginia was established, comprising Virginia west of the Blue Ridge Mountains. Its territory was taken from the Department of the East and the Department of the Ohio.

October 1 1861: The Department of New England was established, comprising the states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut detached from the Department of the East.

October 26 1861: The Department of the East was discontinued. The Department of New York was established, with responsibility for remaining authority of the Department of the East with headquarters at Albany.

November 9 1861: The state of Michigan transferred from the discontinued Department from the East to the Department of the Ohio.

Department of New England

(Established, October 1 1861-February 20 1862, discontinued)

Benjamin Franklin Butler (October 1 1861-February 20 1862)

October 1 1861: The Department of New England was established, comprising the states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut, detached from the Department of the East. Headquarters was at Boston, Massachusetts. Major-General Benjamin Franklin Butler was appointed to command the Department of New England, arriving on 6th October 1861.

October 6 1861: Major-General Benjamin Franklin Butler arrived to command the Department of New England.

February 20 1862: The Department of New England was discontinued, and the six states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut reverted to local control.

Department of New York

(Established from Department of the East, October 26 1861-January 3 1863, discontinued, to Department of the East)

Edward Denison Morgan (October 26 1861-December 31 1862)

October 26 1861: The Department of New York was established, with responsibility for the remaining territory of the discontinued Department of the East, with headquarters at Albany. Major-General Edwin Denison Morgan, Governor of New York, assumed command of the Department of New York.

February 1 1862: The state of New Jersey transferred from the Department of New York to the Department of the Potomac. The state of Pennsylvania was incorporated into the Department of the Potomac.

January 1 1863: Command of the Department of New York became vacant.

January 3 1863: The Department of New York was discontinued, and the state of New York transferred to the Department of the East. The Department of the East was established comprising the states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut transferred from local control, and New York taken from the discontinued Department of New York.

Department of the East

(From Department of New York, January 3 1863-June 27 1865, transferred to Military Division of the Atlantic)

John Ellis Wool (January 12 1863-July 17 1863, John Adams Dix (July 18 1863-April 9 1865), John James Peck temporary April 10 1865-April 18 1865), John Adams Dix (April 19 1865-June 27 1865)

January 3 1863: The Department of New York was discontinued, and the state of New York transferred to the Department of the East. The Department of the East was established comprising the states of Maine, New Hampshire, Vermont, Massachusetts, Rhode Island and Connecticut transferred from local control and New York taken from the discontinued Department of New York. Major-General John Ellis Wool was appointed to command Department of the East, arriving on 12th January 1863.

January 12 1863: Major-General John Ellis Wool arrived to command the Department of the East.

February 6 1863: The state of New Jersey transferred from the Middle Department to the Department of the East.

July 18 1863: Major-General John Adams Dix assumed command of the Department of the East, succeeding Major-General John Ellis Wool.

September 14 1864: The District of Northern New York was established in the Department of the East, comprising Albany, Sacket’s Harbor, Ogdensburg and Champlain, New York.

April 10 1865: Major-General John James Peck assumed temporary command of the Department of the East, succeeding Major-General John Adams Dix.

April 19 1865: Major-General John Adams Dix assumed command of the Department of the East, succeeding Major-General John James Peck.

June 27 1865: The Military Division of the Atlantic was established. It included the Department of the East, the Department of Virginia, the Department of North Carolina, the Department of South Carolina, and the Middle Department. The Department of the East transferred to the Military Division of the Atlantic. The District of Northern New York was discontinued.

District of Northern New York

(Established, September 14 1864-June 27 1865, discontinued)

John Cleveland Robinson (September 14 1864-June 27 1865)

September 14 1864: The District of Northern New York was established in the Department of the East, comprising Albany, Sacket’s Harbor, Ogdensburg and Champlain, New York. Brigadier-General John Cleveland Robinson assumed command of the District of Northern New York.

June 27 1865: The District of Northern New York was discontinued.

Part 3b: Western Territories and Pacific Coast Theatre

Summary

This theatre broadly covers the state of California, and the Arizona Territory, Colorado Territory, Dakota Territory, Nevada Territory, New Mexico Territory, Oregon Territory, Utah Territory, and adjacent operational regions.

At the outbreak of war, the Department of Utah, Department of New Mexico and the Department of the Pacific were responsible for the area.

In July 1861, the Department of Utah was discontinued, and its territory brought under the Department of the Pacific. Utah transferred to the Department of the Missouri in February 1865 and was never again constituted as a military Department.

The Department of New Mexico was also discontinued in July 1861 and its territory transferred briefly to the Western Department. The Western Department proved to be torn between its westward and eastward facing responsibilities, so the Department of New Mexico was re-established in November 1861, after the dissolution of the Western Department.

The Department of the Pacific and the revived Department of New Mexico, and their Districts, shared military authority in the Far Western theatre. The District of Colorado was attached only as an administrative convenience from September to October 1862 during the recreation of the Department of the Missouri.

Both the Department of the Pacific and the Department of New Mexico were discontinued in the general post-war reorganisation of June 27 1865. The territory of the former was divided into the Department of California and the Department of the Columbia, and the territory of the latter was divided between the Department of the Pacific and the Department of the Missouri.

Department of Utah

(From Pre-War organisation, April 12 1861-July 17 1861, to Department of the Pacific)

Philip St George Cooke (April 12 1861-July 17 1861)

April 12 1861: Colonel Philip St George Cooke retained command of the Department of Utah

July 17 1861: The Department of Utah was discontinued, and its territory incorporated into the Department of the Pacific.

Department of New Mexico

(From Pre-War organisation, April 12 1861–July 3 1861, discontinued, to Western Department)

William Wing Loring (April 12 1861-April 30 1861), Edward Richard Sprigg Canby (temporary May 14 1861-June 10 1861, June 11 1861-July 3 1861)

April 12 1861: Colonel William Wing Loring retained command of the Department of New Mexico.

May 1 1861: Command of the Department of New Mexico became vacant after Colonel William Wing Loring resigned to join the Confederacy.

May 14 1861: Colonel Edward Richard Sprigg Canby assumed temporary command of the Department of New Mexico, succeeding Colonel William Wing Loring.

June 11 1861: Colonel Edward Richard Sprigg Canby was appointed to full command of the Department of New Mexico, arriving on 23rd June 1861.

June 23 1861: Colonel Edward Richard Sprigg Canby assumed full command of the Department of New Mexico.

July 3 1861: The Department of New Mexico was discontinued, and its territory incorporated into the Western Department.

Department of the Pacific

(From Pre-War organisation, April 12 1861-June 27 1865, to Department of California and Department of the Columbia)

Albert Sidney Johnston (interim April 12 1861-April 24 1861), Edwin Vose Sumner (April 25 1861-October 19 1861), George Wright (temporary October 20 1861-November 1861, November 19 1861-May 20 1864), Irvin McDowell (May 25-1864-June 27 1865)

April 12 1861: Colonel Albert Sidney Johnston retained interim command of the Department of the Pacific.

April 25 1861: Brigadier-General Edwin Vose Sumner arrived to command the Department of the Pacific.

July 17 1861: The Department of Utah was discontinued, and its territory incorporated into the Department of the Pacific.

September 14 18161: The District of Southern California was established in the Department of the Pacific, comprising California from San Francisco southwards.

October 20 1861: Brigadier-General George Wright was appointed to temporary command of the Department of the Pacific, arriving on 26th October 1861, to succeed Brigadier-General Edwin Vose Sumner after his transfer to Virginia.

October 26 1861: Brigadier-General George Wright arrived in temporary command of the Department of the Pacific, succeeding Brigadier-General Edwin Vose Sumner who transferred to Virginia.

November 19 1861: Brigadier-General George Wright assumed full command of the Department of the Pacific after a period in temporary command.

December 12 1861: The District of the Humboldt was established in the Department of the Pacific, comprising Sonoma, Napa, Mendocino, Trinity, Humboldt, Klamath and Del Norte counties in California.

August 6 1862: The District of Utah was established in the Department of the Pacific, comprising Utah Territory and Utah Territory.

March 4 1863: The territory of Idaho Territory was added to the District of Oregon.

August 20 1863: Soda Springs, Idaho Territory, transferred to the District of Utah.

May 21 1864: Major-General Irvin McDowell assumed command of the Department of the Pacific, succeeding Brigadier-General George Wright.

August 20 1863: Soda Springs, Idaho Territory, transferred to the District of Utah.

July 1 1864: The District of California was established in the Department of the Pacific, comprising the state of California.

January 20 1865: The Arizona Territory transferred from Department of New Mexico to the Department of the Pacific.

February 17 1865: The District of Utah transferred from the Department of the Pacific to the Department of the Missouri. It comprised Utah Territory and the state of Nevada, and Soda Springs, Idaho Territory.

March 7 1865: The District of Arizona was established in the Department of the Pacific, to comprise the Arizona Territory.

March 14 1865: The District of Oregon was extended to include the entire state of Oregon, including the Rogue and Umpqua River areas. The District of Arizona transferred from the Department of the Pacific to the Department of California.

June 27 1865: June 27 1865: The Military Division of the Pacific was established. It included the Department of California and the Department of the Columbia. The new Department of California included California, Nevada, the Arizona Territory, and the New Mexico Territory from the Department of the Pacific. The Department of the Columbia included Oregon, Washington Territory and Idaho Territory from the Department of the Pacific. The District of Arizona transferred from the Department of the Pacific to the Department of California. The District of the Humboldt was discontinued. The District of Oregon was discontinued. The District of California was discontinued. The District of Southern California was discontinued.

District of Oregon

(From Pre-War organisation, April 12 1861-June 27 1865, discontinued)

George Wright (April 12 1861-September 12 1861), Benjamin Lloyd Beall (temporary September 13 1861-May 4 1862), Albemarle Cady (May 5 1862-July 8 1862), Julius Steinburger (temporary May 5 1862-July 8 1862), Benjamin Alvord (July 9 1862-March 22 1865), Reuben F Maury (temporary March 23 1865-June 27 1865)

April 12 1861: Colonel George Wright retained command of the District of Oregon.

September 13 1861: Lieutenant-Colonel Benjamin Lloyd Beall assumed temporary command of the District of Oregon, succeeding Colonel George Wright.

October 23 1861: Lieutenant-Colonel Albemarle Cady assumed command of the District of Oregon, succeeding Colonel Benjamin Lloyd Beall.

May 5 1862: Colonel Justus Steinburger assumed temporary command of the District of Oregon, succeeding Lieutenant-Colonel Albemarle Cady.

July 9 1862: Brigadier-General USV Benjamin Alvord assumed command of the District of Oregon, succeeding Colonel Justus Steinburger.

March 4 1863: The territory of Idaho Territory was added to the District of Oregon.

August 20 1863: Soda Springs, Idaho Territory, transferred to the District of Utah.

March 14 1865: The District of Oregon was extended to include the entire state of Oregon, including the Rogue and Umpqua River areas.

March 23 1865: Lieutenant-Colonel Reuben F Maury assumed temporary command of the District of Oregon, succeeding Brigadier-General Benjamin Alvord.

June 27 1865: The District of Oregon was discontinued.

District of Southern California

(Established, September 14 1861-June 27 1865, discontinued)

George Wright (September 14 1861-October 13 1861), James Henry Carleton (October 14 1861-January 11 1862), Joseph Rodman West (temporary January 12 1862-February 4 1862), James Henry Carleton (February 5 1862-May 14 1862), George Washington Bowie (temporary May 15 1862-February 6 1863), Harvey Lee (temporary February 7 1863-April 9 1863), Ferris Foreman (temporary April 10 1863-July 6 1863), James Freeman Curtis (July 7 1863-June 27 1865).

September 14 1861: The District of Southern California was established in the Department of the Pacific, comprising California from San Francisco southwards. Colonel George Wright was appointed to command the District of Southern California, arriving on 4th October 1861.

October 4 1861: Brigadier-General George Wright arrived to command the District of Southern California.

October 14 1861: Colonel James Henry Carleton assumed command of the District of Southern California, succeeding Colonel George Wright who took temporary command of the Department of the Pacific.

January 12 1862: Lieutenant-Colonel Joseph Rodman West assumed temporary command of the District of Southern California, succeeding Colonel James Henry Carleton.

February 5 1862: Colonel James Henry Carleton assumed command the District of Southern California, succeeding Lieutenant-Colonel Joseph Rodman West.

May 15 1862: Colonel George Washington Bowie assumed command of the District of Southern California, succeeding Brigadier-General James Henry Carleton.

February 7 1863: Lieutenant-Colonel Harvey Lee assumed temporary command of the District of Southern California, succeeding Colonel George Washington Bowie.

April 10 1863: Colonel Ferris Foreman assumed temporary command of the District of Southern California, succeeding Lieutenant-Colonel Harvey Lee.

July 7 1863: Lieutenant Colonel James Freeman Curtis assumed command of the District of Southern California, succeeding Colonel Ferris Foreman.

June 27 1865: The District of Southern California was discontinued.

District of the Humboldt

(Established, December 12 1861-June 27 1865, discontinued)

Francis James Lippitt (December 12 1861-July 12 1863), Stephen Girard Whipple (July 13 1863-February 7 1864), Henry M Black (February 8 1864-June 30 1864), Stephen Girard Whipple (July 1 1864-June 27 1865)

December 12 1861: The District of the Humboldt was established in the Department of the Pacific, comprising Sonoma, Napa, Mendocino, Trinity, Humboldt, Klamath and Del Norte counties in California. Colonel Francis James Lippitt assumed command of the District of the Humboldt.

July 13 1863: Lieutenant-Colonel USV Stephen Girard Whipple assumed command of the District of the Humboldt, succeeding Colonel Francis James Lippitt.

February 8 1864: Colonel Henry M Black assumed command of the District of the Humboldt, succeeding Lieutenant-Colonel Stephen Girard Whipple.

July 1 1864: Lieutenant-Colonel Stephen Girard Whipple assumed command of the District of the Humboldt, succeeding Colonel Henry M Black.

June 27 1865: The District of the Humboldt was discontinued.

District of Utah

(Established, August 6 1862-February 17 1865, transferred to Department of the Missouri)

Patrick Edward Connor (August 6 1862-February 17 1865)

August 6 1862: The District of Utah was established in the Department of the Pacific, comprising Utah Territory and Utah Territory. Colonel Patrick Edward Connor assumed command of the District of Utah.

August 20 1863: Soda Springs, Idaho Territory, transferred to the District of Utah.

February 17 1865: The District of Utah transferred from the Department of the Pacific to the Department of the Missouri. It comprised Utah Territory and the state of Nevada, and Soda Springs, Idaho Territory.

District of California

(Established, July 1 1864-June 27 1865, discontinued)

George Wright (July 1 1864-June 27 1865)

July 1 1864: The District of California was established in the Department of the Pacific, comprising the state of California. Brigadier-General George Wright assumed command of the District of California.

June 27 1865: The District of California was discontinued.

District of Arizona

(Established, March 7 1865-June 27 1865, transferred to Department of California)

John Sanford Mason (March 7 1865-June 27 1865)

March 7 1865: The District of Arizona was established in the Department of the Pacific, to comprise the Arizona Territory. Brigadier-General John Sanford Mason assumed command of the District of Arizona.

June 27 1865: The District of Arizona transferred from the Department of the Pacific to the Department of California.

Department of New Mexico

(Established, November 9 1861-June 27 1865, discontinued, to Department of the Pacific and Department of the Missouri)

Edward Richard Sprigg Canby (November 9 1861-August 25 1862, interim August 26 1862-September 17 1862), James Henry Carleton (August 26 1862-June 27 1865)

November 9 1861: The Department of New Mexico was established, comprising New Mexico Territory from the Western Department. Colonel Edward Richard Sprigg Canby assumed command of the Department of New Mexico. The Southern District of New Mexico transferred from the Western Department to the Department of New Mexico.

February 14 1862: Fort Garland in the Colorado territory transferred from the Department of Kansas to the Department of New Mexico.

April 16 1862: The Southern District of New Mexico was discontinued in the Department of New Mexico. The Central and Northern District of New Mexico was established in the Department of New Mexico, comprising the territory north of Albuquerque, New Mexico.

June 16 1862: The Central and Northern District of New Mexico was discontinued.

August 26 1862: Brigadier-General James Henry Carleton was appointed to command the Department of New Mexico, arriving on 18th September 1862, to succeed Brigadier-General Edward Richard Sprigg Canby.

August 30 1862: The District of Arizona was established in the Department of New Mexico, comprising the Arizona Territory.

September 18 1862: Brigadier-General James Henry Carleton arrived to command the Department of New Mexico, succeeding Brigadier-General Edward Richard Sprigg Canby.

December 8 1864: The District of Arizona was discontinued.

June 27 1865: Fort Garland, Arkansas, transferred from the Department of New Mexico to the Department of the Missouri. June 27 1865: The Department of New Mexico was discontinued, and its territory transferred to the new Department of California and the Department of the Missouri.

Southern District of New Mexico

(Transferred from Western Department, November 9 1861-April 16 1862, discontinued, to Central and Northern District of New Mexico)

Benjamin Stone Roberts (November 9 1861-April 16 1862)

November 9 1861: The Southern District of New Mexico transferred from the Western Department to the Department of New Mexico. Major Benjamin Stone Roberts retained command of the Southern District of New Mexico in the Department of New Mexico.

April 16 1862: The Southern District of New Mexico was discontinued in the Department of New Mexico.

Central and Northern District of New Mexico

(Established, from Southern District of New Mexico, April 16 1862-June 16 1862, discontinued)

Benjamin Stone Roberts (April 16 1862-June 16 1862)

April 16 1862: The Central and Northern District of New Mexico was established in the Department of New Mexico, comprising the territory north of Albuquerque, New Mexico. Colonel Benjamin Stone Roberts assumed command of the Central and Northern District of New Mexico.

June 16 1862: The Central and Northern District of New Mexico was discontinued.

District of Arizona

(Established, August 30 1862-December 8 1864, discontinued)

James Henry Carleton (August 30 1862-September 4 1862), Joseph Rodman West (September 5 1862-January 28 1864), George Washington Bowie (January 29 1864-November 29 1864), Joseph Rodman West (November 30 1864-December 8 1864)

August 30 1862: The District of Arizona was established in the Department of New Mexico, comprising the Arizona Territory. Brigadier-General James Henry Carleton assumed command of the District of Arizona.

September 5 1862: Colonel Joseph Rodman West assumed command of the District of Arizona, succeeding Brigadier-General James Henry Carleton.

January 29 1864: Colonel George Washington Bowie assumed command of the District of Arizona, succeeding Brigadier-General Joseph Rodman West.

November 30 1864: Brigadier-General Joseph Rodman West assumed command of the District of Arizona, succeeding Colonel George Washington Bowie.

December 8 1864: The District of Arizona was discontinued.

District of Colorado

(Established, September 19 1862-October 11 1862, transferred to Department of the Missouri)

John Milton Chivington (September 19 1862-October 11 1862)

September 19 1862: The District of Colorado was established as an independent command reporting to the War Department, comprising the territory of the Colorado Territory taken from the discontinued Department of Kansas. Colonel John Milton Chivington assumed command of the District of Colorado.

October 11 1862: The District of Colorado (apart from Fort Garland) transferred to the Department of the Missouri.

Part 3c: Trans-Mississippi, Northwest and Frontier Theatre

Summary

This theatre broadly covers the states of Arkansas, Iowa, Kansas, Missouri, Wisconsin, Minnesota, Nebraska, Indian Territory and adjacent operational regions.

Most of the region between the Mississippi River and the Rocky Mountains had been under the control of the Department of the West. In July 1861, this was renamed as the Western Department and underwent political and military turmoil while the pro-Southern commander, Brigadier-General William Selby Harney, was supplanted. In the short term, Nathaniel Lyon provided bold leadership, but he was soon transferred to the prominent figurehead John Charles Frémont. By November, it was clear that Frémont was ineffective, if not incompetent, and he was replaced by David Hunter in November 1861. During this time, the Department had absorbed the former Department of New Mexico to the west, giving it a confusing eastward and westward facing responsibility.

More importantly, from its headquarters at St Louis, Missouri, the Western Department also attended to the strategically vital region around the confluence of the Missouri, Mississippi and Ohio Rivers. Almost immediately, the unwieldy and disparate command was rationalised in response to that urgent strategic priority and Major-General Henry Wager Halleck took control. The newly created Department of the Missouri reflected Halleck’s attention on the great rivers from November 1861 until September 1862. While operations continued west of the Mississippi, requiring the creation of numerous Districts, the more decisive actions occurred east of and along the Mississippi, and along the Tennessee River. Straddling two theatres and laying the foundations for subsequent operations between the Mississippi and the Appalachians, the evolution of the Department of Missouri is continued temporarily in Part 3g, the Western Theatre as part of the gigantic Department of the Mississippi, the equivalent of a Military Division, created under Halleck in March 1862.

Kansas became a District of the Department of the Mississippi from March to May 1862 but soon regained its autonomy as the priorities along the frontier evidently diverged from the more conventional actions along and east of the Mississippi. Hunter led the Department until March 1862, when James Gilpatrick Blunt took over the District and then the revived Department. Blunt commanded until the next major reorganisation in September 1862, when the Department of the Missouri regained its earlier focus west of the Mississippi.

In September 1862, the Department of the Missouri was a reorganised and Department of the Northwest created to manage operations in the Trans-Mississippi, Northwest and Frontier Theatre. Relevant territories were detached from the discontinued Department (Military Division) of the Mississippi and Department of Kansas was discontinued, enabling a more coherent approach to command in the theatre. The Department of the Northwest – led almost continually by Pope -dealt primarily with actions against Native Americans. The Department of the Missouri primarily prosecuted operations against the Confederates and their supporters west of the Mississippi under Curtis, Schofield, and then Rosecrans.

The Department of the Missouri and Department of the Northwest remained the primary commands in the region until January 1864 when the southward advance through Confederate territory necessitated a further reorganisation. The Department of Kansas was recreated to attend to the frontier regions and a new Department of Arkansas was added to manage operations against Confederate-held territory.

As the Union advance against the Confederacy was pressed increasingly into the Trans-Mississippi region from Louisiana, the Department of the Missouri and the Department of Kansas were transferred to a new Military Division of West Mississippi (Trans-Mississippi Military Division). This achieved coordination of effort against the Confederates west of the Mississippi. The Department of Kansas and Department of the Northwest continued with their operations aligned towards Native American affairs and against unconventional pro-Confederate forces.

By January 1865, the Confederate were incapable of extensive operations west of the Mississippi and Union attention returned to the Gulf Coast and east of the Mississippi. When the Military Division of West Mississippi (Trans-Mississippi Military Division) was disbanded the Department of the Missouri and the Department of the Northwest were transferred to their own Military Division of the Missouri, with the Department of Kansas again being discontinued, and taken over by the Department of the Missouri. The Department of Arkansas was connected more to operations by the Military Divisions that managed the Gulf Coast states from Texas to Alabama and so it only joined the Military Division of the Missouri from March to May 1865.

The post-war reorganisation of June 1865 reinstated an approximation of the responsibilities of the pre-war Department of the West. The reformed Military Division of the Mississippi combined the Department of the Missouri and the Department of Arkansas, now joined by a reorganised Department of the Ohio which took over much of the discontinued Department of the Northwest.

Department of the West

(From Pre-War organisation, April 12 1861-July 3 1861, discontinued, to Western Department)

William Selby Harney (April 12 1861-April 22 1861), Nathaniel Lyon (temporary de facto April 22 1861-April 28 1861), Edmund Brooke Alexander (temporary April 29 1861-May 10 1861), William Selby Harney (May 11 1861-May 30 1861), Nathaniel Lyon (May 31 1861-July 3 1861)

April 12 1861: Brigadier-General USA William Selby Harney retained command of the Department of the West.

February 28 1861: Colorado Territory was incorporated into the Department of the West.

April 23 1861: Captain Nathaniel Lyon assumed temporary de facto command of the Department of the West.

April 29 1861: Colonel Edmund Brooke Alexander assumed temporary command of the Department of the West, succeeding Captain Nathaniel Lyon.

May 11 1861: Brigadier-General William Selby Harney assumed command of the Department of the West.

May 31 1861: Brigadier-General Nathaniel Lyon assumed command of the Department of the West, succeeding Brigadier-General William Selby Harney.

June 6 1861: The state of Missouri transferred from the Department of the West to the Department of the Ohio.

July 2 1861: The Army of the West was established in the Department of the West.

July 3 1861: The Department of the West was discontinued, and incorporated into the Western Department.

Army of the West

(Established, July 2 1861-July 3 1861, transferred to Western Department)

Nathaniel Lyon (July 2 1861-July 3 1861)

July 2 1861: The Army of the West was established in the Department of the West. Brigadier-General Nathaniel Lyon assumed command of the Army of the West.

July 3 1861: The Army of the West transferred from the Department of the West to the Western Department.

Western Department

(Established, from Department of the West, July 3 1861-November 9 1861, discontinued, to Department of the Missouri)

Nathaniel Lyon (interim July 3 1861-July 24 1861, John Charles Frémont (July 25 1861-November 1 1861), David Hunter (November 2 1861-November 9 1861)

July 3 1861: The Department of the West was discontinued, and incorporated into the Western Department. The Western Department was established, with headquarters at St Louis, Missouri, comprising Arkansas, Iowa, Minnesota, Kansas, Nebraska Territory, Colorado Territory, Dakota Territory and Indian Territory from the discontinued Department of the West; Missouri and Illinois were taken from the Department of the Ohio; New Mexico Territory was taken from the discontinued Department of New Mexico. Missouri and Illinois were transferred from the Department of the Ohio to the Western Department. The Department of New Mexico was discontinued, and its territory incorporated into the Western Department. The Army of the West transferred from the Department of the West to the Western Department. Major-General John Charles Frémont was appointed to command the Western Department, arriving on 25th July 1861. Brigadier-General Nathaniel Lyon retained interim command of the Western Department.

July 5 1861: The states of Missouri and Illinois were transferred from the Department of the Ohio to the Western Department. The District of Ironton was established in the Western Department, comprising the territory around Ironton, Missouri.

July 25 1861: Major-General John Charles Frémont arrived to command the Western Department, succeeding Brigadier-General Nathaniel Lyon.

July 29 1861: The District of North Missouri was established in the Western Department, comprising the territory of Hannibal, Mexico, Warrenton and Renick, Missouri.

August 8 1 1861: The Southern District of New Mexico was established in the Western Department, comprising all the New Mexico Territory south of Albuquerque.

August 10 1861: The Army of the West was discontinued.

August 15 1861: Western Kentucky transferred from the discontinued Department of Kentucky to the Western Department.

September 1 1861: The District of Ironton was discontinued. The District of Southeast Missouri was established in the Western Department, comprising Bird’s Point, Missouri and Cairo and Mound City, Illinois.

September 8 1861: The District of Western Kentucky was established in the Western Department.

September 24 1861: The Western Army was established in the Western Department.

October 24 1861: Major-General David Hunter was appointed conditionally to command the Western Department, with discretionary orders to relieve the incumbent Major-General John Charles Frémont. The Western Army was discontinued.

November 2 1861: Major-General David Hunter assumed command of the Western Department, succeeding Major-General John Charles Frémont.

November 9 1861: The Western Department was discontinued, and its territory transferred to the Department of New Mexico, the Department of the Missouri and the Department of Kansas. The Department of Kansas was established, with headquarters at Fort Leavenworth, comprising Kansas, Nebraska Territory, Colorado Territory, Dakota Territory and the Indian Territory, taken from the Western Department. The Department of New Mexico was established, comprising New Mexico Territory from the Western Department. The Department of the Missouri was established, comprising Missouri, Iowa, Minnesota, Wisconsin, Illinois and Arkansas from the Western Department, the Department of the East and Kentucky west of the Cumberland River from the Department of the Cumberland. The Department of the Ohio was adjusted to comprise Ohio, Michigan, Indiana and the parts of Kentucky east of the Cumberland River, with headquarters at Louisville, Kentucky. The District of North Missouri was discontinued. The District of Southeast Missouri transferred from the Western Department to the Department of the Missouri, comprising the vicinity of Cairo, Illinois, and Ironton, Jefferson City and Cape Girardeau, Missouri. The District of Western Kentucky transferred from the Western Department to the Department of the Missouri. The Southern District of New Mexico transferred from the Western Department to the Department of New Mexico.

District of Ironton

(Established, July 5 1861-September 1 1861, discontinued, to District of Southeast Missouri)

Benjamin Gratz Brown (July 5 1861-August 7 1861), Ulysses Simpson Grant (August 8 1861-August 14 1861), Benjamin Mayberry Prentiss (August 15 1861-September 1 1861)

July 5 1861: The District of Ironton was established in the Western Department, comprising the territory around Ironton, Missouri. Colonel Benjamin Gratz Brown assumed command of the District of Ironton.

August 8 1861: Brigadier-General Ulysses Simpson Grant assumed command of the District of Ironton, succeeding Colonel Benjamin Gratz Brown.

August 15 1861: Brigadier-General Benjamin Mayberry Prentiss assumed command of the District of Ironton, succeeding Brigadier-General Ulysses Simpson Grant.

September 1 1861: The District of Ironton was discontinued.

District of North Missouri

(Established, July 29 1861-November 9 1861, discontinued)

John Pope (July 29 1861-November 9 1861)

July 29 1861: The District of North Missouri was established in the Western Department, comprising the territory of Hannibal, Mexico, Warrenton and Renick, Missouri. Brigadier-General John Pope assumed command of the District of North Missouri.

November 9 1861: The District of North Missouri was discontinued.

Southern District of New Mexico

(Established, August 8 1861-November 9 1861, transferred to Department of New Mexico)

Benjamin Stone Roberts (August 8 1861-November 9 1861)

August 8 1861: The Southern District of New Mexico was established in the Western Department, comprising all the New Mexico Territory south of Albuquerque. Major Benjamin Stone Roberts assumed command of the Southern District of New Mexico.

November 9 1861: The Southern District of New Mexico transferred from the Western Department to the Department of New Mexico.

District of Southeast Missouri

(Established, from District of Ironton, September 1 1861-November 9 1861, transferred to Department of the Missouri)

Ulysses Simpson Grant (September 1 1861-November 9 1861)

September 1 1861: The District of Southeast Missouri was established in the Western Department, comprising Bird’s Point, Missouri and Cairo and Mound City, Illinois. Brigadier-General Ulysses Simpson Grant assumed command of the District of Southeast Missouri.

November 9 1861: The District of Southeast Missouri transferred from the Western Department to the Department of the Missouri, comprising the vicinity of Cairo, Illinois, and Ironton, Jefferson City and Cape Girardeau, Missouri.

District of Western Kentucky

(Established, September 8 1861-November 9 1861, transferred to Department of the Missouri)

Charles Ferguson Smith (September 8 1861-November 9 1861)

September 8 1861: The District of Western Kentucky was established in the Western Department. Brigadier-General Charles Ferguson Smith assumed command of the District of Western Kentucky.

November 9 1861: The District of Western Kentucky transferred from the Western Department to the Department of the Missouri.

Army of the West

(Transferred from Department of the West, July 3 1861-August 10 1861, discontinued)

Nathaniel Lyon (July 3 1861-August 10 1861)

July 3 1861: The Army of the West transferred from the Department of the West to the Western Department. Brigadier-General Nathaniel Lyon retained command of the Army of the West.

August 10 1861: The Army of the West was discontinued.

Western Army

(Established, September 24 1861-October 24 1861, discontinued)

John Charles Frémont (September 24 1861-October 24 1861)

September 24 1861: The Western Army was established in the Western Department. Major-General John Charles Frémont assumed command of the Western Army.

October 24 1861: The Western Army was discontinued.

Department of Kansas

(Established, November 9 1861-March 11 1862, to District of Kansas in the Department (Military Division of the Mississippi)

David Hunter (November 9 1861-March 11 1862)

November 9 1861: The Department of Kansas was established, with headquarters at Fort Leavenworth, comprising Kansas, Nebraska Territory, Colorado Territory, Dakota Territory and the Indian Territory, taken from the Western Department. Major-General David Hunter was appointed to command the Department of Kansas, arriving on 20th November 1861.

November 20 1861: Major-General David Hunter arrived to command the Department of Kansas.

February 14 1862: Fort Garland in the Colorado territory transferred from the Department of Kansas to the Department of New Mexico.

March 11 1862: The Department of Kansas was renamed the District of Kansas and transferred to the Department (Military Division) of the Mississippi.

District of Kansas

(From Department (Military Division) of the Mississippi, May 2 1862-September 19 1862, discontinued, to Department of the Missouri)

James Gilpatrick Blunt (May 2 1862-September 19 1862)

May 2 1862: The District of Kansas was discontinued in the Department (Military Division) of the Mississippi and reverted to become the Department of Kansas. The Department of Kansas was established and detached from the Department (Military Division) of the Mississippi, comprising Kansas, Dakota Territory, Nebraska Territory, Indian Territory and Colorado Territory (except for Fort Garland). Brigadier-General James Gilpatrick Blunt was appointed to command the Department of Kansas, arriving on 5 May 1862.

May 5 1862: Brigadier-General James Gilpatrick Blunt arrived to command the Department of Kansas.

August 16 1862: The Army of Kansas was established in the Department of Kansas.

September 6 1862: The Department of the Northwest was established, comprising the states of Wisconsin, Iowa and Minnesota, and Nebraska Territory and Dakota Territory. The Dakota Territory and Nebraska Territory were transferred from the Department of Kansas to the Department of the Northwest.

September 19 1862: The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri. Kansas and Indian Territory were transferred from the Department of Kansas to the Department of the Missouri. The Army of Kansas was discontinued. The District of Colorado was established as an independent command reporting to the War Department, comprising the territory of the Colorado Territory taken from the discontinued Department of Kansas.

Army of Kansas

(Established, August 16 1862-September 19 1862, discontinued)

James Gilpatrick Blunt (August 16 1862-September 19 1862)

August 16 1862: The Army of Kansas was established in the Department of Kansas. Brigadier-General James Gilpatrick Blunt assumed command of the Army of Kansas.

September 19 1862: The Army of Kansas was discontinued.

Department of the Northwest

(Established, September 6 1862-January 30 1865, transferred to Military Division of the Missouri)

John Pope (September 6 1862-November 27 1862), Washington Lafayette Elliott (temporary September 28 1862-February 12 1863 interim to February 27 1863), John Pope (February 13 1863-January 30 1865)

September 6 1862: The Department of the Northwest was established, comprising the states of Wisconsin, Iowa and Minnesota, and Nebraska Territory and Dakota Territory. Headquarters were at Madison, and later at Milwaukee, Wisconsin. The states of Minnesota and Iowa were detached from the Department (Military Division) of the Mississippi. Wisconsin was taken from the Department of the Ohio. Dakota Territory and Nebraska Territory were transferred from the Department of Kansas to the Department of the Northwest. Major-General John Pope was appointed to command of the Department of the Northwest, arriving on September 16th 1862. The District of Wisconsin was established in the Department of the Northwest, comprising the state of Wisconsin.

September 16 1862: Major-General John Pope arrived to command of the Department of the Northwest.

November 17 1862: The Department of the Northwest was divided into the First District, Second District, Third District and Fourth District. The First District of the Department of the Northwest was established. It comprised Iowa and the Dakota Territory. The Second District of the Department of the Northwest was established. It comprised the vicinity of Fort Snelling, Minnesota. The Third District of the Department of the Northwest was established. It comprised the vicinity of Fort Ripley, Minnesota. The Fourth District of the Department of the Northwest was established. It comprised the vicinity of Fort Abercrombie, Minnesota.

November 23 1862: The Second District of the Department of the Northwest was discontinued, and renamed the District of Minnesota. The District of Minnesota was established in the Department of the Northwest, from Second District, Third District and Fourth District of the Department of the Northwest including Fort Snelling, Fort Ridgely, and Fort Abercrombie.

November 27 1862: The Third District of the Department of the Northwest was discontinued. The Fourth District of the Department of the Northwest was discontinued.

November 28 1862: Brigadier-General Washington Lafayette Elliott assumed temporary command of the Department of the Northwest, succeeding Major-General John Pope.

February 13 1863: Major-General John Pope assumed command the Department of the Northwest, arriving on 28th February 1863, to succeed Brigadier-General Washington Lafayette Elliott.

February 28 1863: Major-General John Pope arrived to resume command of the Department of the Northwest, succeeding Brigadier-General Washington Lafayette Elliott.

June 1 1863: The District of Dakota was established in the Department of the Northwest, comprising the Dakota Territory. The First District of the Department of the Northwest was discontinued.

June 8 1863: The District of Iowa was established in the Department of the Northwest, comprising the state of Iowa.

December 4 1863: The District of Dakota was discontinued, and its territory incorporated into the District of Iowa.

May 26 1864: Montana Territory was attached to the Department of the Northwest.

November 12 1864: The District of Iowa was discontinued.

January 30 1865: The Military Division of the Missouri was established. It included the Department of the Northwest and the Department of the Missouri. The Department of the Northwest transferred to the Military Division of the Missouri. The District of Minnesota transferred with the Department of the Northwest to the Military Division of the Missouri. The District of Wisconsin transferred with the Department of the Northwest to the Military Division of the Missouri.

District of Wisconsin

(Established, September 6 1862-January 30 1865, transferred with the Department of the Northwest to Military Division of the Missouri)

Washington Lafayette Elliott (September 6 1862-February 15 1863), Thomas Church Haskell Smith (February 16 1863-January 30 1865)

September 6 1862: The District of Wisconsin was established in the Department of the Northwest, comprising the state of Wisconsin. Brigadier-General Washington Lafayette Elliott assumed command of the District of Wisconsin.

February 16 1863: Brigadier-General Thomas Church Haskell Smith assumed command of the District of Wisconsin, succeeding Brigadier-General Washington Lafayette Elliott.

January 30 1865: The District of Wisconsin transferred with the Department of the Northwest to the Military Division of the Missouri.

First District of the Northwest

(Established, November 17 1862-June 1 1863, discontinued, to District of Dakota and District of Iowa)

John Cook (November 17 1862-June 1 1863)

November 17 1862: The First District of the Department of the Northwest was established. It comprised Iowa and the Dakota Territory. Brigadier-General John Cook assumed command of the First District of the Department of the Northwest.

June 1 1863: The First District of the Department of the Northwest was discontinued.

Second District of the Northwest

(Established, November 17 1862-November 20 1862, discontinued, to District of Minnesota)

Henry Hastings Sibley (November 17 1862-November 20 1862)

November 17 1862: The Second District of the Department of the Northwest was established. It comprised the vicinity of Fort Snelling, Minnesota. Brigadier-General Henry Hastings Sibley assumed command of the Second District of the Department of the Northwest.

November 23 1862: The Second District of the Department of the Northwest was discontinued, and renamed the District of Minnesota.

Third District of the Northwest

(Established, November 17 1862-November 27 1862, discontinued)

Minor T Thomas (November 17 1862-November 27 1862)

November 17 1862: The Third District of the Department of the Northwest was established. It comprised the vicinity of Fort Ripley, Minnesota. Colonel Minor T Thomas assumed command of the Third District of the Department of the Northwest.

November 27 1862: The Third District of the Department of the Northwest was discontinued.

Fourth District of the Northwest

(Established, November 17 1862-November 27 1862, discontinued)

Francis Peteler (November 17 1862-November 27 1862)

November 17 1862: The Fourth District of the Department of the Northwest was established. It comprised the vicinity of Fort Abercrombie, Minnesota. Lieutenant-Colonel Francis Peteler assumed command of the Fourth District of the Department of the Northwest.

November 27 1862: The Fourth District of the Department of the Northwest was discontinued.

District of Minnesota

(Established, from Second District of the Northwest, November 23 1862-January 30 1865, transferred to Military Division of the Missouri)

Henry Hastings Sibley (November 23 1862-January 30 1865)

November 23 1862: The Second District of the Department of the Northwest was discontinued, and renamed the District of Minnesota. The District of Minnesota was established in the Department of the Northwest, from Second District, Third District and Fourth District of the Department of the Northwest including Fort Snelling, Fort Ridgely, and Fort Abercrombie. Brigadier-General Henry Hastings Sibley assumed command of the District of Minnesota.

January 30 1865: The District of Minnesota transferred with the Department of the Northwest to the Military Division of the Missouri.

District of Dakota

(Established, from First District of the Northwest, June 1 1863-December 4 1863, discontinued, to District of Iowa)

Alfred Sully (June 1 1863-December 4 1863)

June 1 1863: The District of Dakota was established in the Department of the Northwest, comprising the Dakota Territory. Brigadier-General Alfred Sully assumed command of the District of Dakota.

December 4 1863: The District of Dakota was discontinued, and its territory incorporated into the District of Iowa.

District of Iowa

(Established, from First District of the Northwest, June 8 1863-November 12 1864, discontinued)

Benjamin Stone Roberts (June 8 1863-December 3 1864, Alfred Sully (December 4 1863-November 12 1864)

June 8 1863: The District of Iowa was established in the Department of the Northwest, comprising the state of Iowa. Brigadier-General Benjamin Stone Roberts assumed command of the District of Iowa.

December 4 1863: The District of Dakota was discontinued, and its territory incorporated into the District of Iowa. Brigadier-General Alfred Sully assumed command of the District of Iowa, succeeding Brigadier-General Benjamin Stone Roberts.

November 12 1864: The District of Iowa was discontinued.

Department of the Missouri

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-May 27 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Henry Wager Halleck (September 19 1862-September 23 1862, Samuel Ryan Curtis (September 24 1862-March 12 1863 interim to March 23 1863), John McAllister Schofield (March 13 1863-January 22 1864 interim to January 29 1864), William Starke Rosecrans (January 30 1864-May 27 1864)

September 19 1862: The Department of the Missouri was re-organised, to comprise Missouri, Arkansas, Kansas, and the Indian Territory. The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri. Kansas and Indian Territory were transferred from the Department of Kansas to the Department of the Missouri. Alton, Illinois, transferred from the Department of the Ohio to the Department of the Missouri. Major-General Henry Wager Halleck retained command of the Department of the Missouri. The District of Northwest Missouri transferred with the Department of the Missouri. The District of Southwest Missouri transferred with the Department of the Missouri. The District of Missouri transferred with the Department of the Missouri. The District of St Louis was established in the Department of the Missouri. The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri.

September 24 1862: Major-General Samuel Ryan Curtis assumed command of the Department of the Missouri, succeeding Major-General Henry Wager Halleck.

September 26 1862: The District of Missouri was discontinued, and its territory transferred to the District of Central Missouri. The District of Central Missouri was established in the Department of the Missouri.

September 27 1862: The District of Northeast Missouri was established in the Department of the Missouri, from the District of Missouri.

October 1 1862: The Army of Southwestern Missouri was established in the Department of the Missouri.

October 11 1862: The District of Colorado (apart from Fort Garland) transferred to the Department of the Missouri.

October 12 1862: The Army of Southwestern Missouri was discontinued, and incorporated into the Army of the Frontier. The Army of the Frontier was established in the Department of the Missouri, comprising the field forces of the former Army of Kansas and the Army of Southwestern Missouri.

November 2 1862: The District of Colorado was renamed as the District of Colorado Territory. The District of Colorado Territory transferred to the Department of the Missouri. The District of Eastern Arkansas was established in the Department of the Missouri. The District of Nebraska Territory was established in the Department of the Missouri. The District of Rolla was established in the Department of the Missouri.

December 3 1862: The Army of Southeastern Missouri was established in the Department of the Missouri.

December 12 1862: The Army of the Southwest was discontinued.

January 1 1863: The District of Colorado Territory was discontinued in the Department of the Missouri.

January 19 1863: Portions of Arkansas were transferred temporarily from the Department of the Missouri to the Department of the Tennessee.

March 13 1863: Brigadier-General John McAllister Schofield was appointed to command the Department of the Missouri, arriving on 24th March 1863, succeeding Major-General Samuel Ryan Curtis.

March 24 1863: Brigadier-General John McAllister Schofield arrived to command the Department of the Missouri, succeeding Major-General Samuel Ryan Curtis.

March 26 1863: The Army of Southeastern Missouri was discontinued.

March 30 1863: The District of Southwest Missouri was extended southwards to the Arkansas River. The District of St Louis was reduced in territory.

June 9 1863: The District of the Border was established in the Department of the Missouri. The District of the Frontier was established in the Department of the Missouri.

June 16 1863: The District of Southeast Missouri was established in the Department of the Missouri.

July 6 1863: The District of Northwest Missouri was discontinued, and incorporated into the District of North Missouri. The District of North Missouri was established in the Department of the Missouri.

July 15 1863: The counties of Vernon, Barton, Jasper, Newton and McDonald were transferred from the District of the Frontier to the District of Southwest Missouri.

July 25 1863: The Army of Arkansas was established in the Department of the Missouri.

August 7 1863: The Army of the Frontier was discontinued.

November 30 1863: The District of Southeast Missouri was discontinued, and its territory transferred to the District of St Louis. The District of Northern Arkansas (also known as the District of Northeastern Arkansas) was established in the Department of the Missouri.

January 1 1864: The District of Nebraska Territory transferred from the Department of the Missouri to the Department of Kansas.

January 6 1864: The District of Northern Arkansas transferred from the Department of the Missouri to the Department of Arkansas. The District of the Frontier transferred from the Department of the Missouri and was divided into two parts: The District of the Frontier (Kansas) in the Department of Kansas; and the District of the Frontier (Arkansas) in the Department of Arkansas.

January 22 1864: Major-General William Starke Rosecrans was appointed to command the Department of the Missouri, arriving on 30th January 1864.

January 30 1864: Major-General William Starke Rosecrans arrived to command the Department of the Missouri, succeeding Major-General McAllister Schofield.

February 7 1864: The District of Northeast Missouri was discontinued in the Department of the Missouri.

February 15 1864: Alton, Illinois, transferred back from the Northern Department to the Department of the Missouri.

May 27 1864: The Department of the Missouri transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of St Louis transferred with the Department of the Missouri. The District of Southwest Missouri transferred with the Department. The District of Central Missouri transferred with the Department of the Missouri. The District of Rolla transferred with the Department of the Missouri. The Distinct of North Missouri transferred with the Department of the Missouri.

District of St Louis

(Established, September 19 1862-May 27 1864, to Military Division of West Mississippi (Trans-Mississippi Military Division))

John Wynn Davidson September 19 1862-December 2 1862) Vacant (December 3 1862-February 22 1863), John Wynn Davidson (February 23 1863-June 15 1863), William Kerley Strong (June 16 1863-May 27 1864)

September 19 1862: The District of St Louis was established in the Department of the Missouri. Brigadier-General John Wynn Davidson assumed command of the District of St Louis.

December 3 1862: Command of the District of St Louis became vacant.

February 23 1863: Brigadier-General John Wynn Davidson assumed command of the District of St Louis.

March 30 1863: The District of St Louis was reduced when the border with the District of Rolla was drawn as the 91 degree west longitude from the northern line of Washington County south through the counties of Washington, Iron, Reynolds, Centre and Ripley to the southern border of Missouri.

June 16 1863: The District of Southeast Missouri was established in the Department of the Missouri, comprising that part of the District of St Louis south of a line running east through Steeleville, including Cape Girardeau, Centreville, Fredericktown, Ironton, New Madrid, Patterson and Pilot Knob, Missouri. Brigadier-General William Kerley Strong assumed command of the District of St Louis, succeeding Brigadier-General John Wynn Davidson.

November 30 1863: The District of Southeast Missouri was discontinued, and its territory transferred to the District of St Louis. Command of the District of St Louis became vacant.

May 27 1864: The District St Louis of transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Southwest Missouri

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-May 27 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Egbert Benson Brown (September 19 1862-September 23 1862), John McAllister Schofield (September 24 1862-November 9 1862), Egbert Benson Brown (November 10 1862-March 29 1863), John McAllister Schofield (March 30 1863-May 23 1863), William Fletcher Cloud (temporary May 24 1863-June 14 1863), John McNeil (June 15 1863-October 14 1863), John Benjamin Sanborn (October 15 1863-May 27 1864)

September 19 1862: The District of Southwest Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri. It comprised the counties of Vernon, Barton, Jasper, Newton, McDonald, Cedar, Dade, Lawrence, Barry, Polk, Green, Christian, Stone, Taney, Ozark, Douglas, Webster, Wright, La Clede and parts of Hickory and St Clair in Missouri. State Brigadier-General Egbert Benson Brown retained command of the District of Southwest Missouri. The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri.

September 24 1862: Brigadier-General John McAllister Schofield assumed command of the District of Southwest Missouri, succeeding State Brigadier-General Egbert Benson Brown.

November 10 1862: State Brigadier-General Egbert Benson Brown assumed command of the District of Southwest Missouri, succeeding Major-General John McAllister Schofield.

March 30 1863: The District of Southwest Missouri was extended southwards to the Arkansas River. Brigadier-General John McAllister Schofield assumed command of the District of Southwest Missouri, succeeding Brigadier-General Egbert Benson Brown.

May 24 1863: Colonel William Fletcher Cloud assumed temporary command of the District of Southwest Missouri, succeeding Major-General John McAllister Schofield.

June 9 1863: The counties of Vernon, Barton, Jasper, Newton and McDonald were transferred from the District of Southwest Missouri to the District of the Frontier.

June 15 1863: Brigadier-General John McNeil assumed command of the District of Southwest Missouri, succeeding Colonel William Fletcher Cloud.

July 15 1863: The counties of Vernon, Barton, Jasper, Newton and McDonald were transferred from the District of the Frontier to the District of Southwest Missouri.

October 15 1863: Brigadier-General John Benjamin Sanborn assumed command of the District of Southwest Missouri, succeeding Brigadier-General John McNeil.

May 27 1864: The District of Southwest Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Northwest Missouri

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-July 6 1863, discontinued, to District of North Missouri)

Willard Preble Hall (September 19 1862-April 9 1863), Chester Harding (April 10 1863-June 22 1863), Willard Preble Hall (June 23 1863-July 6 1863)

September 19 1862: The District of Northwest Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri. Colonel Willard Preble Hall retained command of the District of Northwest Missouri.

April 10 1863: Colonel Chester Harding assumed command of the District of Northwest Missouri, succeeding Colonel Willard Preble Hall.

June 23 1863: State Brigadier-General Willard Preble Hall assumed command of the District of Northwest Missouri, succeeding Colonel Chester Harding.

July 6 1863: The District of Northwest Missouri was discontinued, and incorporated into the District of North Missouri.

District of Missouri

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-September 26 1862, discontinued, to District of Central Missouri)

John McAllister Schofield (September 19 1862-September 26 1862)

September 19 1862: The District of Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri. Brigadier-General John McAllister Schofield retained command of the District of Missouri.

September 26 1862: The District of Missouri was discontinued, and its territory transferred to the District of Central Missouri.

District of Central Missouri

(Established from District of Missouri, September 26 1862-May 27 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Benjamin Franklin Loan (September 26 1863-June 8 1863), Egbert Benson Brown (June 9 1863-May 27 1864)

September 26 1862: The District of Central Missouri was established in the Department of the Missouri, comprising the region of Missouri between the Missouri and Osage Rivers. State Brigadier-General Benjamin Franklin Loan assumed command of the District of Central Missouri.

June 9 1863: Brigadier-General Egbert Benson Brown assumed command of the District of Central Missouri, succeeding Colonel Benjamin Franklin Loan.

May 27 1864: The District of Central Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division).

 

District of Northeast Missouri

(Established, September 27 1862-February 7 1864, discontinued)

Lewis Merrill (September 27 1862-January 26 1863), Thomas Jefferson McKean (January 26 1863-March 12 1863), Thomas Alfred Davies (March 12 1863-February 7 1864)

September 27 1862: The District of Northeast Missouri was established in the Department of the Missouri, from the District of Missouri and comprising the posts of Sturgeon, Fayette, Paris, Canton, Kirkesville, Macon, Palmyra, Columbia, Fulton, Hannibal and Warrenton. Colonel Lewis Merrill assumed command of the District of Northeast Missouri.

January 26 1863: Brigadier-General Thomas Jefferson McKean assumed command of the District of Northeast Missouri, succeeding Colonel Lewis Merrill.

March 12 1863: Brigadier-General Thomas Alfred Davies assumed command of the District of Rolla, succeeding Colonel John Montgomery Glover.

February 7 1864: The District of Northeast Missouri was discontinued in the Department of the Missouri.

 

District of Colorado

(Transferred from War Department, October 11 1862-November 2 1862, discontinued, to District of Colorado Territory)

John Milton Chivington (October 11 1862-November 2 1862)

October 11 1862: The District of Colorado (apart from Fort Garland) transferred from the War Department to the Department of the Missouri. Colonel John Milton Chivington retained command of the District of Colorado.

November 2 1862: The District of Colorado was discontinued, and renamed as the District of Colorado Territory. The District of Colorado Territory transferred to the Department of the Missouri.

District of Colorado Territory

(From District of Colorado, November 2 1862-January 1 1863, discontinued)

John Milton Chivington (November 2 1862-January 1 1863)

November 2 1862: The District of Colorado was discontinued, and renamed as the District of Colorado Territory. The District of Colorado Territory transferred to the Department of the Missouri. Colonel John Milton Chivington retained command of the District of Colorado Territory.

January 1 1863: The District of Colorado Territory was discontinued in the Department of the Missouri.

District of Eastern Arkansas

(Established November 2 1862-February 14 1863 transferred to Department of the Tennessee)

Alvin Peterson Hovey (November 2 1862-December 2 1862), Willis Arnold Gorman (December 3 1862-February 14 1863)

November 2 1862: The District of Eastern Arkansas was established in the Department of the Missouri, comprising the territory around Helena, Arkansas. Brigadier-General Alvin Peterson Hovey assumed command of the District of Eastern Arkansas.

December 3 1862: Brigadier-General Willis Arnold Gorman assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Alvin Peterson Hovey.

February 14 1863: The District of Eastern Arkansas transferred from the Department of the Missouri to the Department of the Tennessee.

District of Nebraska Territory

(Established, November 2 1862-January 1 1864, to Department of Kansas)

James Craig (November 2 1862-May 4 1863), William Fletcher Sapp (temporary May 5 1863-June 3 1863), Thomas Jefferson McKean (June 4 1863-January 1 1864)

November 2 1862: The District of Nebraska Territory was established in the Department of the Missouri. Brigadier-General James Craig assumed command of the District of Nebraska Territory.

May 5 1863: Lieutenant-Colonel William Fletcher Sapp assumed temporary command of the District of Nebraska Territory, succeeding Brigadier-General James Craig.

June 4 1863: Brigadier-General Thomas Jefferson McKean assumed command of the District of Nebraska Territory, succeeding Lieutenant-Colonel William Fletcher Sapp.

January 1 1864: The District of Nebraska Territory transferred from the Department of the Missouri to the Department of Kansas.

District of Rolla

(Established, November 2 1862-May 27 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

John Montgomery Glover (November 2 1862-March 12 1863), Thomas Alfred Davies (March 13 1863-March 24 1864), Odon Guitar (March 25 1864-May 27 1864)

November 2 1862: The District of Rolla was established in the Department of the Missouri. It was bounded in the east of Missouri at 91 degrees west longitude from its intersection with the northern line of Washington county to the southern boundary of Missouri; in the south the Missouri-Arkansas border; in the north, the northern line of Washington county extended westward to the Gasconade River; and in the west the Gasconade River to the western line of Pulaski county and from there southward to the Missouri-Arkansas border. Colonel John Montgomery Glover assumed command of the District of Rolla.

March 13 1863: Brigadier-General Thomas Alfred Davies assumed command of the District of Rolla, succeeding Colonel John Montgomery Glover.

March 30 1863: The District of St Louis was reduced when the border with the District of Rolla was drawn as the 91 degree west longitude from the northern line of Washington County south through the counties of Washington, Iron, Reynolds, Centre and Ripley to the southern border of Missouri.

March 25 1864: Missouri State Brigadier-General Odon Guitar assumed command of the District of Rolla, succeeding Brigadier-General Thomas Alfred Davies.

May 27 1864: The District of Rolla transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of the Border

(Established, June 9 1863-January 1 1864, transferred to Department of Kansas)

Thomas Ewing (June 9 1863-January 1 1864)

June 9 1863: The District of the Border was established in the Department of the Missouri, comprising the state of Kansas north of the 38th parallel and the two western tiers of counties in Missouri north of the 38th parallel and south of the Missouri River. Brigadier-General Thomas Ewing assumed command of the District of the Border.

January 1 1864: The District of the Border transferred from the Department of the Missouri to the Department of Kansas.

District of the Frontier

(Established, June 9 1863– January 6 1864, transferred to Department of Kansas and Department of Arkansas)

James Gilpatrick Blunt (June 9 1863–January 6 1864)

June 9 1863: The District of the Frontier was established in the Department of the Missouri. It comprised the state of Arkansas west of Dardanelle and the Indian Territory, including Fort Smith. The counties of Vernon, Barton, Jasper, Newton and McDonald were transferred from the District of Southwest Missouri to the District of the Frontier. Brigadier-General James Gilpatrick Blunt assumed command of the District of the Frontier.

July 15 1863: The counties of Vernon, Barton, Jasper, Newton and McDonald were transferred from the District of the Frontier to the District of Southwest Missouri.

January 6 1864: The District of the Frontier transferred from the Department of the Missouri and was divided into two parts: the District of the Frontier (Kansas) in the Department of Kansas; and the District of the Frontier (Arkansas) in the Department of Arkansas.

District of Southeast Missouri

(Established, June 16 1863-November 30 1863, discontinued)

John Wynn Davidson (June 16 1863-July 19 1863), Clinton Bowen Fisk (July 20 1863-November 30 1863)

June 16 1863: The District of Southeast Missouri was established in the Department of the Missouri, comprising part of the District of St Louis south of a line running east through Steeleville, including Cape Girardeau, Centreville, Fredericktown, Ironton, New Madrid, Patterson and Pilot Knob, Missouri. Its territory was taken from the District of St Louis. Brigadier-General John Wynn Davidson assumed command of the District of Southeast Missouri.

July 20 1863: Brigadier-General Clinton Bowen Fisk assumed command of the District of Southeast Missouri, succeeding Brigadier-General John Wynn Davidson.

November 30 1863: The District of Southeast Missouri was discontinued.

District of North Missouri

(Established, from District of Northwest Missouri, July 6 1863-May 27 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Odon Guitar (July 6 1863-April 5 1864), Clinton Bowen Fisk (April 6 1864-May 27 1864)

July 6 1863: The District of Northwest Missouri was discontinued, and incorporated into the District of North Missouri. The District of North Missouri was established in the Department of the Missouri, comprising the territory of the state north of the Missouri River. State Brigadier-General Odon Guitar assumed command of the District of North Missouri.

April 6 1864: Brigadier-General Clinton Bowen Fisk assumed command of the District of North Missouri, succeeding State Brigadier-General Odon Guitar.

May 27 1864: The District of North Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Northern Arkansas

(Established, November 30 1863-January 6 1864, transferred to Department of Arkansas)

Robert Ramsey Livingston (November 30 1863-January 6 1864)

November 30 1863: The District of Northern Arkansas (also known as the District of Northeastern Arkansas) was established in the Department of the Missouri. It comprised the territory around Batesville, Arkansas. Colonel Robert Ramsey Livingston assumed command of the District of Northern Arkansas.

January 6 1864: The District of Northern Arkansas transferred from the Department of the Missouri to the Department of Arkansas.

Army of the Southwest

(Transferred from District of Southwest Missouri, September 19 1862-December 12 1862, discontinued)

Frederick Steele (September 19 1862-October 6 1862), Eugene Asa Carr (October r7 1862-November 11 1862), Willis Arnold Gorman (temporary November 12 1862-December 12 1862)

September 19 1862: The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri. Brigadier-General Frederick Steele retained command of the Army of the Southwest.

October 7 1862: Brigadier-General Eugene Asa Carr assumed command of the Army of the Southwest, succeeding Major-General Frederick Steele.

November 12 1862: Brigadier-General Willis Arnold Gorman assumed temporary command of the Army of the Southwest, succeeding Brigadier-General Eugene Asa Carr.

December 12 1862: The Army of the Southwest was discontinued.

Army of Southwestern Missouri

(Established, October 1 1862-October 12 1862, discontinued, to Army of the Frontier)

John McAllister Schofield (October 1 1862-October 12 1862)

October 1 1862: The Army of Southwestern Missouri was established in the Department of the Missouri. Brigadier-General John McAllister Schofield assumed command of the Army of Southwestern Missouri.

October 12 1862: The Army of Southwestern Missouri was discontinued, and incorporated into the Army of the Frontier.

Army of the Frontier

(Established from Army of Southwestern Missouri, October 12 1862-August 7 1863, discontinued)

John McAllister Schofield (October 12 1862-November 19 1862), James Gilpatrick Blunt (temporary November 20 1862-December 28 1862), John McAllister Schofield (December 29 1862-March 29 1863), Francis Jay Herron (March 30 1863-August 7 1863)

October 12 1862: The Army of the Frontier was established in the Department of the Missouri, comprising the field forces of the former Army of Kansas and the Army of Southwestern Missouri. Brigadier-General John McAllister Schofield assumed command of the Army of the Frontier.

November 20 1862: Brigadier-General James Gilpatrick Blunt assumed temporary command of the Army of the Frontier, succeeding Major-General John McAllister Schofield.

December 29 1862: Brigadier-General John McAllister Schofield assumed command of the Army of the Frontier, succeeding Major-General James Gilpatrick Blunt.

March 30 1863: Major-General Francis Jay Herron assumed command of the Army of the Frontier, succeeding Major-General John McAllister Schofield.

August 7 1863: The Army of the Frontier was discontinued.

Army of Southeastern Missouri

(Established, November 3 1862-March 26 1863, discontinued)

John Wynn Davidson (November 3 1862-March 26 1863)

December 3 1862: The Army of Southeastern Missouri was established in the Department of the Missouri. Brigadier-General John Wynn Davidson assumed command of the Army of Southeastern Missouri.

March 26 1863: The Army of Southeastern Missouri was discontinued.

Army of Arkansas

(Established, July 27 1863-January 6 1864, transferred to Department of Arkansas)

Frederick Steele (July 27 1863-January 6 1864)

July 25 1863: The Army of Arkansas was established in the Department of the Missouri. Major-General Frederick Steele assumed command of the Army of Arkansas.

January 6 1864: The Army of Arkansas transferred from the Department of the Missouri to the Department of Arkansas. Major-General Frederick Steele retained command of the Army of Arkansas.

Department of Kansas

(Established, January 1 1864-January 30 1865, discontinued, to Department of the Missouri)

Samuel Ryan Curtis (January 1 1864-April 19 1864), George Sykes (April 20 1864-January 30 1865)

January 1 1864: The Department of Kansas was established, comprising Kansas, Nebraska Territory, Colorado Territory (except Fort Garland), Indian Territory and Fort Smith in Arkansas, transferred from the Department of the Missouri. Major-General Samuel Ryan Curtis was appointed to command the Department of Kansas, arriving on 16th January 1864. The District of Nebraska Territory transferred from the Department of the Missouri to the Department of Kansas. It included the Nebraska Territory and Julesburg, Colorado Territory. The District of the Border transferred from the Department of the Missouri to the Department of Kansas.

January 6 1864: The District of the Frontier (Kansas) was established after the transfer of part of the District of the Frontier from the Department of the Missouri to the Department of Kansas. It comprised Fort Smith and the Indian Territory.

January 16 1864: Major-General Samuel Ryan Curtis arrived in command of the Department of Kansas.

February 23 1864: The District of the Frontier (Kansas) was discontinued, and incorporated into the District of the Frontier in the Department of Arkansas.

February 28 1864: The District of North Kansas was established in the Department of Kansas. It comprised the territory north of the Kansas River and Sokey Hill Fork, Kansas. The District of South Kansas was established in the Department of Kansas. It comprised Kansas south of the Kansas River and Smoky Hill Fork.

April 17 1864: The Department of Arkansas extended its authority over Fort Smith and the Indian Territory, which had formerly been controlled by the District of the Frontier of the Department of Kansas.

April 20 1864: Major-General George Sykes assumed command of the Department of Kansas, succeeding Major-General Samuel Ryan Curtis.

August 2 1864: The District of the Upper Arkansas was established in the Department of Kansas. It comprised the territory westward from Fort Riley, Kansas, to Fort Lyon, Colorado Territory.

October 15 1864: The Army of the Border was established in the Department of Kansas.

November 8 1864: The Army of the Border was discontinued.

January 30 1865: The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri. The District of Colorado Territory transferred from the Department of Kansas to the Department of the Missouri. The District of Nebraska Territory transferred from the Department of Kansas to the Department of the Missouri. The District of North Kansas transferred from the Department of Kansas to the Department of the Missouri. The District of South Kansas transferred from the Department of Kansas to the Department of the Missouri. The District of the Upper Arkansas transferred from the Department of Kansas to the Department of the Missouri. The District of the Border was discontinued.

District of Nebraska Territory

(Transferred from Department of the Missouri, January 1 1864-January 30 1865, to Department of the Missouri)

Thomas Jefferson McKean (January 1 1864-February 27 1864), Robert Byington Mitchell (February 28 1864-January 30 1865)

January 1 1864: The District of Nebraska Territory transferred from the Department of the Missouri to the Department of Kansas. It included the Nebraska Territory and Julesburg, Colorado Territory. Brigadier-General Thomas Jefferson McKean retained command of the District of Nebraska Territory.

February 28 1864: Brigadier-General Robert Byington Mitchell assumed command of the District of Nebraska Territory, succeeding Brigadier-General Thomas Jefferson McKean.

January 30 1865: The District of Nebraska Territory transferred from the Department of Kansas to the Department of the Missouri.

District of the Border

(Transferred from Department of the Missouri, January 1 1864-January 30 1865, discontinued)

Thomas Ewing (January 1 1864-January 5 1864), William Russell Jones (January 6 1864-January 30 1865)

January 1 1864: The District of the Border transferred from the Department of the Missouri to the Department of Kansas. Brigadier-General Thomas Ewing retained command of the District of the Border.

January 6 1864: Colonel William Russell Judson assumed command of the District of the Border, succeeding Brigadier-General Thomas Ewing.

January 30 1865: The District of the Border was discontinued

District of the Frontier Kansas

(Transferred from Department of the Missouri, January 6 1864-February 23 1864, discontinued, to District of the Frontier)

John Milton Thayer (January 6 1864-February 23 1864)

January 6 1864: The District of the Frontier (Kansas) was established after the transfer of part of the District of the Frontier from the Department of the Missouri to the Department of Kansas. It comprised Fort Smith and the Indian Territory. Brigadier-General John Milton Thayer assumed command of the District of the Frontier (Kansas).

February 23 1864: The District of the Frontier (Kansas) was discontinued, and incorporated into the District of the Frontier in the Department of Arkansas.

District of Colorado Territory

(Established, February 28 1864-January 30 1865, to Department of the Missouri)

John Milton Chivington (February 28 1864-January 3 1865), Thomas Moonlight (January 4 1865-January 30 1865)

February 28 1864: The District of Colorado Territory was established in the Department of Kansas, comprising the Colorado Territory. Colonel John Milton Chivington assumed command of the District of Colorado Territory.

January 4 1865: Colonel Thomas Moonlight assumed command of the District of Colorado Territory, succeeding Colonel John Milton Chivington.

January 30 1865: The District of Colorado Territory transferred from the Department of Kansas to the Department of the Missouri.

District of North Kansas

(Established, February 28 1864-January 30 1865, to Department of the Missouri)

Thomas Alfred Davies (February 28 1864-January 30 1865)

February 28 1864: The District of North Kansas was established in the Department of Kansas. It comprised the territory north of the Kansas River and Sokey Hill Fork, Kansas. Brigadier-General Thomas Alfred Davies assumed command of the District of North Kansas.

January 30 1865: The District of North Kansas transferred from the Department of Kansas to the Department of the Missouri.

District of South Kansas

(Established, February 28 1864-January 30 1865, to Department of the Missouri)

Thomas Jefferson McKean (February 28 1864-August 31 1864), George Sykes (September 1 1864-October 9 1864), James Gilpatrick Blunt (October 10 1864-October 30 1864), Thomas Alfred Davies (October 31 1864-November 21 1864), James Gilpatrick Blunt (November 22 1864-January 30 1865)

February 28 1864: The District of South Kansas was established in the Department of Kansas. It comprised Kansas south of the Kansas River and Smoky Hill Fork. Brigadier-General Thomas Jefferson McKean assumed command of the District of South Kansas.

September 1 1864: Major-General George Sykes assumed command of the District of South Kansas, succeeding Brigadier-General Thomas Jefferson McKean.

October 10 1864: Major-General James Gilpatrick Blunt assumed command of the District of South Kansas, succeeding Major-General George Sykes.

October 31 1864: Brigadier-General Thomas Alfred Davies assumed command of the District of South Kansas, succeeding Major-General James Gilpatrick Blunt.

November 22 1864: Major-General James Gilpatrick Blunt assumed command of the District of South Kansas, succeeding Brigadier-General Thomas Alfred Davies.

January 30 1865: The District of South Kansas transferred from the Department of Kansas to the Department of the Missouri.

District of the Upper Arkansas

(Established, August 2 1864-January 30 1865, to Department of the Missouri)

James Gilpatrick Blunt (August 2 1864-October 13 1864), Benjamin S Henning (temporary October 14 1864-December 21 1864), James Hobart Ford (December 22 1864-January 30 1864)

August 2 1864: The District of the Upper Arkansas was established in the Department of Kansas. It comprised the territory westward from Fort Riley, Kansas, to Fort Lyon, Colorado Territory. Major-General James Gilpatrick Blunt assumed command of the District of the Upper Arkansas.

October 14 1864: Major Benjamin S Henning assumed temporary command of the District of the Upper Arkansas, succeeding Major-General James Gilpatrick Blunt.

December 22 1864: Colonel James Hobart Ford assumed command of the District of the Upper Arkansas, succeeding Major Benjamin S Henning.

January 30 1865: The District of the Upper Arkansas transferred from the Department of Kansas to the Department of the Missouri. It was bounded by north-south lines through Fort Riley and Fort Lyon, on the south by the Indian Territory and on the north by the 92nd parallel.

Army of the Border

(Established, October 14 1864-November 8 1864, discontinued)

Samuel Ryan Curtis (October 14 1864-November 8 1864)

October 15 1864: The Army of the Border was established in the Department of Kansas. Major-General Samuel Ryan Curtis assumed command of the Army of the Border.

November 8 1864: The Army of the Border was discontinued.

Department of Arkansas

(Established, January 6 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Frederick Steele (January 6 1864-March 21 1864), Nathan Kimball (temporary March 22 1864-May 7 1864)

January 6 1864: The Department of Arkansas was established. It comprised all of Arkansas (except Fort Smith which was part of the Department of Kansas). Its territory transferred from the Department of the Missouri. Major-General Frederick Steele was appointed to command the Department of Arkansas, arriving on 30th January 1864. The Army of Arkansas transferred from the Department of the Missouri to the Department of Arkansas. VII Corps (Arkansas) was established in the Army of Arkansas. The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas. The District of Northern Arkansas transferred from the Department of the Missouri to the Department of Arkansas.

January 6 1864: The District of the Frontier (Arkansas) transferred from the Department of the Missouri to the Department of Arkansas. It comprised the state of Arkansas west of Dardanelle, except for Fort Smith.

January 30 1864: Major-General Frederick Steele arrived to command the Department of Arkansas.

February 23 1864: The District of the Frontier (Arkansas) was discontinued, and renamed as the District of the Frontier in the Department of Arkansas.

March 22 1864: Brigadier-General Nathan Kimball assumed temporary command of the Department of Arkansas, succeeding Major-General Frederick Steele.

April 17 1864: The Department of Arkansas extended its authority over Fort Smith and the Indian Territory, which had formerly been controlled by the District of the Frontier of the Department of Kansas.

May 7 1864: The Department of Arkansas transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Northern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of the Frontier transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). The Army of Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of the Frontier Arkansas

(Transferred from Department of the Missouri, January 6 1864-February 23 1864, discontinued, to District of the Frontier)

James Gilpatrick Blunt (January 6 1864-February 23 1864)

January 6 1864: The District of the Frontier (Arkansas) transferred from the Department of the Missouri to the Department of Arkansas. It comprised the state of Arkansas west of Dardanelle, except for Fort Smith. Major-General James Gilpatrick Blunt retained command of the District of the Frontier (Arkansas).

February 23 1864: The District of the Frontier (Arkansas) was discontinued, and renamed as the District of the Frontier in the Department of Arkansas.

District of Northern Arkansas

(Transferred from Department of the Missouri, January 6 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Robert Ramsey Livingston (January 6 1864-May 7 1864)

January 6 1864: The District of Northern Arkansas transferred from the Department of the Missouri to the Department of Arkansas. It comprised the territory around Batesville and Devall’s Bluff, Arkansas. Colonel Robert Ramsey Livingston retained command of the District of Northern Arkansas.

May 7 1864: The District of Northern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of the Frontier

(Established, from District of the Frontier Kansas and District of the Frontier Arkansas, February 23 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

James Gilpatrick Blunt (February 23 1864-May 7 1864)

February 23 1864: The District of the Frontier (Kansas) was discontinued, and incorporated into the District of the Frontier in the Department of Arkansas. The District of the Frontier (Arkansas) was discontinued, and renamed as the District of the Frontier in the Department of Arkansas. The District of the Frontier in the Department of Arkansas was established. Brigadier-General James Gilpatrick Blunt assumed command of the District of the Frontier in the Department of Arkansas.

May 7 1864: The District of the Frontier transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Eastern Arkansas

(Transferred from Department of the Tennessee, January 6 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Napoleon Bonaparte Buford (January 6 1864-May 7 1864)

January 6 1864: The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas. Brigadier-General Napoleon Bonaparte Buford retained command of the District of Eastern Arkansas.

May 7 1864: The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Army of Arkansas

(Transferred from the Department of the Missouri, January 6 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Frederick Steele (January 6 1864-May 7 1864)

January 6 1864: The Army of Arkansas transferred from the Department of the Missouri to the Department of Arkansas. Major-General Frederick Steele retained command of the Army of Arkansas. VII Corps (Arkansas) was established in the Army of Arkansas.

May 7 184: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

VII Corps Arkansas

(Established, January 6 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Frederick Steele (January 6 1864-March 21 1864), Nathan Kimball (temporary March 22 1864-May 7 1864)

January 6 1864: VII Corps (Arkansas) was established in the Army of Arkansas. Major-General Frederick Steele assumed command of VII Corps (Arkansas).

March 22 1864: Brigadier-General Nathan Kimball assumed temporary command of VII Corps (Arkansas), succeeding Major-General Frederick Steele.

May 7 1864: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Military Division of the Missouri

(Established, January 30 1865-June 27 1865, discontinued)

John Pope (January 30 1865-June 27 1865)

January 30 1865: The Military Division of the Missouri was established. It included the Department of the Northwest and the Department of the Missouri. Major-General John Pope was appointed to command the Military Division of the Missouri, arriving on 3rd February 1865. The Department of the Northwest transferred to the Military Division of the Missouri. The Department of the Missouri transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri.

February 3 1865: Major-General John Pope arrived to command the Military Division of the Missouri.

February 16 1865: Montana Territory and the part of Dakota Territory west of 100 degrees longitude were transferred from the Department of the Northwest to the Department of the Missouri.

February 17 1865: The District of Utah transferred from the Department of the Pacific to the Department of the Missouri.

March 21 1865: The Department of Arkansas transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri.

May 17 1865: The Department of Arkansas transferred from the Military Division of the Missouri to the Military Division of the Southwest.

June 27 1865: The Military Division of the Missouri was discontinued. The Department of the Northwest was discontinued, and its territory incorporated into the Department of the Missouri. The Department of the Missouri transferred to the Military Division of the Mississippi.

Department of the Missouri

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

Grenville Mellen Dodge (January 30 1865-June 27 1865)

January 30 1865: The Department of the Missouri transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri. Major-General Grenville Mellen D0dge retained command of the Department of the Missouri. The District of Colorado Territory transferred from the Department of Kansas to the Department of the Missouri. The District of Nebraska Territory transferred from the Department of Kansas to the Department of the Missouri. The District of North Kansas transferred from the Department of Kansas to the Department of the Missouri. The District of South Kansas transferred from the Department of Kansas to the Department of the Missouri. The District of the Upper Arkansas transferred from the Department of Kansas to the Department of the Missouri. The District of St Louis transferred with the Department of the Missouri to the Military Division of the Missouri. The District of Southwest Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. The District of Central Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. The District of Rolla transferred with the Department of the Missouri to the Military Division of the Missouri. The District of North Missouri transferred with the Department of the Missouri to the Military Division of the Missouri.

February 16 1865: Montana Territory and the part of Dakota Territory west of 100 degrees longitude were transferred from the Department of the Northwest to the Department of the Missouri.

February 17 1865: The District of Utah transferred from the Department of the Pacific to the Department of the Missouri.

March 28 1865: The District of Utah was discontinued, and its territory incorporated into the District of the Plains. The District of Colorado Territory was discontinued, and its territory incorporated into the District of the Plains. The District of Nebraska Territory was discontinued, and its territory incorporated into the District of the Plains.

April 22 1865: The District of South Kansas transferred from the Department of the Missouri to the Department of Arkansas.

April 22 1865: Fort Lyon, Colorado Territory, transferred from the District of the Plains to the District of the Upper Arkansas.

May 25 1865: The District of the Plains was discontinued.

May 27 1865: The District of North Kansas was discontinued.

June 27 1865: The Military Division of the Mississippi was reorganised to consist of the Department of the Ohio, the Department of the Missouri and the Department of Arkansas. The Department of the Northwest was discontinued, and its territory incorporated into the Department of the Missouri. The Department of the Missouri transferred to the Military Division of the Mississippi. Alton, Illinois, transferred from the Department of the Missouri to the Department of the Ohio. The District of St Louis transferred with the Department of Missouri to the Military Division of the Mississippi. The District of Southwest Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. The District of Central Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. The District of Rolla transferred with the Department of Missouri to the Military Division of the Mississippi. The District of North Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. The District of the Upper Arkansas transferred with the Department of Missouri to the Military Division of the Mississippi.

District of St Louis

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

George Day Wagner (January 30 1865-June 19 1865), James Alexander Williamson (June 20 1865-June 27 1865)

January 30 1865: The District of St Louis transferred with the Department of the Missouri to the Military Division of the Missouri. Brigadier-General George Day Wagner retained command of the District of St Louis.

June 20 1865: Brigadier-General James Alexander Williamson assumed command of the District of St Louis, succeeding Brigadier-General George Day Wagner.

June 27 1865: The District of St Louis transferred with the Department of Missouri to the Military Division of the Mississippi.

District of Southwest Missouri

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

John Benjamin Sanborn (January 30 1865-June 9 1865), John D Allen (temporary June 10 1865-June 18 1865), Thomas Jefferson McKean (June 19 1865-June 27 1865)

January 30 1865: The District Southwest Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. Brigadier-General John Benjamin Sanborn retained command of the District of Southwest Missouri.

June 10 1865: Colonel John D Allen assumed temporary command of the District of Southwest Missouri, succeeding Brigadier-General John Benjamin Sanborn.

June 19 1865: Brigadier-General Thomas Jefferson McKean assumed command of the District of Southwest Missouri, succeeding Colonel John D Allen.

June 27 1865: The District of Southwest Missouri transferred with the Department of Missouri to the Military Division of the Mississippi.

District of Central Missouri

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

John Finis Philips (January 30 1865-April 11 1865), Chester Harding (April 12 1865-June 25 1865), John Lourie Beveridge (June 26 1865-June 27 1865)

January 30 1865: The District of Central Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. Colonel John Finis Philips retained command of the District of Central Missouri.

April 12 1865: Colonel Chester Harding assumed command of the District of Central Missouri, succeeding Colonel John Finis Philips.

June 26 1865: Colonel John Lourie Beveridge assumed command of the District of Central Missouri, succeeding State Colonel Chester Harding.

June 27 1865: The District of Central Missouri transferred with the Department of Missouri to the Military Division of the Mississippi.

District of Rolla

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

Egbert Benson Brown (January 30 1865-March 7 1865), Edwin C Catherwood (March 8 1865-March 16 1865), John Morrill (March 17 1865-June 27 1865)

January 30 1865: The District of Rolla transferred with the Department of the Missouri to the Military Division of the Missouri. Brigadier-General Egbert Benson Brown retained command of the District of Rolla.

March 8 1865: Colonel Edwin C Catherwood assumed temporary command of the District of Rolla, succeeding Brigadier-General Egbert Benson Brown.

March 17 1865: Colonel John Morrill assumed command of the District of Rolla, succeeding Colonel Edwin C Catherwood.

June 27 1865: The District of Rolla transferred with the Department of Missouri to the Military Division of the Mississippi.

District of North Missouri

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

Clinton Bowen Fisk (January 30 1865-May 24 1865), vacant May 25 1865-May 27 1865), George Spalding (May 28 1865-June 27 1865)

January 30 1865: The District of North Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. Brigadier-General Clinton Bowen Fisk retained command of the District of North Missouri.

May 25 1865: Command of the District of North Missouri became vacant.

May 28 1865: Colonel George Spalding assumed command of the District of North Missouri, succeeding Brigadier-General Clinton Bowen Fisk.

June 27 1865: The District of North Missouri transferred with the Department of Missouri to the Military Division of the Mississippi.

District of Colorado Territory

(Transferred from Department of Kansas, January 30 1865-March 28 1865, discontinued, to District of the Plains)

John Milton Chivington (January 30 1865-March 28 1865)

January 30 1865: The District of Colorado Territory transferred from the Department of Kansas to the Department of the Missouri. Colonel John Milton Chivington assumed command of the District of Colorado Territory, succeeding Colonel Thomas Moonlight.

March 28 1865: The District of Colorado Territory was discontinued, and its territory incorporated into the District of the Plains.

District of Nebraska Territory

(Transferred from Department of Kansas, January 30 1865-March 28 1865, discontinued, to District of the Plains)

Robert Byington Mitchell (January 30 1865-March 28 1865)

January 30 1865: The District of Nebraska Territory transferred from the Department of Kansas to the Department of the Missouri. Brigadier-General Robert Byington Mitchell retained command of the District of Nebraska Territory.

March 28 1865: The District of Nebraska Territory was discontinued, and its territory incorporated into the District of the Plains.

District of North Kansas

(Transferred from Department of Kansas, January 30 1865-May 27 1865, discontinued)

Thomas Alfred Davies (January 30 1865-March 27 1865), Robert Byington Mitchell (March 28 1865-May 27 1865)

January 30 1865: The District of North Kansas transferred from the Department of Kansas to the Department of the Missouri. Brigadier-General Thomas Alfred Davies retained command of the District of North Kansas.

March 28 1865: Brigadier-General Robert Byington Mitchell assumed command of the District of North Kansas, succeeding Brigadier-General Thomas Alfred Davies.

May 27 1865: The District of North Kansas was discontinued.

District of South Kansas

(Transferred from Department of Kansas, January 30 1865-April 22 1865, transferred to Department of Arkansas)

James Gilpatrick Blunt (January 30 1865-April 22 1865)

January 30 1865: The District of South Kansas transferred from the Department of Kansas to the Department of the Missouri. Major-General James Gilpatrick Blunt retained command of the District of South Kansas.

April 22 1865: The District of South Kansas transferred from the Department of the Missouri to the Department of Arkansas. It comprised the vicinity of Fort Gibson, Indiana Territory.

District of the Upper Arkansas

(Transferred from Department of Kansas, January 30 1865-June 27 1865, transferred to Military Division of the Mississippi)

James Hobart Ford (January 30 1865-June 27 1865)

January 30 1865: The District of the Upper Arkansas transferred from the Department of Kansas to the Department of the Missouri. It was bounded by north-south lines through Fort Riley and Fort Lyon, on the south by the Indian Territory and on the north by the 92nd parallel. Colonel James Hobart Ford retained command of the District of the Upper Arkansas.

April 22 1865: Fort Lyon, Colorado Territory, transferred from the District of the Plains transferred to the District of the Upper Arkansas.

June 27 1865: The District of the Upper Arkansas transferred with the Department of Missouri to the Military Division of the Mississippi.

District of Utah

(Transferred from Department of the Pacific, February 17 1865-March 28 1865, discontinued, to District of the Plains)

Patrick Edward Connor (February 17 1865-March 28 1865)

February 17 1865: The District of Utah transferred from the Department of the Pacific to the Department of the Missouri. It comprised Utah Territory and the state of Nevada, and Soda Springs, Idaho Territory. Brigadier-General Patrick Edward Connor retained command of the District of Utah.

March 28 1865: The District of Utah was discontinued, and its territory incorporated into the District of the Plains.

District of the Plains

(From District of Utah, District of Nebraska Territory and District of Colorado Territory, March 28 1865-May 25 1865, discontinued)

Patrick Edward Connor (March 28 1865-May 25 1865)

March 28 1865: The District of Utah was discontinued, and its territory incorporated into the District of the Plains. The District of Colorado Territory was discontinued, and its territory incorporated into the District of the Plains. The District of Nebraska Territory was discontinued, and its territory incorporated into the District of the Plains. The District of the Plains was established in the Department of the Missouri. It combined the Districts of Utah, Colorado and Nebraska. Brigadier-General Patrick Edward Connor assumed command of the District of the Plains.

April 22 1865: Fort Lyon, Colorado Territory, transferred from the District of the Plains to the District of the Upper Arkansas.

May 25 1865: The District of the Plains was discontinued.

Department of the Northwest

(Transferred to Military Division of the Missouri, January 30 1865-June 27 1865, transferred to Department of the Missouri)

John Pope (interim January 30 1865-February 19 1865), Samuel Ryan Curtis (January 30 1865-June 27 1865)

January 30 1865: The Department of the Northwest transferred to the Military Division of the Missouri. Major-General John Pope retained interim command of the Department of the Northwest, pending the arrival of Major-General Samuel Ryan Curtis. Major-General Samuel Ryan Curtis was appointed to command the Department of the Northwest, arriving on 17th February 1865. The District of Wisconsin transferred with the Department of the Northwest to the Military Division of the Missouri. The District of Minnesota transferred with the Department of the Northwest to the Military Division of the Missouri.

February 16 1865: Montana Territory and the part of Dakota Territory west of 100 degrees longitude were transferred from the Department of the Northwest to the Department of the Missouri.

February 19 1865: Major-General Samuel Ryan Curtis arrived to command the Department of the Northwest.

June 27 1865: The Department of the Northwest was discontinued, and its territory incorporated into the Department of the Missouri. The District of Wisconsin was discontinued. The District of Minnesota transferred from the Department of the Northwest to the Department of the Missouri.

District of Wisconsin

(Transferred to Military Division of the Missouri, January 30 1865-June 27 1865, discontinued)

Thomas Church Haskell Smith (January 30 1865-April 16 1865), Thomas Alfred Davies (April 17 1865-June 27 1865)

January 30 1865: The District of Wisconsin transferred with the Department of the Northwest to the Military Division of the Missouri. Brigadier-General Thomas Church Haskell Smith retained command of the District of Wisconsin.

April 17 1865: Brigadier-General Thomas Alfred Davies assumed command of the District of Wisconsin, succeeding Brigadier-General Thomas Church Haskell Smith.

June 27 1865: The District of Wisconsin was discontinued.

District of Minnesota

(Transferred to Military Division of the Missouri, January 30 1865-June 27 1865, transferred to Department of the Missouri)

John Cook (January 30 1865-June 27 1865)

January 30 1865: The District of Minnesota transferred with the Department of the Northwest to the Military Division of the Missouri. Brigadier-John Cook retained command of the District of Minnesota.

June 27 1865: The District of Minnesota transferred from the Department of the Northwest to the Department of the Missouri.

Department of Arkansas

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), March 21 1865-May 17 1865, transferred to Military Division of the Southwest)

Joseph Jones Reynolds (March 21 1865-May 17 1865)

March 21 1865: The Department of Arkansas transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri. Major-General Joseph Jones Reynolds retained command of the Department of Arkansas. The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Missouri.

April 22 1865: The District of South Kansas transferred from the Department of the Missouri to the Department of Arkansas. It comprised the vicinity of Fort Gibson, Indiana Territory.

May 17 1865: The Department of Arkansas transferred from the Military Division of the Missouri to the Military Division of the Southwest. The District of South Kansas transferred with the Department of Arkansas to the Military Division of the Southwest. The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Southwest.

District of Eastern Arkansas

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), March 21 1865-May 17 1865, transferred to Military Division of the Southwest)

Alexander McDowell McCook (March 21 1865-April 26 1865), Charles Bentzoni (temporary April 27 1865-May 12 1865), John Milton Thayer (May 13 1865-May 17 1865)

March 21 1865: The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. Major-General Alexander McDowell McCook retained command of the District of Eastern Arkansas.

April 27 1865: Colonel Charles Bentzoni assumed temporary command of the District of Eastern Arkansas, succeeding Major-General Andrew McDowell McCook.

May 13 1865: Brigadier-General John Milton Thayer assumed command of the District of Eastern Arkansas, succeeding Colonel Charles Bentzoni.

May 17 1865: The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest.

District of South Kansas

(Transferred from Department of the Missouri, April 22 1865-May 17 1865, transferred to Military Division of the Southwest)

James Gilpatrick Blunt (April 22 1865-May 17 1865)

April 22 1865: The District of South Kansas transferred from the Department of the Missouri to the Department of Arkansas. It comprised the vicinity of Fort Gibson, Indiana Territory. Major-General James Gilpatrick Blunt retained command of the District of South Kansas.

May 17 1865: The District of South Kansas transferred with the Department of Arkansas to the Military Division of the Southwest.

Army of Arkansas

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), March 21 1865-May 17 1865, transferred to Military Division of the Southwest)

Joseph Jones Reynolds (March 21 1865-May 17 1865)

March 21 1865: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. Major-General Joseph Jones Reynolds retained command of the Army of Arkansas.

May 17 1865: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Southwest.

VII Corps Arkansas

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), March 21 1865-May 17 1865, transferred to Military Division of the Southwest)

Joseph Jones Reynolds (March 21 1865-May 17 1865)

March 21 1865: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Missouri. Major-General Joseph Jones Reynolds retained command of VII Corps (Arkansas).

May 17 1865: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Southwest.

Part 3d: Gulf Coast Theatre

Summary

This theatre broadly covers the states of Texas, Louisiana, Alabama, Florida and adjacent operational regions.

The outbreak of war found only isolated outposts still in the hands of the Federal authorities and all but one of these were quickly taken over by the Confederates with varying degrees of resistance. The important Department of Texas continued in nominal existence until November 1862 despite there being no organised military force in the state since April 1861.

The exception was Fort Pickens near Pensacola, Florida. And a new Department of Florida was established almost immediately after the outbreak of hostilities with headquarters at Fort Pickens. Theoretically, the Department was responsible for the entire state of Florida although the fort was the only Union-occupied ground. By January 11 1862, sufficient progress had been made to establish the Department of Key West to oversee the western Florida coast and islands.

The Department of the South was established in March 1862 and took control of the Department of Florida and Department of Key West, which were reduced to Districts of that Department. Responsibility for western Florida and the coastal section of Alabama alternated between the Department of the Gulf and the Department of the South, depending on the evolving military situation and progress of operations. The Department of the Gulf is described here, and the Department of the South is described in Part 3e: Atlantic Coast Theatre.

The seizure of New Orleans in early 1862 led to the capture of much of Louisiana and enabled Union warships to penetrate inland up the Mississippi and Red Rivers, assisting the army as it gradually took control of the lower Mississippi by July 1863. The Department of the Gulf was established under Benjamin Franklin Butler in February 1862, to direct the operations in Louisiana. The coast of Texas was added officially in November 1862, coinciding with the appointment of Nathaniel Prentiss Banks to replace Butler. As new territory was captured, Districts were set up to direct local operations. The Department of the Gulf was the primary authority for operations in the theatre until the end of the war, and its main field force was known as the Army of the Gulf. The bulk of the army was transported from the North by the Navy, but they were increasingly supplemented by detachments coming southwards along the Mississippi and forces recruited locally from freed slaves.

In May 1864 the failed advance towards Texas from the north (Arkansas) and east (Louisiana) proved the need for strategic coordination of operations west of the Mississippi. As a result, the Military Division of West Mississippi (Trans-Mississippi Military Division) was created, responsible for the Department of the Gulf, the Department of Arkansas, and the Department of the Missouri. By the end of 1864 attention was being directed east of the Mississippi and the Department of the Mississippi was added to the Military Division in November 1864. In January 1865, as the objective switched more intensively towards Mobile Bay and the Alabama Coast, the Department of the Missouri (January 1865) was detached, to be followed by the Department of Arkansas in March 1865. After combining all available field forces in a new Army of West Mississippi in February 1865, the campaign was begun against Mobile. The Districts around Mobile were transferred temporarily from their Departments to the direct control of the Military Division for the same operational reasons.

In May 1865 the purpose of the Military Division was complete, and it was discontinued. The Department of the Gulf operated independently from May 1865, however it passed control over Louisiana and Texas to the new Military Division of the Southwest as a show of strength was presented to the French authorities in Mexico. The Department retained its authority in Mississippi, and coastal parts of Alabama and Florida until the post-war reorganisation of June 27 1865, when it ceased to exist.

Department of Texas

(From Pre-War organisation, April 12 1861-November 8 1862, discontinued)

Carlos Adolphus Waite (April 12 1861-April 22 1861), vacant (April 23 1861-November 8 1862)

April 12 1861: Colonel Carolos Adolphus Waite retained command of the Department of Texas.

April 23 1861: The command the Department of Texas became vacant when Colonel Carlos Adolphus Waite was captured by Confederate authorities.

November 8 1862: The Department of Texas was discontinued. The state of Texas was added to the Department of the Gulf.

Department of Florida

(Established, April 13 1861-March 15 1862, discontinued, to Western District of the Department of the South)

Harvey Brown (April 13 1861-January 9 1862), Lewis Golding Arnold (January 10 1862-March 15 1862)

April 13 1861: The Department of Florida was established with headquarters at Fort Pickens, comprising the state of Florida transferred from the Department of the East. Major Harvey Brown was appointed to command the Department of Florida, arriving on 18th April 1861.

April 18 1861: Major Harvey Brown arrived to command the Department of Florida, with headquarters at Fort Pickens in Pensacola Bay.

January 10 1862: Major Lewis Golding Arnold assumed command of the Department of Florida, succeeding Colonel Harvey Brown.

January 11 1862: Key West and the coastline of Florida from Cape Canaveral to the Apalachicola River were transferred from the Department of Florida to the Department of Key West.

March 15 1862: The Department of Florida was discontinued, and its territory incorporated into the Western District of the Department of the South.

Department of Key West

(January 11 1862-March 15 1862, to Southern District of the Department of the South)

John Milton Brannan (January 11 1862-March 15 1862)

January 11 1862: The Department of Key West was established, comprising Florida from Cape Canaveral along the coast to the Apalachicola River, and the Tortugas. Key West and the coastline of Florida from Cape Canaveral to the Apalachicola River were transferred from the Department of Florida to the Department of Key West. Brigadier-General John Milton Brannan was appointed to command the Department of Key West, arriving on 21st February 1862.

February 21 1862: Brigadier-General John Milton Brannan arrived to command the Department of Key West.

March 15 1862: The Department of Key West was discontinued, and incorporated into the Department of the South, later becoming the Southern District if the Department of the South.

Department of the Gulf

(Established, February 23 1862-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Benjamin Franklin Butler (February 23 1862-November 7 1862 interim December 16 1862), Nathaniel Prentiss Banks (November 8 1862-May 7 1864)

February 23 1862: The Department of the Gulf was established, with responsibility for forces west of the Mississippi River in Texas and Louisiana. Major-General Benjamin Franklin Butler was appointed to command the Department of the Gulf, arriving on 20th March 1862. The Army of the Gulf was established in the Department of the Gulf.

March 20 1862: Major-General Benjamin Franklin Butler arrived to command the Department of the Gulf.

August 8 1862: The District of Pensacola was established in the Department of the Gulf, comprising Florida west of the Apalachicola River. The rest of Florida remained in the Department of the South.

November 8 1862: The Department of Texas was discontinued. The state of Texas was added to the Department of the Gulf. Major-General Nathaniel Prentiss Banks was appointed to command the Department of the Gulf, arriving on 17th December 1862. Banks assumed command of the Army of the Gulf, succeeding Major-General Benjamin Franklin Butler on 15th December 1862.

November 9 1862: The District of La Fourche was established in the Department of the Gulf.

December 16 1862: The Defences of New Orleans was established in the Department of the Gulf.

December 17 1862: Major-General Nathaniel Prentiss Banks arrived to command the Department of the Gulf, succeeding Major-General Benjamin Franklin Butler.

March 16 1863: The District of Key West and Tortugas was established in the Department of the Gulf. The Tortugas and West Florida were transferred from the Department of the South and the remainder of Florida remained in the Department of the South.

July 9 1863: The District of Port Hudson was established in the Department of the Gulf.

October 8 1863: The District of Baton Rouge was established in the Department of the Gulf.

May 1 1864: The District of Carrollton was established in the Department of the Gulf.

May 7 1864: The Department of the Gulf transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Pensacola

(Established, from former Western District of the South, August 8 1862-February 1 1864, discontinued, to District of West Florida)

Lewis Golding Arnold (August 8 1862-October 1 1862), Neal S Dow (October 2 1862-January 23 1863), Isaac Dyer (January 24 1863-April 20 1863), William Cune Holbrook (temporary April 21 1863-November 8 1863), Alexander Asboth (November 9 1863-February 1 1864)

August 8 1862: The District of Pensacola was established in the Department of the Gulf, comprising Florida west of the Apalachicola River. The rest of Florida remained in the Department of the South. Brigadier-General Lewis Golding Arnold assumed command of the District of Pensacola.

October 2 1862: Brigadier-General Neal S Dow assumed command of the District of Pensacola, succeeding Brigadier-General Lewis Golding Arnold.

January 24 1863: Colonel Isaac Dyer assumed command of the District of Pensacola, succeeding Brigadier-General Neal S Dow.

April 21 1863: Colonel William Cune Holbrook assumed temporary command of the District of Pensacola, succeeding Colonel Isaac Dyer.

November 9 1863: Brigadier-General Alexander Asboth assumed command of the District of Pensacola, succeeding Colonel William Cune Holbrook.

February 1 1864: The District of Pensacola was discontinued in the Department of the Gulf and its territory transferred to the District of West Florida in the Department of the South.

District of La Fourche

(Established, November 9 1862-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Godfrey Weitzel (November 9 1862-April 29 1863), Henry Warner Birge (April 30 1863-December 31 1863), Edward Leslie Molineux (January 1 1864-January 31 1864), Nicholas Wyckoff Day (February 1 1864-May 3 1864), John McNeil (May 4 1864-May 7 1864)

November 9 1862: The District of La Fourche was established in the Department of the Gulf, comprising the territory west of the Mississippi River and east of the Atchafalaya River in Louisiana. Its authority varied over Bayou Boeuf, Bayou des Allemands, Brashear City, Donaldsonville, Napoleonville, Terre Bonne and Thibodeaux. Brigadier-General Godfrey Weitzel assumed command of the District of La Fourche.

April 30 1863: Colonel Henry Warner Birge assumed command of the District of La Fourche, succeeding Brigadier-General Godfrey Weitzel.

January 1 1864: Colonel Edward Leslie Molineux assumed command of the District of La Fourche, succeeding Brigadier-General Henry Warner Birge.

February 1 1864: Colonel Nicholas Wyckoff Day assumed command of the District of La Fourche, succeeding Colonel Edward Leslie Molineux.

May 4 1864: Brigadier-General John McNeil assumed command of the District of La Fourche, succeeding Colonel Nicholas Wyckoff Day.

May 7 1864: The District of La Fourche transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Defences of New Orleans

(Established, December 16 1862-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Thomas W Cahill (December 16 1862-January 8 1863), Thomas West Sherman (January 9 1863-August 24 1863), Edward Griffin Beckwith (August 25 1863-January 5 1864), Joseph Jones Reynolds (January 5 1864-May 7 1864)

December 16 1862: The Defences of New Orleans was established in the Department of the Gulf, comprising the vicinity of New Orleans, Louisiana. Colonel Thomas W Cahill assumed command of the Defences of New Orleans.

January 9 1863: Brigadier-General Thomas West Sherman assumed command of the Defences of New Orleans, succeeding Colonel Thomas W Cahill.

August 25 1863: Colonel Edward Griffin Beckwith assumed command of the Defences of New Orleans, succeeding Brigadier-General Thomas West Sherman.

January 6 1864: Major-General Joseph Jones Reynolds assumed command of the Defences of New Orleans, succeeding Colonel Edward Griffin Beckwith.

May 7 1864: The Defences of New Orleans transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Key West and Tortugas

(Established, from Department of the South, March 16 1863-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Daniel Phineas Woodbury (March 16 1865-September 12 1863), Charles Hamilton (temporary September 13 1863-October 14 1863), Daniel Phineas Woodbury (October 15 1863-November 30 1863), Charles Hamilton (temporary December 1 1863-December 30 1863), Daniel Phineas Woodbury (December 31 1863-May 7 1864)

March 16 1863: The District of Key West and Tortugas was established in the Department of the Gulf. The Tortugas and West Florida were transferred from the Department of the South and the remainder of Florida remained in the Department of the South. Brigadier-General Daniel Phineas Woodbury assumed command of the District of Key West and Tortugas.

September 13 1863: Colonel Charles Hamilton assumed temporary command of the District of Key West and Tortugas, succeeding Brigadier-General Daniel Phineas Woodbury.

October 15 1863: Brigadier-General Daniel Phineas Woodbury assumed command of the District of Key West and Tortugas, succeeding Colonel Charles Hamilton.

December 1 1863: Colonel Charles Hamilton assumed temporary command of the District of Key West and the Tortugas, succeeding Brigadier-General Daniel Phineas Woodbury.

December 31 1863: Brigadier-General Daniel Phineas Woodbury assumed command of the District of Key West and Tortugas, succeeding Colonel Charles Smith Hamilton

May 7 1864: The District of Key West and Tortugas transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Port Hudson

(Established, July 9 1863-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

George Leonard Andrews (July 9 1863-January 12 1864), Daniel Ullmann (January 13 1864-May 7 1864)

July 9 1863: The District of Port Hudson was established in the Department of the Gulf, comprising the vicinity of Port Hudson, Louisiana. Brigadier-General George Leonard Andrews assumed command of the District of Port Hudson.

January 13 1864: Brigadier-General Daniel Ullmann assumed command of the District of Port Hudson, succeeding Brigadier-General George Leonard Andrews.

May 7 1864: The District of Port Hudson transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Baton Rouge

(Established, October 8 1863-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Philip St George Cooke (October 8 1863-May 1 1864), Henry Warner Birge (May 2 1864-May 7 1864)

October 8 1863: The District of Baton Rouge was established in the Department of the Gulf, comprising the territory around Baton Rouge, Louisiana. Brigadier-General Philip St George Cooke was appointed to command the District of Baton Rouge.

May 2 1864: Brigadier-General Henry Warner Birge assumed command of the District of Baton Rouge, succeeding Brigadier-General Philip St George Cooke.

May 7 1864: The District of Baton Rouge transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Carrollton

(Established, May 1 1864-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Nelson B Bartram (May 1 1864-May 7 1864)

May 1 1864: The District of Carrollton was established in the Department of the Gulf, comprising the territory around Carrollton, Camp Parapet, De Sair, Fort Banks, Kennerville, Jeffersonville and Pass Manchac, Louisiana. Colonel Nelson B Bartram assumed command of the District of Carrollton.

May 7 1864: The District of Carrollton transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Army of the Gulf

(Established, February 23 1862-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Benjamin Franklin Butler (February 23 1862-December 14 1862), Nathaniel Prentiss Banks (December 15 1862-May 7 1864)

February 23 1862: The Army of the Gulf was established in the Department of the Gulf. Major-General Benjamin Franklin Butler assumed command of the Army of the Gulf.

December 15 1862: Major-General Nathaniel Prentiss Banks assumed command of the Army of the Gulf, succeeding Major-General Benjamin Franklin Butler.

December 16 1862: XIX Corps (Gulf) was designated in the Army of the Gulf, comprising all field forces in the Department of the Gulf, and confirmed retroactively on 5th January 1863.

January 5 1863: XIX Corps (Gulf) was officially established retrospectively from 14th December 1862.

August 7 1863: XIII Corps (Tennessee) transferred from the Army of the Tennessee to the Amy of the Gulf.

May 7 1864: The Army of the Gulf transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

XIX Corps Gulf

(Established, December 16 1862-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Nathaniel Prentiss Banks (December 16 1862-August 19 1863), William Buel Franklin (August 20 1863-May 1 1864), William Hemsley Emory (May 2 1864-May 7 1864)

December 16 1862: XIX Corps (Gulf) was designated in the Army of the Gulf, comprising all field forces in the Department of the Gulf, and confirmed retroactively on 5th January 1863. Major-General Nathaniel Prentiss Banks assumed command of XIX Corps (Gulf).

January 5 1863: XIX Corps (Gulf) was officially established retrospectively from 16th December 1862.

August 20 1863: Major-General William Buel Franklin assumed command of XIX Corps (Gulf), succeeding Major-General Nathaniel Prentiss Banks.

May 2 1864: Brigadier-General William Hemsley Emory assumed command of XIX Corps (Gulf), succeeding Major-General William Buel Franklin.

May 7 1864: XIII Corps (Gulf) of transferred with the Army of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

XIII Corps Gulf

(Transferred from Army of the Tennessee, August 7 1863-May 7 1864, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Cadwallader Colden Washburn (August 7 1863-September 14 1863), Edward Otho Cresap Ord (September 15 1863-October 18 1863), Cadwallader Colden Washburn (October 19 1863-October 24 1863), Napoleon Jackson Tecumseh Dana (October 25 1863), Cadwallader Colden Washburn (temporary October 26 1863-January 8 1864), Edward Otho Cresap Ord (January 9 1864-February 19 1864), John Alexander McClernand (February 20 1864-March 14 1864), Thomas Edward Greenfield Ransom (March 15 1864-April 7 1864), Robert Alexander Cameron (April 8 1864-April 26 1864), Michael Kelly Lawler (April 27 1864-May 7 1864)

August 7 1863: XIII Corps (Tennessee) transferred from the Army of the Tennessee to the Army of the Gulf. Major-General Cadwalader Colden Washburn retained command of XIII Corps (Gulf).

September 15 1863: Major-General Edward Otho Cresap Ord assumed command of XIII Corps (Gulf), succeeding Brigadier-General Cadwallader Colden Washburn.

October 19 1863: Major-General Cadwallader Colden Washburn assumed command of XIII Corps (Gulf), succeeding Major-General Edward Otho Cresap Ord.

October 25 1863: Major-General Napoleon Jackson Tecumseh Dana assumed command of XIII Corps (Gulf), succeeding Brigadier-General Cadwallader Colden Washburn.

October 26 1863: Major-General Cadwallader Colden Washburn assumed temporary command of XIII Corps (Gulf), succeeding Major-General Napoleon Jackson Tecumseh Dana.

January 9 1864: Major-General Edward Otho Cresap Ord assumed command of XIII Corps (Gulf), succeeding Brigadier-General Cadwallader Colden Washburn.

February 20 1864: Major-General John Alexander McClernand assumed command of XIII Corps (Gulf), succeeding Major-General Edward Otho Cresap Ord.

March 15 1864: Brigadier-General Thomas Edward Greenfield Ransom assumed command of XIII Corps (Gulf), succeeding Major-General John Alexander McClernand.

April 8 1864: Brigadier-General Robert Alexander Cameron assumed command of XIII Corps (Gulf), succeeding Brigadier-General Thomas Edward Greenfield Ransom.

April 27 1864: Brigadier-General Michael Kelly Lawler assumed command of XIII Corps (Gulf), succeeding Brigadier-General Robert Alexander Cameron.

May 7 1864: XIX Corps (Gulf) of transferred with the Army of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Military Division of West Mississippi (Trans-Mississippi Military Division)

(Established, May 7 1864-May 17 1865, discontinued, interim until June 5 1865, to Military Division of the Southwest)

Edward Richard Sprigg Canby (May 7 1864-November 3 1864), Joseph Jones Reynolds (temporary November 4 1864-November 23 1864), Edward Richard Sprigg Canby (November 24 1864-May 17 1865 interim to June 5 1865)

May 7 1864: The Military Division of West Mississippi (Trans-Mississippi Military Division) was established, comprising the Department of the Gulf and the Department of Arkansas. It was also known as the Trans-Mississippi Military Division. Major-General Edward Richard Sprigg Canby was appointed to command the Military Division of West Mississippi (Trans-Mississippi Military Division), arriving on 11th May 1864. The Department of Arkansas transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). The Department of the Gulf transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division).

May 11 1864: Major-General Edward Richard Sprigg Canby arrived to command the Military Division of West Mississippi (Trans-Mississippi Military Division).

May 27 1864: The Department of the Missouri transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division).

November 4 1864: Major-General Joseph Jones Reynolds assumed temporary command of the Military Division of West Mississippi (Trans-Mississippi Military Division), succeeding Major-General Edward Richard Sprigg Canby.

November 25 1864: Major-General Edward Richard Sprigg Canby assumed command of the Military Division of West Mississippi (Trans-Mississippi Military Division), succeeding Major-General Joseph Jones Reynolds.

November 28 1864: The Department of the Mississippi was established and transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). It comprised the state of Mississippi and the parts of Tennessee west of the Tennessee River taken from the discontinued Department of the Tennessee.

February 10 1865: The District of Key West and Tortugas was detached from the Department of the Gulf to report directly to the Military Division of West Mississippi (Trans-Mississippi Military Division).

February 18 1865: The Army of West Mississippi was established in the Military Division of West Mississippi (Trans-Mississippi Military Division). The Army of the Gulf transferred to the Army of West Mississippi. The Detachment Army of the Tennessee was discontinued, and reverted to the name XVI Corps (Gulf) and transferred to the Army of the Gulf. XVI Corps (Gulf) was established in the Army of the Gulf.

March 1 1865: The District of West Florida and South Alabama transferred from the Department of the Gulf to the direct control of the Military Division of West Mississippi (Trans-Mississippi Military Division). The Sub-District of West Florida transferred with the District of West Florida and South Alabama from the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

March 17 1865: The District of West Florida and South Alabama was discontinued. Its territory transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Department of the Gulf as the new District of West Florida and the District of South Alabama. The Sub-District of West Florida was discontinued, and its territory assigned to the District of West Florida. The District of South Alabama was established in the Department of the Gulf. The District of West Florida was established in the Department of the Gulf.

March 21 1865: The Department of Arkansas transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri. Major-General Joseph Jones Reynolds retained command of the Department of Arkansas. The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Missouri.

May 17 1865: The Military Division of the Southwest was established to comprise parts of the Department of Arkansas and the Department of the Gulf, and the state of Texas. The states of Louisiana and Texas were detached from the Department of the Gulf and assigned to the Military Division of the Southwest. Major-General Philip Henry Sheridan was appointed to command the Military Division of the Southwest, arriving on 29th May 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) was officially discontinued but remained in interim existence until finally disbanded officially on 1st June 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) retained interim responsibility for the Army of West Mississippi and the Army of the Gulf. Major-General Edward Richard Sprigg Canby retained interim command of the Military Division of West Mississippi (Trans-Mississippi Military Division). The Department of the Gulf was separated from the authority of the discontinued Military Division of West Mississippi (Trans-Mississippi Military Division) and became temporarily autonomous, pending transfer to the Military Division of the Southwest. It took responsibility for Mississippi, Alabama and Florida. The District of Key West and Tortugas was discontinued, and its territory assigned to the Department of the Gulf.

June 3 1865: The Army of West Mississippi was discontinued. The Army of the Gulf transferred from the Army of West Mississippi to the Department of the Gulf. XIII Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.  XVI Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.

June 5 1865: The Military Division of West Mississippi (Trans-Mississippi Military Division) was finally disbanded after being officially discontinued on 17th May 1865. The Department of the Mississippi was discontinued. The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf.

Department of the Gulf

(Transferred, to Military Division of West Mississippi (Trans-Mississippi Military Division), May 7 1864-May 17 1865, transferred to War Department)

Nathaniel Prentiss Banks (May 7 1864-September 21 1864 interim September 22 1864), Stephen Augustus Hurlbut (September 22 1864-March 17 1865 interim to April 21 1865, Nathaniel Prentiss Banks (April 22 1865-May 17 1865)

May 7 1864: The Department of the Gulf transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General Nathaniel Prentiss Banks retained command of the Department of the Gulf. The District of La Fourche transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). The Defences of New Orleans transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Key West and Tortugas transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Port Hudson transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Baton Rouge transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Carrollton transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). The Army of the Gulf transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

May 17 1864: The District of West Florida transferred from the Department of the South to the Department of the Gulf.

May 22 1864: The District of Morganza was established in the Department of the Gulf.

August 6 1864: The District of Baton Rouge was discontinued, and re-designated as a Sub-District in the District of Baton Rouge and Port Hudson. The District of Port Hudson was discontinued, and re-designated as a Sub-District in the District of Baton Rouge and Port Hudson. The District of Baton Rouge and Port Hudson was established to comprise the territories of Baton Rouge, Plaquemine, Gaines Landing, Pass Manchac, De Sair and Port Hudson, Louisiana.

September 12 1864: The District of West Florida was discontinued, and renamed as the Sub-District of West Florida. The District of West Florida and South Alabama was established in the Department of the Gulf, comprising the territories of Mobile Bay and Pensacola, Florida. The Sub-District of West Florida was established in the District of West Florida and South Alabama.

September 22 1864: Major-General Stephen Augustus Hurlbut was appointed to command the Department of the Gulf, arriving on 23rd September 1864, to succeed Major-General Nathaniel Prentiss Banks.

September 23 1864: Major-General Stephen Augustus Hurlbut arrived to command the Department of the Gulf, succeeding Major-General Nathaniel Prentiss Banks.

February 9 1865: The Northern District of Louisiana was established in the Department of the Gulf. The Defences of New Orleans was discontinued.

February 10 1865: The District of Key West and Tortugas transferred from the Department of the Gulf and transferred directly to the Military Division of West Mississippi (Trans-Mississippi Military Division).

February 11 1865: The Southern District of Louisiana was established. The District of Carrollton transferred to the Southern District of Louisiana. The District of La Fourche transferred to the Southern District of Louisiana. The District of Morganza transferred to the Northern District of Louisiana.

February 13 1865: The Sub-District of Baton Rouge was discontinued, and its territory transferred to the District of Baton Rouge and Port Hudson. The Sub-District of Port Hudson was discontinued, and its territory transferred to the District of Baton Rouge and the District of Port Hudson. The District of Baton Rouge and Port Hudson was discontinued, and divided into the District of Baton Rouge and the District of Port Hudson. The District of Baton Rouge was established and transferred to the Northern District of Louisiana. The District of Port Hudson was established and transferred to the Northern District of Louisiana.

February 18 1865: The Army of the Gulf transferred to the Army of West Mississippi.

March 1 1865: The District of West Florida and South Alabama transferred from the Department of the Gulf to the direct control of the Military Division of West Mississippi (Trans-Mississippi Military Division). The Sub-District of West Florida transferred with the District of West Florida and South Alabama from the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

March 17 1865: The District of West Florida and South Alabama was discontinued. Its territory transferred to the Department of the Gulf as the new District of West Florida and the District of South Alabama. The Sub-District of West Florida was discontinued, and its territory assigned to the District of West Florida. The District of South Alabama was established in the Department of the Gulf. The District of West Florida was established in the Department of the Gulf.

March 18 1865: Major-General Nathaniel Prentiss Banks was appointed to command the Department of the Gulf, arriving on 22nd April 1865.

March 27 1865: The District of Bonnet Carré was established in the Department of the Gulf. It comprised the territory between Bayou Manchac and Kennerville, Louisiana, west of New Orleans.

April 22 1865: Major-General Nathaniel Prentiss Banks arrived to command the Department of the Gulf, succeeding Major-General Stephen Augustus Hurlbut.

May 17 1865: The Military Division of the Southwest was established to comprise parts of the Department of Arkansas and the Department of the Gulf. The states of Louisiana and Texas were detached from the Department of the Gulf and assigned to the Military Division of the Southwest. Major-General Philip Henry Sheridan was appointed to command the Military Division of the Southwest, arriving on 29th May 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) was officially discontinued to be replaced by the Military Division of the Southwest. It remained in interim existence until finally disbanded officially on 1st June 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) retained interim responsibility for the Army of West Mississippi and the Army of the Gulf. The Department of the Gulf was separated from the authority of the discontinued Military Division of West Mississippi (Trans-Mississippi Military Division) and became temporarily autonomous with responsibility for Mississippi, Alabama and Florida. The District of South Alabama was discontinued, and its territory incorporated into the District of Alabama. The Northern District of Louisiana transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of Morganza transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of Baton Rouge transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of Port Hudson transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The Southern District of Louisiana transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of Carrollton transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of La Fourche transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of West Florida transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf. The District of Bonnet Carré transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf.

District of La Fourche

(Transferred with Department of the Gulf, May 7 1864-February 11 1865, transferred to Southern District of Louisiana)

John McNeil (May 7 1864-June 8 1864), Robert Alexander Cameron (June 9 1864-February 11 1865)

May 7 1864: The District of La Fourche transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General John McNeil retained command of the District of La Fourche.

June 9 1864: Brigadier-General Robert Alexander Cameron assumed command of the District of La Fourche, succeeding Brigadier-General John McNeil.

February 11 1865: The District of La Fourche transferred to the Southern District of Louisiana.

Defences of New Orleans

(Transferred with Department of the Gulf, May 7 1864-February 9 1865, discontinued)

Joseph Jones Reynolds May 7 1864-June 15 1864), Thomas West Sherman (June 16 1864-February 9 1865)

May 7 1864: The Defences of New Orleans transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General Joseph Jones Reynolds retained command of the Defences of New Orleans.

June 16 1864: Brigadier-General Thomas West Sherman assumed command of the Defences of New Orleans succeeding Major-General Joseph Jones Reynolds.

February 9 1865: The Defences of New Orleans was discontinued.

District of Key West and Tortugas

(Transferred with Department of the Gulf, May 7 1864-February 10 1865, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Daniel Phineas Woodbury (May 7 1864-August 14 1864), vacant (August 15 1864-October 14 1864), John Newton (October 15 1864-February 10 1865)

May 7 1864: The District of Key West and Tortugas transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Daniel Phineas Woodbury retained command of the District of Key West and Tortugas.

August 15 1864: Command of the District of Key West and Tortugas became vacant.

October 15 1864: Brigadier-General John Newton assumed command of the District of Key West and Tortugas, following a vacancy.

February 10 1865: The District of Key West and Tortugas transferred from the Department of the Gulf and transferred directly to the Military Division of West Mississippi (Trans-Mississippi Military Division).

District of Port Hudson

(Transferred with Department of the Gulf, May 7 1864-August 6 1864, discontinued, to District of Baton Rouge and Port Hudson)

Daniel Ullmann (May 7 1864-June 22 1864), John McNeil (June 23 1864-August 6 1864)

May 7 1864: The District of Port Hudson transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Daniel Ullmann retained command of the District of Port Hudson.

June 23 1864: Brigadier-General John McNeil assumed command of the District of Port Hudson, succeeding Brigadier-General Daniel Ullmann.

August 6 1864: The District of Port Hudson was discontinued, and re-designated as a Sub-District in the District of Baton Rouge and Port Hudson, in the Department of the Gulf.

District of Baton Rouge

(Transferred with Department of the Gulf, May 7 1864-August 6 1864, discontinued, to District of Baton Rouge and Port Hudson)

Henry Warner Birge (May 7 1864-May 14 1864), William Plummer Benton (May 15 1864-May 30 1864), Fitz-Henry Warren (May 31 1864-June 12 1864), William Plummer Benton (June 13 1864-August 16 1864)

May 7 1864: The District of Baton Rouge transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Henry Warner Birge retained command of Baton Rouge.

May 15 1864: Brigadier-General William Plummer Benton assumed command of the District of Baton Rouge, succeeding Brigadier-General Henry Warner Birge.

May 31 1864: Brigadier-General Fitz-Henry Warren assumed command of the District of Baton Rouge, succeeding Brigadier-General William Plummer Benton.

June 13 1864: Brigadier-General William Plummer Benton assumed command of the District of Baton Rouge, succeeding Brigadier-General Fitz-Henry Warren.

August 6 1864: The District of Baton Rouge was discontinued, and re-designated as a Sub-District in the District of Baton Rouge and Port Hudson, in the Department of the Gulf.

District of Carrollton

(Transferred with Department of the Gulf, May 7 1864-February 11 1865, discontinued, to Southern District of Louisiana)

Nelson B Bartram (May 7 1864-September 30 1864), Nelson Viall (October 1 1864-February 11 1865)

May 7 1864: The District of Carrollton transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Colonel Nelson B Bartram retained command of Carrollton.

October 1 1864: Lieutenant-Colonel Nelson Viall assumed command of the District of Carrollton, succeeding Colonel Nelson B Bartram.

February 11 1865: The District of Carrollton transferred to the Southern District of Louisiana.

District of West Florida

(Transferred from Department of the South, May 17 1864-September 12 1864, discontinued, to Sub-District of West Florida)

Alexander Asboth (May 17 1864-September 12 1864)

May 17 1864: The District of West Florida transferred from the Department of the South to the Department of the Gulf. Brigadier-General Alexander Asboth retained command of the District of West Florida.

September 12 1864: The District of West Florida was discontinued and renamed as the Sub-District of West Florida.

District of Morganza

(Established, May 22 1864-February 11 1865, transferred to Northern District of Louisiana)

William Hemsley Emory (May 22 1864-June 15 1864), Joseph Jones Reynolds (June 16 1864-July 4 1864), Michael Kelly Lawler (July 5 1864-October 29 1864), George Francis McGinnis (October 30 1864-November 22 1864), Daniel Ullmann (November 23 1864-February 11 1865)

May 22 1864: The District of Morganza was established in the Department of the Gulf. Brigadier-General William Hemsley Emory assumed command of the District of Morganza.

June 16 1864: Major-General Joseph Jones Reynolds assumed command of the District of Morganza, succeeding Brigadier-General William Hemsley Emory.

July 5 1864: Brigadier-General Michael Kelly Lawler assumed command of the District of Morganza, succeeding Major-General Joseph Jones Reynolds.

October 30 1864: Brigadier-General George Francis McGinnis assumed command of the District of Morganza, succeeding Brigadier-General Michael Kelly Lawler.

November 23 1864: Brigadier-General Daniel Ullmann assumed command of the District of Morganza, succeeding Brigadier-General George Francis McGinnis.

February 11 1865: The District of Morganza transferred to the Northern District of Louisiana.

District of Baton Rouge and Port Hudson

(Established, from District of Baton Rouge and District of Port Hudson, August 6 1864-February 13 1865, discontinued, to Baton Rouge and District of Port Hudson)

Francis Jay Herron (August 6 1864-October 29 1864), William Plummer Benton (October 30 1864-December 25 1864), George Leonard Andrews (December 26 1864-February 13 1865)

August 6 1864: The District of Baton Rouge and Port Hudson was established to comprise the territories of Baton Rouge, Plaquemine, Gaines Landing, Pass Manchac, De Sair and Port Hudson, Louisiana. Major-General Francis Jay Herron assumed command of the District of Baton Rouge and Port Hudson. The Sub-District of Baton of Baton Rouge was established in the District of Baton Rouge and Port Hudson. The Sub-District of Port Hudson was established in the District of Baton Rouge and Port Hudson.

October 30 1864: Brigadier-General William Plummer Benton assumed command of the District of Baton Rouge and Port Hudson, succeeding Major-General Francis Jay Herron.

December 26 1864: Brigadier-General George Leonard Andrews assumed command of the District of Baton Rouge and Port Hudson, succeeding Brigadier-General William Plummer Benton.

February 13 1865: The Sub-District of Baton Rouge was discontinued, and its territory transferred to the District of Baton Rouge and Port Hudson. The Sub-District of Port Hudson was discontinued, and its territory transferred to the District of Baton Rouge and Port Hudson. The District of Baton Rouge and Port Hudson was discontinued, and divided into the District of Baton Rouge and the District of Port Hudson

Sub-District of Baton Rouge

(Established, from District of Baton Rouge, August 6 1864-February 13 1865, discontinued, to District of Baton Rouge)

William Plummer Benton (August 6 1864-October 2 1864), William Jennings Landram (October 3 1864-December 2 1864), Joseph Bailey (December 3 1864-February 13 1865)

August 6 1864: The Sub-District of Baton of Baton Rouge was established in the District of Baton Rouge and Port Hudson. Brigadier-General William Plummer Benton retained command of the Sub-District of Baton Rouge.

October 3 1864: Colonel William Jennings Landram assumed command of the Sub-District of Baton Rouge, succeeding Brigadier-General William Plummer Benton.

December 3 1864: Brigadier-General Joseph Bailey assumed command of the Sub-District of Baton Rouge, succeeding Colonel William Jennings Landram.

February 13 1865: The Sub-District of Baton Rouge was discontinued, and its territory transferred to the District of Baton Rouge and Port Hudson.

Sub-District of Port Hudson

(Established, from District of Port Hudson, August 6 1864-February 13 1865, discontinued, to District of Port Hudson)

George Leonard Andrews (August 6 1864-December 25 1864), Charles Wilson Drew (December 26 1864-February 13 1865)

August 6 1864: The Sub-District of Port Hudson was established in the District of Baton Rouge and Port Hudson. Brigadier-General George Leonard Andrews assumed command of the Sub-District of Port Hudson, succeeding Brigadier-General John McNeil.

December 26 1864: Colonel Charles Wilson Drew assumed command of the Sub-District of Port Hudson, succeeding Brigadier-General George Leonard Andrews.

February 13 1865: The Sub-District of Port Hudson was discontinued, and its territory transferred to the District of Baton Rouge and Port Hudson.

District of West Florida and South Alabama

(Established, from District of West Florida, September 12 1864– March 1 1865, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Gordon Granger (September 12 1864– March 1 1865)

September 12 1864: The District of West Florida and South Alabama was established in the Department of the Gulf, comprising the territories of Mobile Bay and Pensacola, Florida. Major-General Gordon Granger assumed command of the District of West Florida and South Alabama. The Sub-District of West Florida was established in the District of West Florida and South Alabama.

March 1 1865: The District of West Florida and South Alabama transferred from the Department of the Gulf to the direct control of the Military Division of West Mississippi (Trans-Mississippi Military Division). The Sub-District of West Florida transferred with the District of West Florida and South Alabama from the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Sub-District of West Florida

(Established, from District of West Florida, September 12 1864-March 1 1865, transferred to Military Division of West Mississippi (Trans-Mississippi Military Division))

Alexander Asboth (September 12 1864-September 26 1864), Joseph Bailey (September 27 1864-November 24 1864), Thomas Jefferson McKean (November 25 1864-February 14 1865), Alexander Asboth (February 15 1865-March 1 1865)

September 12 1864: The Sub-District of West Florida was established in the District of West Florida and South Alabama. Brigadier-General Alexander Asboth retained command of the Sub-District of West Florida.

September 27 1864: Colonel Joseph Bailey assumed command of the Sub-District of West Florida, succeeding Brigadier-General Alexander Asboth.

November 25 1864: Brigadier-General Thomas Jefferson McKean assumed command of the Sub-District of West Florida, succeeding Brigadier-General Joseph Bailey.

February 15 1865: Brigadier-General Alexander Asboth assumed command of the Sub-District of West Florida, succeeding Brigadier-General Thomas Jefferson McKean.

March 1 1865: The Sub-District of West Florida transferred with the District of West Florida and South Alabama from the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

Northern District of Louisiana

(Established, from Military Division of West Mississippi (Trans-Mississippi Military Division, February 9 1865-May 17 1865, transferred to War Department)

Francis Jay Herron (February 9 1865-May 17 1865)

February 9 1865: The Northern District of Louisiana was established in the Department of the Gulf. Brigadier-General Francis Jay Herron assumed command of the Northern District of Louisiana.

February 11 1865: The District of Morganza transferred to the Northern District of Louisiana.

February 13 1865: The District of Baton Rouge was established and transferred to the Northern District of Louisiana. The District of Port Hudson was established and transferred to the Northern District of Louisiana in the Department of the Gulf.

May 17 1865: The Northern District of Louisiana transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf.

District of Morganza

(Transferred from Department of the Gulf, February 11 1865-May 17 1865, transferred to War Department)

Daniel Ullmann (February 11 1865-February 25 1865), Henry William Fuller (February 26 1865), Edmund Jackson Davis (February 27 1865-March 1 1865), Thomas Jefferson McKean (March 2 1865-April 26 1865), William Henry Dickey (April 27 1865-May 17 1865)

February 11 1865: The District of Morganza transferred to the Northern District of Louisiana. Brigadier-General Daniel Ullmann retained command of the District of Morganza.

February 26 1865: Colonel Henry William Fuller assumed command of the District of Morganza, succeeding Brigadier-General Daniel Ullmann.

February 27 1865: Brigadier-General Edmund Jackson Davis assumed command of the District of Morganza, succeeding Colonel William Henry Fuller.

March 2 1865: Brigadier-General Thomas Jefferson McKean assumed command of the District of Morganza, succeeding Brigadier-General Edmund Jackson Davis.

April 27 1865: Colonel William Henry Dickey assumed command of the District of Morganza, succeeding Brigadier-General Thomas Jefferson McKean.

May 17 1865: The District of Morganza transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Northern District of Louisiana.

District of Baton Rouge

(Established, from District of Baton Rouge and Port Hudson, February 13 1865-May 17 1865, transferred to War Department)

Joseph Bailey (February 13 1865-March 10 1865), Edmund Jackson Davis (March 11 1865-March 17 1865), John Giles Fonda (March 18 1865-March 22 1865), Michael Kelly Lawler (March 23 1865May 17 1865)

February 13 1865: The District of Baton Rouge and Port Hudson was discontinued, and divided into the District of Baton Rouge and the District of Port Hudson. The District of Baton Rouge was established and transferred to the Northern District of Louisiana. Brigadier-General Joseph Bailey retained command of the District of Baton Rouge.

March 11 1865: Brigadier-General Edmund Jackson Davis assumed command of the District of Baton Rouge, succeeding Brigadier-General Joseph Bailey.

March 18 1865: Colonel John Giles Fonda assumed command of the District of Baton Rouge, succeeding Brigadier-General Edmund Jackson Davis.

March 23 1865: Brigadier-General Michael Kelly Lawler assumed command of the District of Baton Rouge, succeeding Colonel John Giles Fonda.

May 17 1865: The District of Baton Rouge transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Northern District of Louisiana.

District of Port Hudson

(Established, from District of Baton Rouge and Port Hudson, February 13 1865-May 17 1865, transferred to War Department)

Charles Wilson Drew (February 13 1865-February 19 1865), Cyrus Hamlin (February 20 1865-May 17 1865)

February 13 1865: The District of Baton Rouge and Port Hudson was discontinued, and divided into the District of Baton Rouge and the District of Port Hudson. The District of Port Hudson was established and transferred to the Northern District of Louisiana in the Department of the Gulf. Colonel Charles Wilson Drew retained command of the District of Port Hudson.

February 20 1865: Brigadier-General Cyrus Hamlin assumed command of the District of Port Hudson, succeeding Colonel Charles Wilson Drew.

May 17 1865: The District of Port Hudson transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Northern District of Louisiana.

Southern District of Louisiana

(Established, February 11 1865-May 17 1865, transferred to War Department)

Thomas West Sherman (February 11 1865-May 17 1865)

February 11 1865: The Southern District of Louisiana was established. Brigadier-General Thomas West Sherman assumed command of the Southern District of Louisiana. The District of Carrollton transferred to the Southern District of Louisiana. The District of La Fourche transferred to the Southern District of Louisiana.

May 17 1865: The Southern District of Louisiana transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf.

District of Carrollton

(Transferred from Department of the Gulf, February 11 1865-May 17 1865, transferred to War Department)

Nelson Viall (February 11 1865-March 31 1865), William S Mudgett (April 1 1865-May 17 1865)

February 11 1865: The District of Carrollton transferred to the Southern District of Louisiana. Lieutenant-Colonel Nelson Viall retained command of the District of Carrollton.

April 1 1865: Colonel William S Mudgett assumed command of the District of Carrollton, succeeding Lieutenant-Colonel Nelson Viall.

May 17 1865: The District of Carrollton transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Southern District of Louisiana.

District of La Fourche

(Transferred from Department of the Gulf, February 11 1865-May 17 1865, transferred to War Department)

Robert Alexander Cameron (February 11 1865-May 17 1865)

February 11 1865: The District of La Fourche transferred to the Southern District of Louisiana. Brigadier-General Robert Alexander Cameron retained command of the District of La Fourche.

May 17 1865: The District of La Fourche transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Southern District of Louisiana.

District of West Florida

(Established, from District of West Florida and South Alabama, March 17 1865-May 17 1865, transferred to War Department)

Alexander Asboth (March 17 1865-May 17 1865)

March 17 1865: The District of West Florida and South Alabama was discontinued, and its territory transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Department of the Gulf as District of West Florida and the District of South Alabama. The District of West Florida was established in the Department of the Gulf. Brigadier-General Alexander Asboth assumed command of the District of West Florida.

May 17 1865: The District of West Florida transferred with the Department of the Gulf and transferred to the direct control of the War Department.

District of South Alabama

(From Military Division of West Mississippi (Trans-Mississippi Military Division), March 17 1865-May 17 1865, to District of Alabama)

Thomas Kilby Smith (March 17 1865-May 17 1865)

March 17 1865: The District of West Florida and South Alabama was discontinued. Its territory transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Department of the Gulf as the new District of West Florida and the District of South Alabama. The District of South Alabama was established in the Department of the Gulf. Brigadier-General Thomas Kilby Smith assumed command of the District of South Alabama.

May 17 1865: The District of South Alabama was discontinued, and its territory incorporated into the District of Alabama.

District of Bonnet Carré

(Established, March 27 1865-May 17 1865, transferred to War Department)

Charles Everett (March 27 1865-March 31 1865), James J Byrne (April 1 1865-May 17 1865)

March 27 1865: The District of Bonnet Carré was established in the Department of the Gulf. It comprised the territory between Bayou Manchac and Kennerville, Louisiana, west of New Orleans. Colonel Charles Everett assumed command of the District of Bonnet Carré.

April 1 1865: Colonel James J Byrne assumed command of the District of Bonnet Carré, succeeding Colonel Charles Everett.

May 17 1865: The District of Bonnet Carré transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division with the Department of the Gulf.

Army of the Gulf

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 7 1864-February 18 1865, transferred to Army of West Mississippi)

Nathaniel Prentiss Banks (May 7 1864-September 22 1864), Stephen Augustus Hurlbut (temporary September 23 1864-February 18 1865)

May 7 1864: The Army of the Gulf transferred with the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General Nathaniel Prentiss Banks retained command of the Army of the Gulf

June 11 1863: XIII Corps (Gulf) was discontinued, and most its forces assigned to form Reserve Corps (Gulf). Reserve Corps (Gulf) was established in the Department of the Gulf.

September 23 1864: Major-General Stephen Augustus Hurlbut assumed temporary command of the Army of the Gulf, succeeding Major-General Nathaniel Prentiss Banks.

November 7 1864: XIX Corps (Gulf) was discontinued. The elements of 1st Division and 2nd Division, known as ‘Detachment XIX Corps’ while serving in the Shenandoah Valley were officially designated XIX Corps (Shenandoah). The 3rd Division remained in Louisiana with the interim title XIX Corps (Gulf).

January 17 1865: Reserve Corps (Gulf) was discontinued.

February 18 1865: The Army of the Gulf transferred to the Army of West Mississippi. XIII Corps (Gulf) was established in the Army of the Gulf, composed largely of troops previously in Reserve Corps (Gulf).

XIX Corps Gulf

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 7 1864-November 7 1864, transferred to XIII Corps Shenandoah)

William Hemsley Emory (May 7 1864-July 1 1864), Benjamin Stone Roberts (temporary July 2 1864-July 5 1864), Michael Kelly Lawler (temporary July 6 1864), Joseph Jones Reynolds (July 7 1864-November 7 1864)

May 7 1864: XIX Corps (Gulf) transferred with the Army of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General William Hemsley Emory retained command of XIX Corps (Gulf).

July 2 1864: Brigadier-General Benjamin Stone Roberts assumed temporary command of XIX Corps (Gulf), succeeding Brigadier-General William Hemsley Emory.

July 6 1864: Brigadier-General Michael Kelly Lawler assumed temporary command of XIX Corps (Gulf), succeeding Brigadier-General Benjamin Stone Roberts.

July 7 1864: Major-General Joseph Jones Reynolds assumed command of XIX Corps (Gulf), succeeding Brigadier-General Michael Kelly Lawler.

November 7 1864: XIX Corps (Gulf) was discontinued. The elements of 1st Division and 2nd Division, known as ‘Detachment XIX Corps’ while serving in the Shenandoah Valley were officially designated XIX Corps (Shenandoah). The 3rd Division remained in Louisiana with the interim title XIX Corps (Gulf). Major-General Joseph Jones Reynolds retained interim command of XIX Corps (Gulf).

XIII Corps Gulf

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 7 1864-June 11 1864, discontinued, to Reserve Corps Gulf)

Michael Kelly Lawler (May 7 1864-May 8 1864), William Plummer Benton (May 9 1864-June 11 1864)

May 7 1864: XIII Corps (Gulf) transferred with the Army of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Michael Kelly Lawler retained command of XIII Corps (Gulf).

May 9 1864: Brigadier-General William Plummer Benton assumed command of XIII Corps (Gulf), succeeding Brigadier-General Michael Kelly Lawler.

June 11 1863: XIII Corps (Gulf) was discontinued, and most its forces assigned to form Reserve Corps (Gulf).

Reserve Corps Gulf

(Established, from XIII Corps Gulf, June 11 1864-January 17 1865, discontinued, to XIII Corps (Gulf) February 18 1865)

Gordon Granger (June 11 1864-January 17 1865)

June 11 1864: Reserve Corps (Gulf) was established in the Department of the Gulf. Major-General Gordon Granger assumed command of Reserve Corps (Gulf).

January 17 1865: Reserve Corps (Gulf) was discontinued.

February 18 1865: XIII Corps (Gulf) was established in the Army of the Gulf, composed largely of troops previously in Reserve Corps (Gulf).

Department of Arkansas

(Transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division), May 7 1864-March 21 1865, transferred to Military Division of the Missouri)

Nathan Kimball (temporary May 7 1864-May 21 1864), Frederick Steele (May 22 1864-December 21 1864), Joseph Jones Reynolds (December 22 1864-March 21 1865)

May 7 1864: The Department of Arkansas transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Nathan Kimball retained temporary command of the Department of Arkansas. The District of Northern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of the Frontier transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). The Army of Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division).

May 11 1864: The District of Little Rock was established in the Department of Arkansas.

May 22 1864: Major-General Frederick Steele assumed command of the Department of Arkansas, succeeding Brigadier-General Nathan Kimball.

June 1 1864: The District of Northern Arkansas was discontinued.

December 22 1864: Major-General Joseph Jones Reynolds assumed command of the Department of Arkansas, succeeding Major-General Frederick Steele.

February 1 1865: The District of the Frontier was discontinued.

February 4 1865: The District of Little Rock was discontinued.

March 21 1865: The Department of Arkansas transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri. The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Missouri.

District of Northern Arkansas

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 7 1864-June 1 1864, discontinued)

Robert Ramsey Livingston (May 7 1864-June 1 1864)

May 7 1864: The District of Northern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). Colonel Robert Ramsey Livingston retained command of the District of Northern Arkansas.

June 1 1864: The District of Northern Arkansas was discontinued.

District of the Frontier

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division) May 7 1864-February 1 1865, discontinued)

James Gilpatrick Blunt (May 7 1864-May 18 1864), John Milton Thayer (May 19 1864-February 1 1865)

May 7 1864: The District of the Frontier transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General James Gilpatrick Blunt retained command of the District of the Frontier.

May 19 1864: Brigadier-General John Milton Thayer assumed command of the District of the Frontier, succeeding Major-General James Gilpatrick Blunt.

February 1 1865: The District of the Frontier in the Department of Arkansas was discontinued.

District of Eastern Arkansas

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division) May 7 1864-March 21 1865, transferred to Military Division of the Missouri)

Napoleon Bonaparte Buford (May 7 1864-August 5 1864), William Crooks (temporary August 6 1864-September 27 1864), Napoleon Bonaparte Buford (September 28 1864-October 6 1864), William Crooks (temporary October 7 1864-October 18 1864), Napoleon Bonaparte Buford (October 19 1864-March 8 1865), Alexander McDowell McCook (March 9 1865-March 21 1865)

May 7 1864: The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Napoleon Bonaparte Buford retained command of the District of Eastern Arkansas.

August 6 1864: Colonel William Crooks assumed temporary command of the District of Eastern Arkansas, succeeding Brigadier-General Napoleon Bonaparte Buford.

September 28 1864: Brigadier-General Napoleon Bonaparte Buford assumed command of the District of Eastern Arkansas, succeeding Colonel William Crooks.

October 7 1864: Colonel William Crooks assumed temporary command of the District of Eastern Arkansas, succeeding Brigadier-General Napoleon Bonaparte Buford.

October 19 1864: Brigadier-General Napoleon Bonaparte Buford assumed command of the District of Eastern Arkansas, succeeding Colonel William Crooks.

March 9 1865: Major-General Alexander McDowell McCook assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Napoleon Bonaparte Buford.

March 21 1865: The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri.

District of Little Rock

(Established, May 11 1864-February 4 1865, discontinued)

Eugene Asa Carr (May 11 1864-February 4 1865)

May 11 1864: The District of Little Rock was established in the Department of Arkansas, comprising the posts of Little Rock, Lewisburg and Pine Bluff. Brigadier-General Eugene Asa Carr assumed command of the District of Little Rock.

February 4 1865: The District of Little Rock in the Department of Arkansas was discontinued.

Army of Arkansas

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division) May 7 1864-March 21 1865, transferred to Military Division of the Missouri)

Frederick Steele (May 7 1864-December 21 1864), Joseph Jones Reynolds (December 22 1864-March 21 1865)

May 7 1864: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General Frederick Steele retained command of the Army of Arkansas.

December 22 1864: Major-General Joseph Jones Reynolds assumed command of the Army of Arkansas, succeeding Major-General Frederick Steele.

March 21 1865: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Missouri. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Missouri.

VII Corps Arkansas

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division) May 7 1864-March 21 1865, transferred to Military Division of the Missouri)

Nathan Kimball (temporary May 7 1864-May 21 1864), Frederick Steele (May 22 1864-December 21 1864), Joseph Jones Reynolds (December 22 1864-March 21 1865)

May 7 1864: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Nathan Kimball retained temporary command of VII Corps (Arkansas),

May 22 1864: Major-General Frederick Steele assumed command of VII Corps (Arkansas), succeeding Brigadier-General Nathan Kimball.

December 22 1864: Major-General Joseph Jones Reynolds assumed command of VII Corps (Arkansas), succeeding Major-General Frederick Steele.

March 21 1865: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Missouri.

Department of the Missouri

(Transferred t Military Division of West Mississippi (Trans-Mississippi Military Division), May 27 1864-January 30 1865, transferred to Military Division of the Missouri)

William Starke Rosecrans (May 27 1864-December 1 1864 interim to December 8 1864), Grenville Mellen Dodge (December 2 1864-January 30 1865)

May 27 1864: The Department of the Missouri transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of St Louis transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Southwest Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Central Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). The District of Rolla transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). The Distinct of North Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General William Starke Rosecrans retained command of the Department of the Missouri.

August 18 1864: The southern border of the District of Southwest Missouri was redefined as the Missouri-Arkansas state line.

December 2 1864: Major-General Grenville Mellen Dodge was appointed to command the Department of the Missouri, arriving on 9th December 1864, to succeed Major-General William Starke Rosecrans.

December 9 1864: Major-General Grenville Mellen Dodge arrived to command the Department of the Missouri, succeeding Major-General William Starke Rosecrans.

December 26 1864: The northern border of the District of Southwest Missouri was re-defined as the Osage River.

January 30 1865: The Military Division of the Missouri was established. It included the Department of the Northwest and the Department of the Missouri. The Department of the Missouri transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Military Division of the Missouri. The District of St Louis transferred with the Department of the Missouri to the Military Division of the Missouri. The District of Southwest Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. The District of Central Missouri transferred with the Department of the Missouri to the Military Division of the Missouri. The District of Rolla transferred with the Department of the Missouri to the Military Division of the Missouri. The District of North Missouri transferred with the Department of the Missouri to the Military Division of the Missouri.

District of St Louis

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 27 1864-January 30 1865, transferred to Military Division of the Missouri)

Vacant (May 27 1864-July 23 1864), Alfred Pleasonton (July 24 1864-December 8 1864), George Day Wagner (December 9 1864-January 30 1865)

May 27 1864: The District of St Louis transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). Command of the District of St Louis remained vacant.

July 24 1864: Major-General Alfred Pleasonton assumed command of the District of St Louis after a vacancy.

December 9 1864: Brigadier-General George Day Wagner assumed command of the District of St Louis, succeeding Major-General Alfred Pleasonton.

January 30 1865: The District of St Louis transferred with the Department of the Missouri to the Military Division of the Missouri.

District of Southwest Missouri

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 27 1864-January 30 1865, transferred to Military Division of the Missouri)

John Benjamin Sanborn (May 27 1864-December 8 1864), Joseph Jackson Gravely (temporary December 9 1864-January 8 1865), John Benjamin Sanborn (January 9 1865-January 30 1865)

May 27 1864: The District of Southwest Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General John Benjamin Sanborn retained command of the District of Southwest Missouri.

August 18 1864: The southern border of the District of Southwest Missouri was redefined as the Missouri-Arkansas state line.

December 9 1864: Colonel Joseph Jackson Gravely assumed temporary command of the District of Southwest Missouri, succeeding Brigadier-General John Benjamin Sanborn.

December 26 1864: The northern border of the District of Southwest Missouri was re-defined as the Osage River.

January 9 1865: Brigadier-General John Benjamin Sanborn assumed command of the District of Southwest Missouri, succeeding Colonel Joseph Jackson Gravely.

January 30 1865: The District of Southwest Missouri transferred with the Department of the Missouri to the Military Division of the Missouri.

District of Central Missouri

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 27 1864-January 30 1865, transferred to Military Division of the Missouri)

Egbert Benson Brown (May 27 1864-July 23 1864), Alfred Pleasonton (July 24 1864-September 2 1864), Egbert Benson Brown (September 3 1864-November 2 1864), John Finis Philips (November 3 1864-February 26 1865), John McNeil (February 27 1865-April 11 1865), Chester Harding (April 25 1865-January 30 1865)

May 27 1864: The District of Central Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Egbert Benson Brown retained command of the District of Central Missouri.

July 24 1864: Major-General Alfred Pleasonton assumed command of the District of Central Missouri, succeeding Brigadier-General Egbert Benson Brown.

September 3 1864: Brigadier-General Egbert Benson Brown assumed command of the District of Central Missouri, succeeding Major-General Alfred Pleasonton.

November 3 1864: Colonel John Finis Philips assumed command of the District of Central Missouri, succeeding Brigadier-General Egbert Benson Brown.

January 30 1865: The District of Central Missouri transferred with the Department of the Missouri to the Military Division of the Missouri.

February 27 1865: Brigadier-General John McNeil assumed command of the District of Central Missouri, succeeding Colonel John Finis Philips.

April 12 1865: State Colonel Chester Harding assumed command of the District of Central Missouri, succeeding Brigadier-General John McNeil.

January 30 1865: The District of Central Missouri transferred with the Department of the Missouri to the Military Division of the Missouri.

District of Rolla

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 27 1864-January 30 1865, transferred to Military Division of the Missouri)

Odon Guitar (May 27 1864-August 22 1864), John McNeil (August 23 1864-October 3 1864), Albert Sigel (October 4 1864-November 2 1864), John Finis Philips (November 3 1864-November 27 1864), Albert Sigel (November 28 1864-December 1 1864), Edwin C Catherwood (December 2 1864-January 4 1865), Egbert Benson Brown (January 5 1865-January 30 1865)

May 27 1864: The District of Rolla transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). Colonel Odon Guitar retained command of the District of Rolla.

August 23 1864: Brigadier-General John McNeil assumed command of the District of Rolla, succeeding State Brigadier-General Odon Guitar.

October 4 1864: State Colonel Albert Sigel assumed temporary command of the District of Rolla, succeeding Brigadier-General John McNeil.

November 3 1864: Colonel John Finis Philips assumed command of the District of Rolla, succeeding Colonel Albert Sigel.

November 28 1864: Colonel Albert Sigel assumed temporary command of the District of Rolla, succeeding State Colonel John Finis Phillips.

December 2 1864: Missouri State Colonel Edwin C Catherwood assumed temporary command of the District of Rolla, succeeding Colonel Albert Sigel.

January 5 1865: Brigadier-General Egbert Benson Brown assumed command of the District of Rolla, succeeding Colonel Edward C Catherwood.

January 30 1865: The District of Rolla transferred with the Department of the Missouri to the Military Division of the Missouri.

District of North Missouri

(Transferred to Military Division of West Mississippi (Trans-Mississippi Military Division), May 27 1864-January 30 1865, transferred to Military Division of the Missouri)

Clinton Bowen Fisk (May 27 1864-January 30 1865)

May 27 1864: The District of North Missouri transferred with the Department of the Missouri to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Clinton Bowen Fisk retained command of the District of North Missouri.

January 30 1865: The District of North Missouri transferred with the Department of the Missouri to the Military Division of the Missouri.

Department of the Mississippi

(Established, from Department of the Tennessee, November 28 1864-June 5 1865, discontinued)

Napoleon Jackson Tecumseh Dana (November 28 1864-April 30 1865 interim to May 13 1865), Gouverneur Kemble Warren (May 1 1865-June 5 1865)

November 28 1864: The Department of the Mississippi was established and transferred to the Military Division of West Mississippi (Trans-Mississippi Military Division). It comprised the state of Mississippi and the parts of Tennessee west of the Tennessee River taken from the discontinued Department of the Tennessee. The District of Vicksburg transferred from the Department of the Tennessee to the Department of the Mississippi. The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi. Brigadier-General Napoleon Jackson Tecumseh Dana was appointed to command the Department of the Mississippi, arriving on 8th December 1864.

December 8 1864: Brigadier-General Napoleon Jackson Tecumseh Dana arrived to command the Department of the Mississippi.

January 3 1865: The District of Natchez was established in the Department of the Mississippi, comprising the territories east and west of the Mississippi River north of the Red River and south of the 32nd parallel.

January 17 1865: The territories of Georgia, Alabama and Mississippi controlled by the Army of the Cumberland were transferred from the Department of the Mississippi to the Department of the Cumberland.

February 10 1865: The District of West Tennessee transferred from the Department of the Mississippi to the Department of the Cumberland. It comprised the territory of Tennessee west of the Tennessee River.

May 1 1865: Major-General Gouverneur Kemble Warren was appointed to command the Department of the Mississippi, arriving on 14th May 1865.

May 14 1865: Major-General Gouverneur Kemble Warren arrived to command the Department of the Mississippi, succeeding Major-General Napoleon Jackson Tecumseh Dana.

May 17 1865: The District of Mississippi was established in the Department of Gulf, comprising the state of Mississippi transferred from the Department of the Mississippi.

June 3 1865: The District of Natchez was discontinued.

June 5 1865: The Department of the Mississippi was discontinued. The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf.

District of West Tennessee

(Transferred, from Department of the Tennessee, November 28 1864-February 10 1865, transferred to Department of the Cumberland)

Napoleon Jackson Tecumseh Dana (November 28 1864-December 7 1864), James Clifford Veatch (December 8 1864-February 2 1865), Benjamin Stone Roberts (February 3 1865-February 10 1865)

November 28 1864: The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi. It comprised the territory of Tennessee west of the Tennessee River. Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of the District of West Tennessee, succeeding Brigadier-General Benjamin Henry Grierson.

December 8 1864: Brigadier-General James Clifford Veatch assumed command of the District of West Tennessee, succeeding Brigadier-General Napoleon Jackson Tecumseh Dana.

February 3 1865: Brigadier-General Benjamin Stone Roberts arrived to command the District of West Tennessee, succeeding Brigadier-General John Clifford Veatch.

February 10 1865: The District of West Tennessee transferred from the Department of the Mississippi to the Department of the Cumberland.

District of Vicksburg

(Transferred from Department of the Tennessee, November 28 1864-June 5 1865, transferred to Department of the Gulf)

Napoleon Jackson Tecumseh Dana (November 28 1864-December 7 1864), Cadwallader Colden Washburn (December 8 1864-February 10 1865), Morgan Lewis Smith (February 11 1865-June 5 1865)

November 28 1864: The District of Vicksburg, comprising the posts of Vicksburg, Natchez, and Davis Bend, transferred from the Department of the Tennessee to the Department of the Mississippi. Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of the District of Vicksburg, succeeding Brigadier-General Morgan Lewis Smith.

December 8 1864: Major-General Cadwallader Colden Washburn assumed command of the District of Vicksburg, succeeding Brigadier-General Napoleon Jackson Tecumseh Dana.

January 3 1865: The District of Natchez was established in the Department of the Mississippi, comprising the territories east and west of the Mississippi River north of the Red River and south of the 32nd parallel. It was detached from the District of Vicksburg.

February 11 1865: Brigadier-General Morgan Lewis Smith assumed command of the District of Vicksburg, succeeding Brigadier-General Cadwallader Colden Washburn.

June 5 1865: The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf

District of Natchez

(Established, January 3 1865-June 3 1865, discontinued)

John Wynn Davidson (January 3 1865-June 3 1865)

January 3 1865: The District of Natchez was established in the Department of the Mississippi, comprising the territories east and west of the Mississippi River north of the Red River and south of the 32nd parallel. It was detached from the District of Vicksburg. Brigadier-General John Wynn Davidson assumed command of the District of Natchez.

June 3 1865: The District of Natchez was discontinued.

District of Key West and Tortugas

(Transferred from Department of the Gulf, February 10 1865-May 17 1865, discontinued)

John Newton (February 10 1865-May 17 1865)

February 10 1865: The District of Key West and Tortugas transferred from the Department of the Gulf and transferred directly to the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General John Newton retained command of the District of Key West and Tortugas.

May 17 1865: The District of Key West and Tortugas was discontinued, and its territory assigned to the Department of the Gulf.

District of West Florida and South Alabama

(Transferred from Department of the Gulf, March 1 1865-March 17 1865, discontinued, to District of West Florida and District of South Alabama)

Gordon Granger (March 1 1865-March 17 1865)

March 1 1865: The District of West Florida and South Alabama transferred from the Department of the Gulf to the direct control of the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General Gordon Granger retained command of the District of West Florida and South Alabama. The Sub-District of West Florida transferred with the District of West Florida and South Alabama from the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division).

March 17 1865: The District of West Florida and South Alabama was discontinued. Its territory transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) to the Department of the Gulf as the new District of West Florida and the District of South Alabama. The Sub-District of West Florida was discontinued, and its territory assigned to the District of West Florida.

Sub-District of West Florida

(Transferred from Department of the Gulf, March 1 1865-March 17 1865, discontinued, to District of West Florida)

Alexander Asboth (March 1 1865-March 17 1865)

March 1 1865: The Sub-District of West Florida transferred with the District of West Florida and South Alabama from the Department of the Gulf to the Military Division of West Mississippi (Trans-Mississippi Military Division). Brigadier-General Alexander Asboth retained command of the Sub-District of West Florida.

March 17 1865: The Sub-District of West Florida was discontinued, and its territory assigned to the District of West Florida.

Army of West Mississippi

(Established, February 18 1865-June 3 1865, discontinued)

Edward Richard Sprigg Canby (February 18 1865-June 3 1865)

February 18 1865: The Army of West Mississippi was established in the Military Division of West Mississippi (Trans-Mississippi Military Division). Major-General Edward Richard Sprigg Canby assumed command of the Army of West Mississippi. The Army of the Gulf transferred to the Army of West Mississippi. XIII Corps (Gulf) was established in the Army of the Gulf, composed largely of troops previously in Reserve Corps (Gulf). The Detachment Army of the Tennessee was discontinued, and reverted to the name XVI Corps (Gulf), and transferred to the Army of the Gulf. XVI Corps (Gulf) was established in the Army of the Gulf.

May 17 1865: The Military Division of West Mississippi (Trans-Mississippi Military Division) (also referred to as the Trans-Mississippi Division) was officially discontinued to be replaced by the Military Division of the Southwest. However, it remained in interim existence until finally disbanded officially on 1st June 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) retained interim responsibility for the Army of West Mississippi and the Army of the Gulf.

June 3 1865: The Army of West Mississippi was discontinued. The Army of the Gulf transferred from the Army of West Mississippi to the Department of the Gulf. XIII Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.  XVI Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.

Army of the Gulf

(Transferred from Department of the Gulf, February 18 1865-June 3 1865, transferred to Department of the Gulf)

Stephen Augustus Hurlbut (February 18 1865-April 21 1865), Nathaniel Prentiss Banks (April 22 1865)

February 18 1865: The Army of the Gulf transferred to the Army of West Mississippi. Major-General Stephen Augustus Hurlbut retained command of the Army of the Gulf. XIII Corps (Gulf) was established in the Army of the Gulf, composed largely of troops previously in Reserve Corps (Gulf). The Detachment Army of the Tennessee was discontinued, and reverted to the name XVI Corps (Gulf), and transferred to the Army of the Gulf. XVI Corps (Gulf) was established in the Army of the Gulf.

April 22 1865: Major-General Nathaniel Prentiss Banks assumed command of the Army of the Gulf, succeeding Major-General Stephen Augustus Hurlbut.

May 17 1865: The Military Division of West Mississippi (Trans-Mississippi Military Division) (also referred to as the Trans-Mississippi Division) was officially discontinued to be replaced by the Military Division of the Southwest. However, it remained in interim existence until finally disbanded officially on 1st June 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) retained interim responsibility for the Army of West Mississippi and the Army of the Gulf.

June 3 1865: The Army of the Gulf transferred from the Army of West Mississippi to the Department of the Gulf. XIII Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.  XVI Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.

XIII Corps Gulf

(Established, from Reserve Corps (Gulf), February 18 1865-June 3 1865, transferred to Department of the Gulf)

Gordon Granger (February 18 1865-June 3 1865)

February 18 1865: XIII Corps (Gulf) was established in the Army of the Gulf, composed largely of troops previously in Reserve Corps (Gulf). Major-General Gordon Granger assumed command of XIII Corps (Gulf).

June 3 1865: XIII Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.

XVI Corps Gulf

(Established, from Detachment Army of the Tennessee, February 18 1865-June 3 1865, transferred to Department of the Gulf)

Andrew Jackson Smith (February 18 1865-June 3 1865)

February 18 1865: The Detachment Army of the Tennessee was discontinued, and reverted to the name XVI Corps (Gulf), and transferred to the Army of the Gulf. XVI Corps (Gulf) was established in the Army of the Gulf. Major-General Andrew Jackson Smith retained command of XVI Corps (Gulf).

June 3 1865: XVI Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.

Department of the Gulf

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued, to Department of Louisiana, Department of Mississippi, Department of Florida, Department of Alabama, and Department of Texas)

Nathaniel, Prentiss Banks (May 17 1865 interim to June 2 1865), Edward Richard Sprigg Canby (June 3 1865-June 27 1865)

May 17 1865: The Military Division of West Mississippi (Trans-Mississippi Military Division) (also referred to as the Trans-Mississippi Division) was officially discontinued to be replaced by the Military Division of the Southwest. However, it remained in interim existence until finally disbanded officially on 1st June 1865. The Military Division of West Mississippi (Trans-Mississippi Military Division) retained interim responsibility for the Army of West Mississippi and the Army of the Gulf. The Department of the Gulf became temporarily autonomous pending transfer to the Military Division of the Southwest. The parts of Florida in the Department of the South were transferred to the Department of the Gulf. The parts of Mississippi and Alabama previously occupied by the Army of the Cumberland and temporarily controlled by the Department of the Cumberland were transferred to the Department of the Gulf. The Department of the Gulf was separated from the authority of the discontinued Military Division of West Mississippi (Trans-Mississippi Military Division) and became temporarily autonomous. It took responsibility for Mississippi, Alabama and Florida. Major-General Nathaniel Prentiss Banks retained interim command of the Department of the Gulf, pending the arrival of Major-General Edward Richard Sprigg Canby. Major-General Edward Richard Sprigg Canby was appointed to command the Department of the Gulf, arriving on 3rd June 1865 to succeed Major-General Nathaniel Prentiss Banks. The District of Alabama was established and transferred to the Department of the Gulf. The District of Mississippi was established in the Department of Gulf, comprising the state of Mississippi transferred from the Department of the Mississippi. The Northern District of Louisiana transferred with the Department of the Gulf. The District of Morganza transferred with the Department of the Gulf. The District of Baton Rouge transferred with the Department of the Gulf. The District of Port Hudson transferred with the Department of the Gulf. The Southern District of Louisiana transferred with the Department of the Gulf. The District of Carrollton transferred with the Department of the Gulf. The District of La Fourche transferred with the Department of the Gulf. The District of West Florida transferred with the Department of the Gulf. The District of Bonnet Carré transferred with the Department of the Gulf.

May 29 1865: The District of East Louisiana was established in the Department of the Gulf.

June 3 1865: Major-General Edward Richard Sprigg Canby arrived to command the Department of the Gulf, succeeding Major-General Nathaniel Prentiss Banks. The Army of the Gulf transferred from the Army of West Mississippi to the Department of the Gulf. XIII Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf. XVI Corps (Gulf) transferred with the Army of the Gulf from the discontinued Army of West Mississippi to the Department of the Gulf.

June 3 1865: The District of Florida transferred from the Department of the South to the Department of the Gulf. It comprised the state of Florida. The District of West Florida was discontinued, and its territory incorporated in the District of Florida. The Sub-District of Mobile was established in the District of Alabama.

June 5 1865: The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf.

June 22 1865: The District of Vicksburg was discontinued.

June 24 1865: The District of Port Hudson was discontinued.

June 27 1865: The Department of the Gulf was discontinued, and its territory incorporated into the Department of Louisiana, the Department of Mississippi, the Department of Alabama, the Department of Florida and the Department of Texas. The Army of the Gulf was discontinued. XIII Corps (Gulf) transferred from the discontinued Army of the Gulf to the Military Division of the Gulf. XVI Corps (Gulf) transferred from the discontinued Army of the Gulf to the Military Division of the Gulf. The District of Florida was discontinued, and its territory transferred to the Department of Florida. The District of Bonnet Carré was discontinued. The District of Carrollton was discontinued. The District of La Fourche was discontinued. The District of Morganza was discontinued. The Northern District of Louisiana was discontinued. The Southern District of Louisiana was discontinued. The District of Baton Rouge transferred from the Department of the Gulf to the Department of Louisiana. The District of East Louisiana was discontinued. The Western District of Louisiana was established in the Department of Louisiana. The Department of Mississippi was established and transferred to the Military Division of the Gulf. The state of Mississippi transferred from the Department of the Gulf to the Department of Mississippi. The District of Mississippi was discontinued. The District of Alabama was discontinued. The Sub-District of Mobile was discontinued, and incorporated into the Department of Alabama.

Northern District of Louisiana

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued, to Department of Louisiana)

Francis Jay Herron (May 17 1865-June 27 1865)

May 17 1865: The Northern District of Louisiana transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Department of the Gulf. The District of Morganza transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Northern District of Louisiana. The District of Baton Rouge transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Northern District of Louisiana. The District of Port Hudson transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Northern District of Louisiana. Major-General Francis Jay Herron retained command of the Northern District of Louisiana.

June 7 1865: Command of the Northern District of Louisiana became vacant.

June 27 1865: The Northern District of Louisiana was discontinued. The District of Morganza was discontinued. The District of Baton Rouge transferred from the Department of the Gulf to the Department of Louisiana.

District of Morganza

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued)

William Henry Dickey (May 17 1865-June 27 1865)

May 17 1865: The District of Morganza transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Northern District of Louisiana. Colonel William Henry Dickey retained command of the District of Morganza.

June 27 1865: The District of Morganza was discontinued.

District of Baton Rouge

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, transferred to Department of Louisiana)

Michael Kelly Lawler (May 17 1865-May 29 1865), John Giles Fonda (May 30 1865-June 27 1865)

May 17 1865: The District of Baton Rouge transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Northern District of Louisiana. Brigadier-General Michael Kelly Lawler retained command of the District of Baton Rouge.

May 30 1865: Colonel John Giles Fonda assumed command of the District of Baton Rouge, succeeding Brigadier-General Michael Kelly Lawler.

June 27 1865: The District of Baton Rouge transferred from the Department of the Gulf to the Department of Louisiana.

District of Port Hudson

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 24 1865, discontinued)

Cyrus Hamlin (May 17 1865-June 24 1865)

May 17 1865: The District of Port Hudson transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Northern District of Louisiana. Brigadier-General Cyrus Hamlin retained command of the District of Port Hudson.

June 24 1865: The District of Port Hudson was discontinued.

Southern District of Louisiana

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued)

Thomas West Sherman (May 17 1865-June 27 1865)

May 17 1865: The Southern District of Louisiana transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Department of the Gulf. The District of Carrollton transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Southern District of Louisiana. The District of La Fourche transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Southern District of Louisiana. Brigadier-General Thomas West Sherman retained command of the Southern District of Louisiana.

June 27 1865: The Southern District of Louisiana was discontinued. The District of Carrollton was discontinued. The District of La Fourche was discontinued.

District of Carrollton

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued)

William S Mudgett (May 17 1865-June 27 1865)

May 17 1865: The District of Carrollton transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Southern District of Louisiana. Colonel William S Mudgett retained command of the District of Carrollton.

June 27 1865: The District of Carrollton was discontinued.

District of La Fourche

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued)

Robert Alexander Cameron (May 17 1865-June 27 1865)

May 17 1865: The District of La Fourche transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Southern District of Louisiana. Brigadier-General Robert Alexander Cameron retained command of the District of La Fourche.

June 22 1865: Command of the District of La Fourche became vacant with the resignation of Brigadier-General Robert Alexander Cameron.

June 27 1865: The District of La Fourche was discontinued.

District of West Florida

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 3 1865, discontinued, to District of Florida)

Alexander Asboth (May 17 1865-June 3 1865)

May 17 1865: The District of West Florida transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Department of the Gulf. Brigadier-General Alexander Asboth retained command of the District of West Florida.

June 3 1865: The District of West Florida was discontinued, and its territory incorporated in the District of Florida.

District of Bonnet Carré

(Transferred from Military Division of West Mississippi (Trans-Mississippi Military Division), May 17 1865-June 27 1865, discontinued)

James J Byrne (May 17 1865-June 27 1865)

May 17 1865: The District of Bonnet Carré transferred from the Military Division of West Mississippi (Trans-Mississippi Military Division) with the Department of the Gulf. Colonel James J Byrne retained command of the District of Bonnet Carré.

June 27 1865: The District of Bonnet Carré was discontinued.

District of Alabama

(Established, from District of South Alabama, May 17 1865-June 27 1865, discontinued, to Department of Alabama)

Andrew Jackson Smith (May 17 1865-June 27 1865)

May 17 1865: The District of South Alabama was discontinued, and its territory incorporated into the District of Alabama. The District of Alabama was established in the Department of the Gulf, and comprised the state of Alabama. Major-General Andrew Jackson Smith assumed command of the District of Alabama.

June 3 1865: The Sub-District of Mobile was established in the District of Alabama. It comprised the territory round Mobile, Alabama.

June 27 1865: The District of Alabama was discontinued. The Department of Alabama was established, comprising the state of Alabama. It transferred to the Military Division of the Tennessee. The Sub-District of Mobile was discontinued, and incorporated into the Department of Alabama.

Sub-District of Mobile

(Established, June 3 1865-June 27 1865, discontinued, to Department of Alabama)

Christopher Columbus Andrews (June 3 1865-June 11 1865), Thomas Kilby Smith (June 12 1865-June 27 1865)

June 3 1865: The Sub-District of Mobile was established in the District of Alabama. It comprised the territory round Mobile, Alabama. Brigadier-General Christopher Columbus Andrews assumed command of the Sub-District of Mobile.

June 12 1865: Brigadier-General Thomas Kilby Smith assumed command of the Sub-District of Mobile, succeeding Brigadier-General Christopher Columbus Andrews.

June 27 1865: The Sub-District of Mobile was discontinued, and incorporated into the Department of Alabama.

District of Mississippi

(Established, May 17 1865-June 27 1865, discontinued, to Department of Mississippi)

Peter Joseph Osterhaus (May 17 1865-June 27 1865)

May 17 1865: The District of Mississippi was established in the Department of Gulf, comprising the state of Mississippi transferred from the Department of the Mississippi. Major-General Peter Joseph Osterhaus assumed command of the District of Mississippi.

June 27 1865: The Department of Mississippi was established and transferred to the Military Division of the Gulf. The state of Mississippi transferred from the Department of the Gulf to the Department of Mississippi. The District of Mississippi was discontinued, and its territory transferred to the Department of Mississippi in the Military Division of the Gulf.

District of East Louisiana

(Established, May 29 1865-June 27 1865, discontinued, to Eastern District of Louisiana)

Michael Kelly Lawler (May 29 1865-June 27 1865)

May 29 1865: The District of East Louisiana was established in the Department of the Gulf. Brigadier-General Michael Kelly Lawler assumed command of the District of East Louisiana.

June 27 1865: The District of East Louisiana was discontinued.

District of Florida

(Transferred from Department of the South, June 3 1865-June 27 1865, discontinued, to Department of Florida)

Alexander Asboth (June 3 1865-June 27 1865)

June 3 1865: The District of West Florida was discontinued, and its territory incorporated in the District of Florida. The District of Florida transferred from the Department of the South to the Department of the Gulf. It comprised the state of Florida. Brigadier-General Alexander Asboth assumed command of the District of Florida, succeeding Brigadier-General Israel Vogdes.

June 27 1865: The District of Florida was discontinued, and its territory transferred to the Department of Florida.

District of Vicksburg

(Transferred from Department of the Mississippi, June 5 1865-June 22 1865, discontinued)

Morgan Lewis Smith (June 5 1865-June 22 1865)

June 5 1865: The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf. Major-General Morgan Lewis Smith retained command of the District of Vicksburg.

June 22 1865: The District of Vicksburg was discontinued.

Army of the Gulf

(Transferred from Army of West Mississippi, June 3 1865-June 27 1865, discontinued)

Edward Richard Sprigg Canby (June 3 1865-June 27 1865)

June 3 1865: The Army of the Gulf transferred from the Army of West Mississippi to the Department of the Gulf. XIII Corps (Gulf) transferred with the Army of the Gulf to the Department of the Gulf. XVI Corps (Gulf) transferred with the Army of the Gulf to the Department of the Gulf. Major-General Edward Richard Sprigg Canby assumed command of the Army of the Gulf, succeeding Major-General Benjamin Franklin Butler.

June 27 1865: The Army of the Gulf was discontinued. XIII Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf. XVI Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf.

XIII Corps Gulf

(Transferred from Army of West Mississippi, June 3 1865-June 27 1865, transferred to Military Division of the Gulf)

Gordon Granger (June 3 1865-June 27 1865)

June 3 1865: XIII Corps (Gulf) transferred with the Army of the Gulf from the Army of West Mississippi to the Department of the Gulf. Major-General Gordon Granger retained command of XIII Corps (Gulf).

June 27 1865: XIII Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf.

XVI Corps Gulf

(Transferred from Army of West Mississippi, June 3 1865-June 27 1865, transferred to Military Division of the Gulf)

Andrew Jackson Smith (June 3 1865-June 27 1865)

XIVI Corps (Gulf) transferred with the Army of the Gulf from the Army of West Mississippi to the Department of the Gulf. Major-General Andrew Jackson Smith retained command of XVI Corps (Gulf).

June 27 1865: XVI Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf.

Military Division of the Southwest

(Established, May 17 1865-June 27 1865, discontinued)

Philip Henry Sheridan (May 17 1865-June 27 1865)

May 17 1865: The Military Division of the Southwest was established to comprise parts of the Department of Arkansas and the former Department of the Gulf. The states of Louisiana and Texas were detached from the Department of the Gulf and assigned to the Military Division of the Southwest. The Department of Arkansas transferred from the Military Division of the Missouri to the Military Division of the Southwest. Major-General Philip Henry Sheridan was appointed to command the Military Division of the Southwest, arriving on 29th May 1865.

May 23 1865: XXV Corps (Southwest) transferred from the Army of the James to the Military Division of the Southwest.

May 29 1865: Major-General Philip Henry Sheridan arrived to command the Military Division of the Southwest.

June 3 1865: The District of South Kansas was discontinued.

June 4 1865: XXV Corps (Southwest) was discontinued.

June 5 1865: The District of Eastern Arkansas was discontinued.

June 27 1865: The Military Division of the Southwest was discontinued. The Department of Arkansas transferred from the Military Division of the Southwest to the Military Division of the Mississippi. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Mississippi.

Department of Arkansas

(Transferred from Military Division of the Missouri, May 17 1865-June 27 1865, transferred to Military Division of the Mississippi)

Joseph Jones Reynolds (May 17 1865-June 27 1865)

May 17 1865: The Department of Arkansas transferred from the Military Division of the Missouri to the Military Division of the Southwest. Major-General Joseph Jones Reynolds retained command of the Department of Arkansas. The District of South Kansas transferred with the Department of Arkansas to the Military Division of the Southwest. The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Southwest.

June 3 1865: The District of South Kansas was discontinued.

June 5 1865: The District of Eastern Arkansas was discontinued.

June 27 1865: The Department of Arkansas transferred from the Military Division of the Southwest to the Military Division of the Mississippi. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Mississippi. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Mississippi.

District of South Kansas

(Transferred from Military Division of the Missouri, May 17 1865-June 3 1865, discontinued)

James Gilpatrick Blunt (May 17 1865-June 3 1865)

May 17 1865: The District of South Kansas transferred with the Department of Arkansas to the Military Division of the Southwest. Major-General James Gilpatrick Blunt retained command of the District of South Kansas.

June 3 1865: The District of South Kansas was discontinued.

District of Eastern Arkansas

(Transferred from Military Division of the Missouri, May 17 1865-June 5 1865)

John Milton Thayer (May 17 1865-June 5 1865)

May 17 1865: The District of Eastern Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. Brigadier-General John Milton Thayer assumed command of the District of Eastern Arkansas.

June 5 1865: The District of Eastern Arkansas was discontinued.

Army of Arkansas

(Transferred from Military Division of the Missouri, May 17 1865-June 27 1865, transferred to Military Division of the Mississippi)

Joseph Jones Reynolds (May 17 1865-June 27 1865)

May 17 1865: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Southwest. Major-General Joseph Jones Reynolds retained command of the Army of Arkansas. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Southwest.

June 27 1865: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Mississippi. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Mississippi.

VII Corps Arkansas

(Transferred from Military Division of the Missouri, May 17 1865-June 27 1865, transferred to Military Division of the Mississippi)

Joseph Jones Reynolds (May 17 1865-June 27 1865)

May 17 1865: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Southwest. Major-General Joseph Jones Reynolds retained command of VII Corps (Arkansas).

June 27 1865: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Mississippi.

XXV Corps Southwest)

(Transferred from Army of the James, May 23 1865-June 4 1865, discontinued)

Godfrey Weitzel (May 23 1865-June 4 1865)

May 23 1865: XXV Corps transferred from the Army of the James to the Military Division of the Southwest. Major-General Godfrey Weitzel retained command of XXV Corps (Southwest).

June 4 1865: XXV Corps (Southwest) was discontinued.

Part 3e: Atlantic Coast Theatre

Summary

This theatre broadly covers the states of Florida, Georgia, South Carolina, North Carolina and adjacent operational regions.

Activity in the theatre grew by the gradual acquisition of bases along the coasts of Florida, Georgia, South Carolina, and North Carolina. The western parts of Florida passed between this theatre and the Gulf Coast Theatre, depending on operational requirements. Being isolated by sea from the contiguous mass of Union territory, the military outposts in this theatre were enabled and sustained by the Navy. The aim was to secure bases of operations to maintain the naval blockade and for the army to advance to capture ports that would provide secure supply lines and into the hinterland. It was not until mid-1864 for Virginia, the end of 1864 for Georgia and South Carolina, and early 1865 for North Carolina that these operational territories meshed with the forces advancing overland from the north, west and south.

The Department of North Carolina was founded first January 1862, to direct operations along the North Carolina Coast. This was followed in March 1862 by the creation of the Department of the South which operated along the South Carolina and Georgia coasts, and to varying degrees, in Florida. The Department of the South remained active until June 1865, but the Department of North Carolina was incorporated into the Department of Virginia and North Carolina from July 1863.

The retention of Fortress Monroe in Virginia at the outbreak of hostilities provided the first avenue to penetrate the interior, along the Yorktown Peninsula and James River. Created as early as May 1861, the Department of Virginia continued to control the Virginia coastline until July 1863. In spring 1862, it became part of the operational territory of the main eastern army in Virginia but regained its autonomy in summer 1862 as those operations ended in a withdrawal of the bulk of the field forces from the outskirts of Richmond. By July 1863 it was extended to become the Department of Virginia and North Carolina, in order to assure unity of command for the coastal garrisons of Virginia and North Carolina. In mid-1864, its active operations could be synchronised with the Eastern army which was approaching Richmond overland from the north.

In January 1865, the advance of the Union armies northwards through Georgia and South Carolina, brought North Carolina into the sphere of the armies of the Western Theatre, and North Carolina was shifted to the aegis of the Military Division of the Mississippi. At the same time the Department of Virginia was revived and coordinated with the forces of the Eastern Theatre.

Department of North Carolina

(Established, January 7 1862-July 15 1863, discontinued, to Department of North Carolina and Virginia)

Ambrose Everett Burnside (January 7 1862-July 5 1862 interim to July 9 1862), John Gray Foster (July 6 1862-March 28 1863), Innis Newton Palmer (temporary March 29 1863-April 15 1863), John Gray Foster (April 16 1863-July 15 1863)

January 7 1862: The Department of North Carolina was established, comprising the parts of North Carolina occupied by Union forces, and territories detached from the Department of Virginia. Brigadier-General Ambrose Everett Burnside was appointed to command the Department of North Carolina, arriving on 13th January 1862.

January 13 1862: Brigadier-General Ambrose Everett Burnside arrived to command the Department of North Carolina.

July 6 1862: Brigadier-General John Gray Foster was appointed to command the Department of North Carolina, arriving on 10th July 1862, to succeed Major-General Ambrose Everett Burnside.

July 10 1862: Brigadier-General John Gray Foster arrived to command the Department of North Carolina, succeeding Major-General Ambrose Everett Burnside.

December 24 1862: XVIII Corps (North Carolina) was established in the Department of North Carolina, comprising forces from the expeditions to Roanoke Island and New Bern and the garrisons of New Bern, Plymouth and Beaufort.

March 29 1863: Brigadier-General Innis Newton Palmer assumed temporary command of the Department of North Carolina, succeeding Major-General John Gray Foster.

April 16 1863: Brigadier-General John Gray Foster assumed command of the Department of North Carolina, succeeding Brigadier-General Innis Newton Palmer.

April 23 1863: The District of Albemarle was established in the Department of North Carolina, comprising the territories around Plymouth and Roanoke, North Carolina. The District of the Neuse was established in the Department of North Carolina, comprising the stations of the Atlantic & North Carolina Railroad outside New Bern, North Carolina. The District of the Pamlico was established in the Department of North Carolina, comprising Washington, North Carolina, Hatteras Inlet and the surrounding areas.

April 27 1863: The District of the Neuse was discontinued. The District of Beaufort North Carolina was established in the Department of North Carolina by renaming the District of the Neuse. It included the region south of a line from Evan’s Mill due east to the Neuse River, except for Portsmouth, North Carolina. The District of the Pamlico was redefined to include Craven County north of the Neuse River except for Fort Anderson; and the counties of Pitt, Beaufort and Hyde.

July 15 1863: The Department of North Carolina was discontinued, and its territory incorporated into the Department of Virginia and North Carolina. The District of Albemarle transferred from the Department of North Carolina to the Department of Virginia and North Carolina. The District of Beaufort North Carolina transferred from the Department of North Carolina to the Department of Virginia and North Carolina. The District of the Pamlico transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

District of Albemarle

(Established, April 23 1863-July 15 1863, transferred to Department of North Carolina and Virginia)

Henry Walton Wessels (April 23 1863-July 15 1863)

April 23 1863: The District of Albemarle was established in the Department of North Carolina, comprising the territories around Plymouth and Roanoke, North Carolina. Brigadier-General Henry Walton Wessells assumed command of the District of Albemarle.

July 15 1863: The District of Albemarle transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

District of the Neuse

(Established, April 23 1863-April 27 1863, discontinued, to District of Beaufort North Carolina)

Henry Morris Naglee (April 23 1863-April 27 1863)

April 23 1863: The District of the Neuse was established in the Department of North Carolina, comprising the stations of the Atlantic & North Carolina Railroad outside New Bern, North Carolina. Brigadier-General Henry Morris Naglee assumed command of the District of the Neuse.

April 27 1863: The District of the Neuse was discontinued. The District of Beaufort North Carolina was established in the Department of North Carolina by renaming the District of the Neuse. It included the region south of a line from Evan’s Mill due east to the Neuse River, except for Portsmouth, North Carolina.

District of the Pamlico

(Established, April 23 1863-July 15 1863, transferred to Department of North Carolina and Virginia)

Henry Prince (April 23 1863-July 15 1863)

April 23 1863: The District of the Pamlico was established in the Department of North Carolina, comprising Washington, North Carolina, Hatteras Inlet and the surrounding areas. Brigadier-General Henry Prince assumed command of the District of the Pamlico.

April 27 1863: The District of the Pamlico was redefined to include Craven County north of the Neuse River except for Fort Anderson; and the counties of Pitt, Beaufort and Hyde.

July 15 1863: The District of the Pamlico transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

District of Beaufort North Carolina

(Established, from District of the Neuse, April 27 1863-July 15 1863, transferred to Department of North Carolina and Virginia)

Henry Morris Naglee (April 27 1863-May 28 1863), Francis Barretto Spinola (May 29 1863), Charles Adam Heckman (May 30 1863-July 15 1863)

April 27 1863: The District of Beaufort North Carolina was established in the Department of North Carolina by renaming the District of the Neuse. It included the region south of a line from Evan’s Mill due east to the Neuse River, except for Portsmouth, North Carolina. Brigadier-General Henry Morris Naglee assumed command of the District of Beaufort (North Carolina).

May 29 1863: Brigadier-General Francis Barretto Spinola assumed command of the District of Beaufort (North Carolina), succeeding Brigadier-General Henry Morris Naglee.

May 30 1863: Brigadier-General Charles Adam Heckman assumed command of the District of Beaufort (North Carolina), succeeding Brigadier-General Francis Barretto Spinola.

July 15 1863: The District of Beaufort North Carolina transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

XVIII Corps North Carolina

(Established, December 24 1862-July 15 1863, transferred to Department of North Carolina and Virginia)

John Gray Foster (December 24 1862-July 15 1863)

December 24 1862: XVIII Corps (North Carolina) was established in the Department of North Carolina, comprising forces that had taken part in the expeditions to Roanoke Island and New Bern and the garrisons of New Bern, Plymouth and Beaufort. Major-General John Gray Foster assumed of command XVIII Corps (North Carolina).

July 15 1983: XVIII Corps (North Carolina) transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

Department of the South

(Established, from Department of Florida and Department of Key West, March 15 1862-June 27 1865, discontinued, to Military Division of the Atlantic)

Thomas West Sherman (interim March 15 1862-March 30 1862), David Hunter (March 15 1862-September 4 1862), John Milton Brannan (temporary September 5 1862-September 16 1862), Ormsby McKnight Mitchel (September 17 1862-October 26 1862), John Milton Brannan (temporary October 27 1862-January 19 1863), David Hunter (January 20 1863-June 2 1863 interim to June 11 1863), Quincy Adams Gillmore (June 3 1863-April 30 1864), John Porter Hatch (May 1 1864-May 4 1864 interim to May 25 1864), John Gary Foster (May 5 1864-February 8 1865), Quincy Adams Gillmore (February 9 1865-June 27 1866)

March 15 1862: The Department of the South was established with headquarters at Hilton Head, South Carolina, comprising Florida, South Carolina and Georgia. Major-General David Hunter was appointed to command the Department of the South, arriving on March 31 1862. Brigadier-General Thomas West Sherman assumed interim command of the Department of the South. The Department of Florida was discontinued, and its territory incorporated into the Department of the South. The Department of Key West was discontinued, and incorporated into the Department of the South. The Western District was established in the Department of the South, comprising the territory in Florida west of a line due north of Cedar Keys.

March 31 1862: Major-General David Hunter arrived to command the Department of the South. The Northern District was established in the Department of the South, comprising the states of South Carolina, Georgia and the parts of Florida north of the line connecting Cape Canaveral to Cedar Keys and east of a north-south line from Cedar Keys to the border of Georgia. The Southern District was established in the Department of the South, comprising Florida south of a line connecting Cape Canaveral and Cedar Keys.

June 21 1862: The Northern District of the Department of the South was discontinued. The Southern District of the Department of the South was discontinued. The Western District of the Department of the South was discontinued.

August 8 1862: The District of Pensacola was established in the Department of the Gulf, comprising Florida west of the Apalachicola River. The rest of Florida remained in the Department of the South.

September 3 1862: X Corps (South) was established in the Department of the South.

September 5 1862: Brigadier-General John Milton Brannan assumed temporary command of the Department of the South, succeeding Major-General David Hunter.

September 17 1862: Major-General Ormsby McKnight Mitchel assumed command of the Department of the South, succeeding Brigadier-John Milton Brannan.

October 27 1862: Brigadier-General John Milton Brannan assumed temporary command of the Department of the South, succeeding Major-General Ormsby McKnight Mitchel.

January 20 1863: Major-General David Hunter assumed command of the Department of the South, succeeding Brigadier-General John Milton Brannan.

March 16 1863: The District of Key West and Tortugas was established in the Department of the Gulf. The Tortugas and West Florida were transferred from the Department of the South and the remainder of Florida remained in the Department of the South.

June 3 1863: Brigadier-General Quincy Adams Gillmore was appointed to command the Department of the South, arriving on 12th June 1863, to succeed Major-General David Hunter.

June 12 1863: Brigadier-General Quincy Adams Gillmore arrived to command the Department of the South, succeeding Major-General David Hunter.

January 13 1864: The Northern District of the South was established in the Department of the South. It comprised the territory from Charleston Harbour, to Saint Helena Sound, South Carolina.

January 15 1863: The District of Hilton Head was established in the Department of the South. It comprised Hilton Head, Seabrook and Saint Helena Islands in South Carolina, and Tybee Island and Fort Pulaski, Georgia.

February 1 1864: The District of Pensacola was discontinued in the Department of the Gulf and its territory transferred to the District of West Florida in the Department of the South. The District of West Florida was established in the Department of the South, comprising the vicinity of Pensacola, Florida.

February 7 1864: The District of Florida was established in the Department of the South, comprising the territories of Florida occupied by Federal troops.

April 25 1864: The District of Beaufort (South Carolina) was established in the Department of the South, comprising the vicinity of Beaufort, South Carolina.

April 28 1864: X Corps (South) transferred from the Department of the South to the Army of the James.

May 1 1864: Brigadier-General John Porter Hatch assumed temporary command of the Department of the South, succeeding Major-General Quincy Adams Gillmore.

May 5 1864: Major-General John Gray Foster was appointed to command the Department of the South, arriving on 26th May 1864.

May 17 1864: The District of West Florida transferred from the Department of the South to the Department of the Gulf.

May 26 1864: Major-General John Gray Foster arrived to command the Department of the South, succeeding Brigadier-General John Porter Hatch.

January 18 1865: The state of North Carolina transferred temporarily from the discontinued Department of Virginia and North Carolina to the Department of the South, pending the re-establishment of the Department of North Carolina on 31st January 1865. The District of Savannah was established in the Department of the South. It comprised the occupation forces in Savannah, Georgia.

January 31 1865: The state of North Carolina was removed from the temporary authority of the Department of the South.

February 9 1865: Major-General Quincy Adams Gillmore assumed command of the Department of the South, succeeding Major-General John Gray Foster.

April 16 1865: Major-General Edward Otho Cresap Ord was appointed to command the Department of the South but did not arrive to assume command. Major-General Quincy Adams Gillmore retained command of the Department of the South.

April 19 1865: Major-General Edward Otho Cresap Ord’s appointment to command the Department of the South was revoked before he assumed command.

May 13 1865: The District of Beaufort (South Carolina) was discontinued, and its territory transferred to the District of Port Royal. The District of Hilton Head was discontinued, and its territory transferred to the District of Port Royal. The District of Port Royal was established in the Department of the South. It comprised the territories formerly in the District of Beaufort and the District of Hilton Head.

May 17 1865: The parts of Florida in the Department of the South were transferred to the Department of the Gulf.

June 3 1865: The District of Florida transferred from the Department of the South to the Department of the Gulf. It comprised the state of Florida.

June 5 1865: The District of Northern Georgia was established in the Department of the South. It comprised the territory around Augusta and along the upper Savannah River. The District of Southern Georgia was established in the Department of the South. It comprised the state of Georgia south of the northern boundaries of Liberty, Tattnall, Montgomery, Laurens, Pulaski, Dooly, Sumter, Webster and Stewart counties. The District of Savannah was extended to include the counties of Chatham, Bryan, Effingham, Bulloch,

June 23 1865: The District of Charleston was established in the Department of the South. It comprised Charleston, Colleton, Orangeburg, Lexington, Barnwell and Richland districts (counties) of South Carolina. Emanuel, and Screven in Georgia. The District of Eastern South Carolina was established in the Department of the South. It consisted of Horry, Georgetown, Marion, Williamsburg, Marlboro, Darlington, Sumter, Kershaw and Chesterfield districts (counties). The District of Western South Carolina was established in the Department of the South. It consisted of Lancaster, Fairfield, Chester, York, Union, Newberry, Edgefield, Abbeville, Laurens, Spartanburg, Greenville, Anderson and Pickens districts (counties).

June 27 1865: The Department of the South was discontinued, and its territory incorporated into the Department of Georgia and the Department of South Carolina. The Northern District of the Department of the South was discontinued. The District of Charleston was discontinued. The District of Eastern South Carolina was discontinued. The District of Western South Carolina was discontinued. The District of Port Royal was discontinued. The District of Savannah was discontinued. The District of Southern Georgia was discontinued. The District of Northern Georgia was discontinued.

Western District of the South

(Established, from the Department of Florida, March 15 1862-June 21 1862, discontinued, to District of Pensacola)

Lewis Golding Arnold (March 15 1862-June 21 1862)

March 15 1862: The Western District was established in the Department of the South, comprising the territory in Florida west of a line due north of Cedar Keys. Brigadier-General Lewis Golding Arnold assumed command of the Western District of the Department of the South.

June 21 1862: The Western District of the Department of the South was discontinued.

Northern District of the South

(Established, March 31 1862-June 21 1862, discontinued)

Henry Washington Benham (March 31 1862-June 21 1862)

March 31 1862: The Northern District was established in the Department of the South, comprising the states of South Carolina, Georgia and the parts of Florida north of the line connecting Cape Canaveral to Cedar Keys and east of a north-south line from Cedar Keys to the border of Georgia. Brigadier-General Henry Washington Benham assumed command of the Northern District of the Department of the South.

June 21 1862: The Northern District of the Department of the South was discontinued.

Southern District of the South

(Established, from Department of Key West, March 31 1862-June 21 1862, discontinued)

John Milton Brannan (March 31 1862-June 21 1862)

March 31 1862: The Southern District was established in the Department of the South, comprising Florida south of a line connecting Cape Canaveral and Cedar Keys, including territory formerly in the Department of Key West. Brigadier-General John Milton Brannan assumed command of the Southern District of the Department of the South.

June 21 1862: The Southern District of the Department of the South was discontinued.

Northern District of the South

(Established, January 15 1864-June 27 1865, discontinued)

Alfred Howe Terry (January 15 1864April 24 1864), Alexander Schimmelfennig (April 25 1864-) September 1 1864), Rufus Saxton (September 2 1864-October 2 1864), Eliakim Parker Scammon (October 3 1864-October 25 1864), Edward Elmer Potter (October 26 1864-November 13 1864), John Porter Hatch (November 14 1864-November 27 1864), Edward Needles Hallowell (November 28 1864-December 7 1864), Alexander Schimmelfennig (December 8 1864-February 25 1865), John Porter Hatch (February 26 1865-June 27 1865)

January 13 1864: The Northern District was established in the Department of the South. It comprised the territory from Charleston Harbour, to Saint Helena Sound, South Carolina. Brigadier-General Alfred Howe Terry assumed command of the Northern District (South).

April 25 1864: Brigadier-General Alexander Schimmelfennig assumed command of the Northern District of the District of the South, succeeding Brigadier-General Alfred Howe Terry.

September 2 1864: Brigadier-General Rufus Saxton assumed command of the Northern District of the Department of the South, succeeding Brigadier-General Alexander Schimmelfennig.

October 3 1864: General Eliakim Parker Scammon assumed command of the Northern District of the Department of the South, succeeding Brigadier-General Rufus Saxton.

October 26 1864: Brigadier-General Edward Elmer Potter assumed command of the Northern District of the Department of the South, succeeding Brigadier-General Eliakim Parker Scammon.

November 14 1864: Brigadier-General John Porter Hatch assumed command of the Northern District of the Department of the South, succeeding Brigadier-General Edward Elmer Potter.

November 28 1864: Colonel Edward Needles Hallowell assumed command of the Northern District of the Department of the South, succeeding Brigadier-General John Porter Hatch.

December 8 1864: Brigadier-General Alexander Schimmelfennig assumed command of the Northern District of the Department of the South, succeeding Colonel Edward Needles Hallowell.

February 26 1865: Brigadier-General John Porter Hatch assumed command of the Northern District (South), succeeding Brigadier-General Alexander Schimmelfennig.

June 27 1865: The Northern District of the Department of the South was discontinued.

District of Hilton Head

(Established, January 15 1864-May 13 1865, discontinued, to District of Port Royal)

Truman Seymour (January 15 1863-February 5 1864), Joshua Blackwood Howell (February 6 1864-April 25 1864), William Watts Davis (April 26 1864-May 12 1864), William Birney (May 13 1864-June 1 1864), John Porter Hatch (June 2 1864-July 31 1864), Edward Elmer Potter (August 1 1864-October 25 1864), Philip Perry Brown (October 26 1864-October 31 1864), Edward Elmer Potter (November 1 1864-November 27 1864), Philip Perry Brown (November 28 1864-December 23 1864), Milton Smith Littlefield (December 24 1864-December 31 1864), Philip Perry Brown (January 1 1865-February 21 1865), Milton Smith Littlefield (February 22 1865-May 13 1865)

January 15 1863: The District of Hilton Head was established in the Department of the South. It comprised Hilton Head, Seabrook and Saint Helena Islands in South Carolina, and Tybee Island and Fort Pulaski, Georgia. Brigadier-General Truman Seymour assumed command of the District of Hilton Head.

February 6 1864: Colonel Joshua Blackwood Howell assumed command of the District of Hilton Head, succeeding Brigadier-General Truman Seymour.

April 26 1864: Colonel William Watts Hart Davis assumed command of the District of Hilton Head, succeeding Colonel Joshua Blackwood Howell.

May 13 1864: Brigadier-General William Birney assumed command of the District of Hilton Head, succeeding Colonel William Watts Hart Davis.

June 2 1864: Brigadier-General John Porter Hatch assumed command of the District of Hilton Head, succeeding Brigadier-General William Birney.

August 1 1864: Brigadier-General Edward Elmer Potter assumed command of the District of Hilton Head, succeeding Brigadier-General John Porter Hatch.

October 26 1864: Colonel Philip Perry Brown assumed command of the District of Hilton Head, succeeding Brigadier-General Edward Elmer Potter.

November 1 1864: Brigadier-General Edward Elmer Potter assumed command of the District of Hilton Head, succeeding Colonel Philip Perry Brown.

November 28 1864: Colonel Philip Perry Brown assumed command of the District of Hilton Head, succeeding Brigadier-General Edward Elmer Potter.

December 24 1864: Colonel Milton Smith Littlefield assumed command of the District of Hilton Head, succeeding Colonel Philip Perry Brown.

January 1 1865: Colonel Philip Perry Brown assumed command of the District of Hilton Head, succeeding Colonel Milton Smith Littlefield.

February 22 1865: Colonel Milton Smith Littlefield assumed command of the District of Hilton Head, succeeding Colonel Philip Perry Brown.

May 13 1865: The District of Hilton Head was discontinued, and its territory transferred to the District of Port Royal.

District of West Florida

(Established, from District of Pensacola, February 1 1864-May 17 1864, transferred to Department of the Gulf)

Alexander Asboth (February 1 1864-May 17 1864)

February 1 1864: The District of Pensacola was discontinued in the Department of the Gulf and its territory transferred to the District of West Florida in the Department of the South. The District of West Florida was established in the Department of the South, comprising the vicinity of Pensacola, Florida. Brigadier-General Alexander Asboth assumed command of the District of West Florida.

May 17 1864: The District of West Florida transferred from the Department of the South to the Department of the Gulf.

District of Florida

(Established, February 7 1864-June 3 1865, transferred to Department of the Gulf)

Truman Seymour (February 7 1864-March 27 1864), John Porter Hatch (March 28 1864-April 19 1864), William Birney (April 20 1864-May 12 1864), George Henry Gordon (May 13 1864-June 1 1864), William Birney (June 2 1864-July 28 1864), William Henry Noble (temporary July 29 1864-August 3 1864), John Porter Hatch (August 4 1864-November 13 1864), Eliakim Parker Scammon (November 14 1864-April 6 1865), Benjamin Chew Tilghman (April 7 1865-April 18 1865), Israel Vogdes (April 19 1865-June 3 1865)

February 7 1864: The District of Florida was established in the Department of the South, comprising the territories of Florida occupied by Federal troops. Brigadier-General Truman Seymour was appointed to command the District of Florida, arriving on 16th February.

February 16 1864: Brigadier-General Truman Seymour arrived to command the District of Florida.

March 28 1864: Brigadier-General John Porter Hatch assumed command of the District of Florida, succeeding Brigadier-General Truman Seymour.

April 20 1864: Brigadier-General William Birney assumed command of the District of Florida, succeeding Brigadier-General John Porter Hatch.

May 13 1864: Brigadier-General George Henry Gordon assumed command of the District of Florida, succeeding Brigadier-General William Birney.

June 2 1864: Brigadier-General William Birney assumed command of the District of Florida, succeeding Brigadier-General George Henry Gordon.

July 29 1864: Colonel William Henry Noble assumed temporary command of the District of Florida, succeeding Brigadier-General William Birney.

August 4 1864: Brigadier-General John Porter Hatch assumed command of the District of Florida, succeeding Colonel William Henry Noble.

November 14 1864: Brigadier-General Eliakim Parker Scammon assumed command of the District of Florida, succeeding Brigadier-General John Porter Hatch.

April 7 1865: Colonel Benjamin Chew Tilghman assumed command of the District of Florida, succeeding Brigadier-General Eliakim Parker Scammon.

April 19 1865: Brigadier-General Israel Vogdes assumed command of the District of Florida, succeeding Colonel Benjamin Chew Tilghman.

June 3 1865: The District of Florida transferred from the Department of the South to the Department of the Gulf. It comprised the state of Florida.

District of Beaufort South Carolina

(Established, April 25 1864-May 13 1865, discontinued, to District of Port Royal)

Rufus Saxton (April 25 1864-January 22 1865), Edward Elmer Potter (January 23 1865-May 13 1865)

April 25 1864: The District of Beaufort (South Carolina) was established in the Department of the South, comprising the vicinity of Beaufort, South Carolina. Brigadier-General Rufus Saxton assumed command of the District of Beaufort (South Carolina).

January 23 1865: Brigadier-General Edward Elmer Potter assumed command of the District of Beaufort (South Carolina), succeeding Brigadier-General Rufus Saxton.

May 13 1865: The District of Beaufort (South Carolina) was discontinued, and its territory transferred to the District of Port Royal.

District of Savannah

(Established, January 18 1865-June 27 1865, discontinued)

Cuvier Grover (January 18 1865-February 11 1865), Henry Warner Birge (February 12 1865-June 4 1865), Stewart Lyndon Woodford (June 5 1865-June 22 1865-June 22 1865), Henry Warner Birge (June 23 1865-June 27 1865)

January 18 1865: The District of Savannah was established in the Department of the South. It comprised the occupation forces in Savannah, Georgia. Brigadier-General Cuvier Grover assumed command of the District of Savannah.

February 12 1865: Brigadier-General Henry Warner Birge assumed command of the District of Savannah, succeeding Brigadier-General Cuvier Grover.

June 5 1865: The District of Savannah was extended to include the counties of Chatham, Bryan, Effingham, Bulloch, Emanuel, and Screven in Georgia. Colonel Stewart Lyndon Woodford assumed command of the District of Savannah, succeeding Brigadier-General Henry Warner Birge.

June 23 1865: Brigadier-General Henry Warner Birge assumed command of the District of Savannah, succeeding Colonel Stewart Lyndon Woodford.

June 27 1865: The District of Savannah was discontinued.

District of Port Royal

(Established, from District of Hilton Head and District of Beaufort South Carolina, May 13 1865-June 27 1865, discontinued)

Edward Elmer Potter (May 13 1865-June 27 1865)

May 13 1865: The District of Beaufort (South Carolina) was discontinued, and its territory transferred to the District of Port Royal. The District of Hilton Head was discontinued, and its territory transferred to the District of Port Royal. The District of Port Royal was established in the Department of the South. It comprised the territories formerly in the District of Beaufort and the District of Hilton Head. Brigadier-General Edward Elmer Potter assumed command of the District of Port Royal.

June 27 1865: The District of Port Royal was discontinued.

District of Northern Georgia

(Established, June 5 1865-June 27 1865, discontinued)

Edward Leslie Molineux (June 5 1865-June 27 1865)

June 5 1865: The District of Northern Georgia was established in the Department of the South. It comprised the territory around Augusta and along the upper Savannah River. Colonel Edward Leslie Molineux assumed command of the District of Northern Georgia.

June 27 1865: The District of Northern Georgia was discontinued.

District of Southern Georgia

(Established, June 5 1865-June 27 1865, discontinued)

Cuvier Grover (June 5 1865-June 27 1865)

June 5 1865: The District of Southern Georgia was established in the Department of the South. It comprised the state of Georgia south of the northern boundaries of Liberty, Tattnall, Montgomery, Laurens, Pulaski, Dooly, Sumter, Webster and Stewart counties. Brigadier-General Cuvier Grover assumed command of the District of Southern Georgia.

June 27 1865: The District of Southern Georgia was discontinued.

District of Charleston

(Established, June 23 1865-June 27 1865, discontinued)

John Porter Hatch (June 23 1865-June 27 1865)

June 23 1865: The District of Charleston was established in the Department of the South. It comprised Charleston, Colleton, Orangeburg, Lexington, Barnwell and Richland districts (counties) of South Carolina. Brigadier-General John Porter Hatch assumed command of the District of Charleston.

June 27 1865: The District of Charleston was discontinued.

District of Eastern South Carolina

(Established, June 23 1865-June 27 1865, discontinued)

George Lafayette Beal (June 23 1865-June 27 1865)

June 23 1865: The District of Eastern South Carolina was established in the Department of the South. It consisted of Horry, Georgetown, Marion, Williamsburg, Marlboro, Darlington, Sumter, Kershaw and Chesterfield districts (counties). Brigadier-General George Lafayette Beal assumed command of the District of Eastern South Carolina.

June 27 1865: The District of Eastern South Carolina was discontinued.

District of Western South Carolina

(Established, June 23 1865-June 27 1865, discontinued)

Charles Henry Van Wyck (June 23 1865-June 27 1865)

June 23 1865: The District of Western South Carolina was established in the Department of the South. It consisted of Lancaster, Fairfield, Chester, York, Union, Newberry, Edgefield, Abbeville, Laurens, Spartanburg, Greenville, Anderson and Pickens districts (counties). Colonel Charles Henry Van Wyck assumed command of the District of Western South Carolina.

June 27 1865: The District of Western South Carolina was discontinued.

X Corps South

(Established, September 3 1862-April 28 1864, transferred to Army of the James)

John Milton Brannan (September 3 1862-September 16 1862), Ormsby McKnight Mitchel (September 17 1862-October 26 1862, John Milton Brannan (temporary October 27 1862-January 19 1863), David Hunter (January 20 1863-June 11 1863), Quincy Adams Gillmore (June 12 1863-April 28 1864)

September 3 1862: X Corps (South) was established in the Department of the South. Brigadier-General John Milton Brannan assumed command of X Corps (South).

September 17 1862: Major-General Ormsby McKnight Mitchel assumed command of X Corps (South), succeeding Brigadier-John Milton Brannan.

October 27 1862: Brigadier-General John Milton Brannan assumed temporary command of the X Corps (South), succeeding Major-General Ormsby McKnight Mitchel.

January 20 1863: Major-General David Hunter assumed command of the X Corps (South), succeeding Brigadier-General John Milton Brannan.

June 12 1863: Brigadier-General Quincy Adams Gillmore assumed command of X Corps (South), succeeding Major-General David Hunter.

April 28 1864: X Corps (South) transferred from the Department of the South to the Army of the James.

Department of Virginia and North Carolina

(Established, from Department of Virginia and Department of North Carolina July 15 1863-January 18 1865, discontinued, to Department of Virginia and Military Division of the Mississippi)

John Gray Foster (July 15 1863-August 27 1863), Benjamin Franklin Butler (August 28 1863-July 26 1864), Edward Otho Cresap Ord (temporary July 27 1864-August 26 1864, August 27 1864-September 4 1864), David Bell Birney (temporary September 5 1864September 6 1864)-, Benjamin Franklin Butler (September 7 1864-DFecember 13 1864), Edward Otho Cresap Ord (temporary December 14 1864-December 23 1864), Benjamin Franklin Butler (December 24 1864-January 18 1865)

July 15 1863: The Department of North Carolina was discontinued, and its territory taken into the Department of Virginia and North Carolina. The Department of Virginia was discontinued, and its territory taken into the Department of Virginia and North Carolina. The Department of Virginia and North Carolina was established with headquarters at Fortress Monroe, comprising the territories formerly under the authority of Department of North Carolina and the Department of Virginia. Major-General John Gray Foster appointed to command the Department of Virginia and North Carolina, arriving on 18th July 1863. The District of Albemarle transferred from the Department of North Carolina to the Department of Virginia and North Carolina. The District of Beaufort North Carolina transferred from the Department of North Carolina to the Department of Virginia and North Carolina. The District of the Pamlico transferred from the Department of North Carolina to the Department of Virginia and North Carolina. IV Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina. VII Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina.

July 18 1863: Major-General John Gray Foster arrived to command the Department of Virginia and North Carolina. The District of Yorktown was established in the Department of Virginia and North Carolina, comprising the vicinity of Yorktown, Virginia.

July 21 1863: The Defences of New Bern was established in the Department of Virginia and North Carolina, comprising the vicinity of New Bern, North Carolina.

August 14 1863: The District of North Carolina was established in the Department of Virginia and North Carolina, comprising the former District of Albemarle, District of the Pamlico, District of Beaufort and the Defences of New Bern, each of which became a Sub-District of the District of North Carolina. The Sub-District of the Pamlico was established in the District of North Carolina. The Defences of New Bern transferred to the District of North Carolina. The District of Albemarle was renamed as the Sub-District of Albemarle in the District of North Carolina. The District of Beaufort (North Carolina) was renamed as the Sub-District of Beaufort (North Carolina) in the District of North Carolina. The Sub-District of Beaufort (North Carolina) was established in the District of North Carolina.

August 16 1863: The Army of North Carolina was established in the Department of Virginia and North Carolina.

August 21 1863: The District of Virginia was established in the Department of Virginia and North Carolina, comprising the territory around Fort Monroe, Camp Hamilton, Newport News, Yorktown, Suffolk, Portsmouth and Norfolk. The District of Yorktown was renamed as the Sub-District of Yorktown in the District of Virginia. The Sub-District of Yorktown was established in the District of Virginia, comprising the renamed District of Yorktown.

August 28 1863: Major-General Benjamin Franklin Butler assumed command of the Department of Virginia and North Carolina, succeeding Major-General John Gray Foster.

September 23 1863: The Sub-District of Yorktown was discontinued, and renamed as the District of Yorktown in the Department of Virginia and North Carolina. The District of Yorktown was established in the Department of Virginia and North Carolina, comprising the territory of the former Sub-District of Yorktown from the District of Virginia.

December 11 1863: The District of Currituck was established in the Department of Virginia and North Carolina, comprising Pungo, Currituck Court House, Coinjack and Northwest Landing on the border of Virginia and North Carolina.

December 21 1863: Northampton and Accomac counties of Virginia were transferred from the Middle Department to the Department of Virginia and North Carolina.

April 25 1864: The Army of North Carolina was discontinued, and its field forces transferred to the Department of Virginia and North Carolina.

April 28 1864: The Army of the James was established in the Department of Virginia and North Carolina.

May 17 1864: The District of Yorktown was discontinued.

May 27 1864: The District of Eastern Virginia was established in the Department of Virginia and North Carolina.

June 21 1864: St Mary’s county, Maryland, transferred from the Department of Virginia and North Carolina to the Department of Washington.

July 7 1864: The District of St Mary’s transferred from the Department of Virginia and North Carolina to the Department of Washington. It comprised the county of St Mary’s in Maryland and the Point Lookout prison camp.

July 27 1864: Major-General Edward Otho Cresap Ord assumed temporary command of the Department of Virginia and North Carolina, succeeding Major-General Benjamin Franklin Butler.

August 27 1864: Major-General Edward Otho Cresap Ord assumed full command of the Department of Virginia and North Carolina.

September 5 1864: Major-General David Bell Birney assumed temporary command of the Department of Virginia and North Carolina, succeeding Major-General Edward Otho Cresap Ord.

September 7 1864: Major-General Benjamin Franklin Butler assumed command of the Department of Virginia and North Carolina, succeeding Major-General David Bell Birney.

October 21 1864: The District of North Carolina was discontinued. The Sub-District of New Bern transferred from the District of North Carolina to the Department of Virginia and North Carolina. The Sub-District of Beaufort (North Carolina) transferred from the District of North Carolina to the Department of Virginia and North Carolina.

December 14 1864: Major-General Edward Otho Cresap Ord assumed temporary command of the Department of Virginia and North Carolina, succeeding Major-General Benjamin Franklin Butler.

December 24 1864: Major-General Benjamin Franklin Butler assumed command of the Department of Virginia and North Carolina, succeeding Major-General Edward Otho Cresap Ord.

January 6 1865: Terry’s Provisional Corps was established in the Department of Virginia and North Carolina; effectively comprising the former X Corps, in the Department of Virginia and North Carolina.

January 18 1865: The Department of Virginia and North Carolina was discontinued, and the territory within 60 miles of Fort Monroe, Northampton and Accomac counties, Virginia south of the Rappahannock River and east of the Fredericksburg-Richmond-Petersburg-Weldon Railroad transferred to the Department of Virginia. The Army of the James transferred interim from the Department of Virginia and North Carolina to the Department of Virginia. The District of Currituck was discontinued. The District of Eastern Virginia transferred from the Department of Virginia and North Carolina to the Department of Virginia. The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia and North Carolina to the Department of Virginia. The state of North Carolina transferred temporarily from the discontinued Department of Virginia and North Carolina to the Department of the South, pending the re-establishment of the Department of North Carolina on January 31 1865. The Sub-District of New Bern transferred from the Department of Virginia and North Carolina to the Department of Virginia.

District of Albemarle

(Transferred from Department of North Carolina, July 15 1863-August 14 1863, discontinued, to District of North Carolina)

Henry Walton Wessels (July 15 1863-August 14 1863)

July 15 1863: The District of Albemarle transferred from the Department of North Carolina to the Department of Virginia and North Carolina. Brigadier-General Henry Walton Wessells retained command of the District of Albemarle.

August 14 1863: The District of Albemarle was renamed as the Sub-District of Albemarle in the District of North Carolina.

District of Beaufort North Carolina

(Transferred, from Department of North Carolina, July 15 1863-August 14 1863, discontinued, to Sub-District of Beaufort North Carolina)

Charles Adam Heckman (July 15 1863-July 20 1863), Thomas Jonathan Coffin Amory (July 21 1863-August 14 1863)

July 15 1863: The District of Beaufort North Carolina transferred from the Department of North Carolina to the Department of Virginia and North Carolina. Brigadier-General Charles Adam Heckman retained command of the District of Beaufort (Virginia and North Carolina).

July 21 1863: Colonel Thomas Jonathan Coffin Amory assumed command of the District of Beaufort (North Carolina and Virginia), succeeding Brigadier-General Charles Adam Heckman.

August 14 1863: The District of Beaufort (North Carolina) was renamed as the Sub-District of Beaufort (North Carolina) in the District of North Carolina.

District of the Pamlico

(Transferred from Department of North Carolina, July 15 1863-August 14 1863, discontinued, to District of North Carolina)

Joseph Miller McChesney (temporary July 15 1863-July 30 1863), Orson E Moulton (temporary July 31 1863-August 14 1863)

July 15 1863: The District of the Pamlico transferred from the Department of North Carolina to the Department of Virginia and North Carolina. Colonel Joseph Miller McChesney assumed temporary command of the District of the Pamlico, succeeding Brigadier-General Henry Prince.

July 31 1863: Lieutenant-Colonel Orson E Moulton assumed temporary command of the District of the Pamlico, succeeding Colonel Joseph Miller McChesney.

August 14 1863: The District of the Pamlico was renamed the Sub-District of the District of North Carolina.

District of Yorktown

(Established, July 18 1863-August 21 1863, discontinued, to Sub-District of Yorktown)

Isaac Jones Wistar (July 18 1863-August 21 1863)

July 18 1863: The District of Yorktown was established in the Department of Virginia and North Carolina, comprising the vicinity of Yorktown, Virginia. Brigadier-General Isaac Jones Wistar assumed command of the District of Yorktown.

August 21 1863: The District of Yorktown was renamed as the Sub-District of Yorktown in the District of Virginia.

Defences of New Bern

(Established, July 21 1863-August 14 1863, transferred to District of North Carolina)

Charles Adam Heckman (July 21 1863-August 14 1863)

July 21 1863: The Defences of New Bern was established in the Department of Virginia and North Carolina, comprising the vicinity of New Bern, North Carolina. Brigadier-General Charles Adam Heckman assumed command of the Defences of New Bern.

August 14 1863: The Defences of New Bern transferred to the District of North Carolina.

District of North Carolina

(Established, from District of the Albemarle, District of the Pamlico, District of Beaufort and Defences of New Bern, August 14 1863-October 21 1864, discontinued, to Department of Virginia and North Carolina)

John James Peck (August 14 1863-January 3 1864), Innis Newton Palmer (January 4 1864-February 4 1864), John James Peck (February 5 1864-April 24 1864), Innis Newton Palmer (April 25 1864-October 1 1864)

August 14 1863: The District of North Carolina was established in the Department of Virginia and North Carolina, comprising the former District of Albemarle, District of the Pamlico, District of Beaufort and the Defences of New Bern, each of which became a Sub-District of the District of North Carolina. Major-General John James Peck assumed command of the District of North Carolina.

January 4 1864: Brigadier-General Innis Newton Palmer assumed command of the District of North Carolina in the Department of Virginia and North Carolina, succeeding Major-General John James Peck.

February 5 1864: Major-General John James Peck assumed command of the District of North Carolina, succeeding Brigadier-General Innis Newton Palmer.

March 5 1864: The Defences of New Bern was discontinued, and renamed as the Sub-District of New Bern. The Sub-District of New Bern was established in the District of North Carolina by renaming the existing Defences of New Bern.

April 19 1864: The Sub-District of Albemarle was discontinued.

April 25 1864: Brigadier-General Innis Newton Palmer assumed command of the District of North Carolina, succeeding Major-General John James Peck.

October 21 1864: The District of North Carolina was discontinued. The Sub-District of New Bern transferred from the District of North Carolina to the Department of Virginia and North Carolina. The Sub-District of Beaufort (North Carolina) transferred from the District of North Carolina to the Department of Virginia and North Carolina.

Sub-District of the Pamlico

(Established, from District of the Pamlico, August 14 1863-May 1 1864, discontinued)

Orson E Moulton (August 14 1863-September 7 1863), Josiah Pickett (September 8 1863-October 25 1863), Joseph Miller McChesney (October 26 1863-March 10 1864), Edward Harland (March 11 1864-May 1 1864)

August 14 1863: The District of the Pamlico was renamed the Sub-District of the District of North Carolina. The Sub-District of the Pamlico was established in the District of North Carolina. Lieutenant-Colonel Orson E Moulton retained command of the Sub-District of the Pamlico.

September 8 1863: Colonel Josiah Pickett assumed command of the Sub-District of the Pamlico, succeeding Lieutenant-Colonel Orson E Moulton.

October 26 1863: Colonel Joseph Miller McChesney assumed temporary command of the Sub-District of the Pamlico, succeeding Colonel Josiah Pickett.

March 11 1864: Brigadier-General Edward Harland assumed command of the Sub-District of the Pamlico, succeeding Colonel Joseph Miller McChesney.

May 1 1864: The Sub-District of the Pamlico was discontinued.

Defences of New Bern

(Transferred from Department of Virginia and North Carolina, August 14 1863-March 5 1864, discontinued, to Sub-District of New Bern)

Innis Newton Palmer (August 14 1863-October 6 1863), Thomas Jonathan Coffin Amory (October 7 1863-November 8 1863) Innis Newton Palmer (November 9 1863-March 5 1864)

August 14: 1863: The Defences of New Bern transferred to the District of North Carolina. Brigadier-General Innis Newton Palmer assumed command of the Defences of New Bern, succeeding Brigadier-General Charles Adam Heckman.

October 7 1863: Colonel Thomas Jonathan Coffin Amory assumed command of the Defences of New Bern, succeeding Brigadier-General Innis Newton Palmer.

November 9 1863: Brigadier-General Innis Newton Palmer assumed command of the Defences of New Bern, succeeding Colonel Thomas Jonathan Coffin Amory.

March 5 1864: The Defences of New Bern was discontinued, and renamed as the Sub-District of New Bern.

Sub-District of Albemarle

(Established, from District of Albemarle, August 14 1863-April 19 1864, discontinued)

Henry Walton Wessels (August 14 1863-April 19 1864)

August 14 1863: The Sub-District of Albemarle was established in the District of North Carolina. It comprised the renamed District of Albemarle transferred from the Department of North Carolina. Brigadier-General Henry Walton Wessells retained command of the Sub-District of Albemarle.

April 19 1864: The Sub-District of Albemarle in the District of North Carolina was discontinued.

Sub-District of Beaufort North Carolina

(From District of Beaufort North Carolina, August 14 1863-October 21 1864, to Department of Virginia and North Carolina)

Charles Adam Heckman (August 14 1863-October 10 1863), James Jourdan (October 11 1863-June 26 1864), Thomas Jonathan Coffin Amory (June 27 1864-October 6 1864), James Stewart (October 7 1864-October 21 1864)

August 14 1863: The Sub-District of Beaufort (North Carolina) was established in the District of North Carolina. It comprised the renamed Sub-District of Beaufort (North Carolina) transferred from the Department of North Carolina. Brigadier-General Charles Adam Heckman assumed command of the Sub-District of Beaufort (North Carolina), succeeding Colonel Jonathan Coffin Amory.

October 11 1863: Colonel James Jourdan assumed command of the Sub-District of Beaufort (North Carolina), succeeding Brigadier-General Charles Adam Heckman.

June 27 1864: Colonel Thomas Jonathan Coffin Amory assumed command of the Sub-District of Beaufort (North Carolina), succeeding Colonel James Jourdan.

October 7 1864: Colonel James Stewart assumed command of the Sub-District of Beaufort (North Carolina), succeeding Colonel Thomas Jonathan Coffin Amory.

October 21 1864: The Sub-District of Beaufort (North Carolina) transferred from the District of North Carolina to the Department of Virginia and North Carolina.

Sub-District of New Bern

(Established, from Defences of New Bern, March 5 1864-October 21 1864, transferred to Department of Virginia and North Carolina)

Innis Newton Palmer (March 5 1864-April 24 1864), Thomas Jonathan Coffin Amory (April 25 1864-May 2 1864), Edward Harland (May 3 1864-October 21 1864)

March 5 1864: The Sub-District of New Bern was established in the District of North Carolina It comprised the renamed Defences of New Bern transferred from the Department of North Carolina, including the vicinity of New Bern, North Carolina. Brigadier-General Innis Newton Palmer retained command of the Sub-District of New Bern.

April 25 1864: Colonel Thomas Jonathan Coffin Amory assumed command of the Sub-District of New Bern, succeeding Brigadier-General Innis Newton Palmer.

May 3 1864: Brigadier-General Edward Harland assumed command of the Sub-District of New Bern, succeeding Colonel Thomas Jonathan Coffin Amory.

October 21 1864: The Sub-District of New Bern transferred from the District of North Carolina to the Department of Virginia and North Carolina.

District of Virginia

(Established, August 21 1863-September 23 1863, discontinued, to District of Virginia)

Henry Morris Naglee (August 21 1863-September 23 1863)

August 21 1863: The District of Virginia was established in the Department of Virginia and North Carolina, comprising the territory around Fort Monroe, Camp Hamilton, Newport News, Yorktown, Suffolk, Portsmouth and Norfolk. Brigadier-General Henry Morris Naglee assumed command of the District of Virginia.

September 23 1863: The District of Virginia was discontinued, and its territory transferred to the District of Yorktown.

Sub-District of Yorktown

(From District of Yorktown, August 21 1863-September 23 1863, to District of Yorktown)

Isaac Jones Wistar (August 21 1863-September 23 1863)

August 21 1863: The Sub-District of Yorktown was established in the District of Virginia, comprising the renamed District of Yorktown transferred from the Department of Virginia and North Carolina. Brigadier-General Isaac Jones Wistar retained command of the Sub-District of Yorktown.

September 23 1863: The Sub-District of Yorktown was discontinued, and renamed as the District of Yorktown in the Department of Virginia and North Carolina.

District of Yorktown

(From District of Virginia and Sub-District of Yorktown, September 23 1863-May 17 1864, discontinued)

Isaac Wistar Jones September 23 1863-December 21 1863), Robert Mayhew West (temporary December 22 1863-January 21 1864), Isaac Wistar Jones (January 22 1864-February 15 1864), Robert Mayhew West (temporary February 16 1864-March 7 1864), Isaac Jones Wistar (March 8 1864-April 20 1864), William Farrar Smith (April 21 1864-May 3 1864), Joseph Bradford Carr (May 4 1864-May 17 1864)

September 23 1863: The District of Yorktown was established in the Department of Virginia and North Carolina, comprising the territory of the former Sub-District of Yorktown transferred from the District of Virginia. Brigadier-General Isaac Jones Wistar assumed command of the District of Yorktown.

December 22 1863: Colonel Robert Mayhew West assumed temporary command of the District of Yorktown, succeeding Brigadier-General Isaac Jones Wistar.

January 22 1864: Brigadier-General Isaac Jones Wistar assumed command of the District of Yorktown, succeeding Colonel Robert Mayhew West.

February 16 1864: Colonel Robert Mayhew West assumed temporary command of the District of Yorktown, succeeding Brigadier-General Isaac Jones Wistar.

March 8 1864: Brigadier-General Isaac Jones Wistar assumed command of the District of Yorktown, succeeding Colonel Robert Mayhew West.

April 21 1864: Major-General William Farrar Smith assumed command of the District of Yorktown, succeeding Brigadier-General Isaac Jones Wistar.

May 4 1864: Brigadier-General Joseph Bradford Carr assumed command of the District of Yorktown, succeeding Major-General William Farrar Smith.

May 17 1864: The District of Yorktown was discontinued.

District of Currituck

(Established, December 11 1863-January 18 1865, discontinued)

James Hewitt Ledlie (December 11 1863-February 15 1864), Samuel Henry Roberts (February 16 1864-January 18 1865)

December 11 1863: The District of Currituck was established in the Department of Virginia and North Carolina, comprising Pungo, Currituck Court House, Coinjack and Northwest Landing on the border of Virginia and North Carolina. Brigadier-General James Hewitt Ledlie assumed command of the District of Currituck.

February 16 1864: Colonel Samuel Henry Roberts assumed command of the District of Currituck, succeeding Brigadier-General James Hewitt Ledlie.

January 18 1865: The District of Currituck was discontinued.

Sub-District of New Bern

(Transferred from District of North Carolina, October 21 1864-January 18 1865, transferred to Department of Virginia)

Edward Harland (October 21 1864-January 18 1865)

October 21 1864: The Sub-District of New Bern transferred from the District of North Carolina to the Department of Virginia and North Carolina. Brigadier-General Edward Harland retained command of the Sub-District of New Bern.

January 18 1865: The Sub-District of New Bern transferred from the Department of Virginia and North Carolina to the Department of Virginia.

Sub-District of Beaufort North Carolina

(Transferred from District of North Carolina, October 21 1864-January 18 1865, transferred to Department of Virginia)

James Stewart (October 21 1864-January 18 1865)

October 21 1864: The Sub-District of Beaufort (North Carolina) transferred from the District of North Carolina to the Department of Virginia and North Carolina. Colonel James Stewart retained command of the Sub-District of Beaufort (Virginia and North Carolina).

January 18 1865: The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia and North Carolina to the Department of Virginia.

District of St Mary’s

(Transferred from War Department, December 2 1863-July 7 1864, transferred to Department of Washington)

Gilman Marston (December 2 1863-April 2 1864), Edward Winslow Hinks (April 3 1864-April 19 1864), Alonzo Granville Draper (April 20 1864-July 7 1864)

December 2 1863: The District of St Mary’s transferred from the War Department to the Department of Virginia and North Carolina. It comprised the county of St Mary’s in Maryland and the Point Lookout prison camp. Brigadier-General Gilman Marston retained command of the District of St Mary’s.

April 3 1864: Brigadier-General Edward Winslow Hinks assumed command of the District of St Mary’s, succeeding Brigadier-General Gilman Marston.

April 20 1864: Colonel Alonzo Granville Draper assumed command of the District of St Mary’s, succeeding Brigadier-General Edward Winslow Hinks.

July 7 1864: The District of St Mary’s transferred from the Department of Virginia and North Carolina to the Department of Washington.

District of Eastern Virginia

(Established, May 27 1864-January 18 1865, transferred to Department of Virginia)

George Foster Shepley (May 27 1864-January 18 1865)

May 27 1864: The District of Eastern Virginia was established in the Department of Virginia and North Carolina. Brigadier-General George Foster Shepley assumed command of the District of Eastern Virginia.

January 18 1865: The District of Eastern Virginia transferred from the Department of Virginia and North Carolina to the Department of Virginia.

IV Corps Virginia and North Carolina

(Transferred from Department of Virginia July 15 1863-August 1 1863, discontinued, to XVIII Corps Virginia and North Carolina)

Erasmus Darwin Keyes (July 15 1863-August 1 1863)

July 15 1863: IV Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina. Major-General Erasmus Darwin Keyes retained command of IV Corps (Virginia and North Carolina).

August 1 1863: IV Corps (Virginia and North Carolina) was discontinued, and its forces assigned to XVIII Corps (Virginia and North Carolina).

VII Corps Virginia and North Carolina

(Transferred from Department of Virginia, July 15 1863-August 1 1863, discontinued, to XVIII Corps Virginia and North Carolina)

George Washington Getty (temporary July 15 1863), Henry Morris Naglee (July 16 1863-July 19 1863), George Washington Getty (temporary July 20 1863-July 24 1863), Henry Morris Naglee (July 25 1863-August 1 1863)

July 15 1863: VII Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina. Brigadier-General George Washington Getty assumed temporary command of VII Corps (Virginia and North Carolina), succeeding Major-General John Adams Dix.

July 16 1863: Brigadier-General Henry Morris Naglee assumed command of VII Corps (Virginia and North Carolina), succeeding Brigadier-General George Washington Getty.

July 20 1863: Brigadier-General George Washington Getty assumed temporary command of VII Corps (Virginia and North Carolina) succeeding Brigadier-General Henry Morris Naglee.

July 25 1863: Brigadier-General Henry Morris Naglee assumed temporary command of VII Corps (Virginia and North Carolina), succeeding Brigadier-General George Washington Getty.

August 1 1863: VII Corps (Virginia and North Carolina) was discontinued, and its forces assigned to XVIII Corps (Virginia and North Carolina).

XVIII Corps Virginia and North Carolina

(Transferred from Department of North Carolina, July 15 1863-August 16 1863, transferred to Army of North Carolina)

John Gray Foster (July 15 1863-July 17 1863), Innis Newton Palmer (temporary July 18 1863-August 13 1863), John James Peck (August 14 1863-August 16 1863)

July 15 1983: XVIII Corps (North Carolina) transferred from the Department of North Carolina to the Department of Virginia and North Carolina. Major-General John Gray Foster retained command of XVIII Corps (Virginia and North Carolina).

July 18 1863: Brigadier-General Innis Newton Palmer assumed temporary command of XVIII Corps (Virginia and North Carolina), succeeding Major-General John Gray Foster.

August 1 1863: IV Corps (Virginia and North Carolina) was discontinued, and its forces assigned to XVIII Corps (Virginia and North Carolina). VII Corps (Virginia and North Carolina) was discontinued, and its forces assigned to XVIII Corps (Virginia and North Carolina).

August 14 1863: Major-General John James Peck assumed command of XVIII Corps (Virginia and North Carolina), succeeding Brigadier-General Innis Newton Palmer.

August 16 1863: XVIII Corps (Virginia and North Carolina) transferred from the Department of Virginia and North Carolina to the Army of North Carolina.

Army of North Carolina

(Established, August 16 1863-April 25 1864, discontinued)

John James Peck (August 16 1863-April 25 1864)

August 16 1863: The Army of North Carolina was established in the Department of Virginia and North Carolina. Major-General John James Peck assumed command of the Army of North Carolina.

April 25 1864: The Army of North Carolina was discontinued, and its field forces transferred to the Department of Virginia and North Carolina. XVIII Corps North Carolina transferred from the Army of North Carolina to the Department of Virginia and North Carolina.

XVIII Corps North Carolina

(Transferred from Department of Virginia and North Carolina, August 16 1863-April 25 1864, transferred to Department of Virginia and North Carolina)

John Gray Foster (August 16 1863-November 10 1863), Benjamin Franklin Butler (November 11 1863-April 25 1864)

August 16 1863: XVIII Corps (Virginia and North Carolina) transferred from the Department of Virginia and North Carolina to the Army of North Carolina. Major-General John Gray Foster assumed command of XVIII Corps (Army of North Carolina) succeeding Major-General John James Peck.

November 11 1863: Major-General Benjamin Franklin Butler assumed command of XVIII Corps (North Carolina), succeeding Major-General John Gray Foster.

April 25 1864: XVIII Corps North Carolina transferred from the discontinued Army of North Carolina to the Department of Virginia and North Carolina.

XVIII Corps Virginia and North Carolina

(Transferred from Army of North Carolina, April 25 1864-May 2 1864, transferred to Army of the James)

Benjamin Franklin Butler (April 25 1864-May 2 1864)

April 25 1864: XVIII Corps (North Carolina) transferred from the discontinued Army of North Carolina to the Department of Virginia and North Carolina. Major-General Benjamin Franklin Butler retained command of XVIII Corps (Virginia and North Carolina).

May 2 1864: XVIII Corps transferred from the Department of Virginia and North Carolina to the Army of the James.

Army of the James

(Established, April 28 1864-January 18 1865, transferred to Department of Virginia)

Benjamin Franklin Butler (April 28 1864-January 7 1865), Edward Otho Cresap Ord (January 8 1865-January 18 1865)

April 28 1864: The Army of the James was established in the Department of Virginia and North Carolina. Major-General Benjamin Franklin Butler assumed command of the Army of the James. X Corps (South) transferred from the Department of the South to the Army of the James.

May 2 1864: XVIII Corps (Virginia and North Carolina) transferred from the Department of Virginia and North Carolina to the Army of the James.

December 3 1864: X Corps (James) was discontinued. XVIII Corps (James) was discontinued. XXIV Corps was established in the Army of the James. XXV Corps was established in the Army of the James by consolidating the black divisions of X Corps and XVIII Corps.

January 8 1865: Major-General Edward Otho Cresap Ord assumed command of the Army of the James, succeeding Major-General Benjamin Franklin Butler.

January 18 1865: The Army of the James transferred interim from the Department of Virginia and North Carolina to the Department of Virginia. XXIV Corps (James) transferred with the Army of the James to the Department of Virginia. XXV Corps (James) transferred with the Army of the James to the Department of Virginia.

X Corps James

(Transferred from Department of the South, April 28 1864-December 3 1864, discontinued, to XXIV Corps James)

Alfred Howe Terry (temporary April 28 1864-May 3 1864), Quincy Adam Gillmore (May 4 1864-June 13 1864), Alfred Howe Terry (temporary June 14 1864-June 20 1864), William Thomas Harbaugh Brooks (temporary June 21 1864-July 13 1864), Alfred Howe Terry (temporary July 14 1864-July 20 1864), Edward Otho Cresap Ord (July 21 1864-July 22 1864), David Bell Birney (July 23 1864-October 9 1864), Alfred Howe Terry (October 10 1864-November 3 1864), Adelbert Ames (temporary November 4 1864-Novmber 17 1864), Alfred Howe Terry (November 18 1864-December 3 1864)

April 28 1864: X Corps (South) transferred from the Department of the South to the Army of the James. Brigadier-General Alfred Howe Terry assumed temporary command of X Corps (James), succeeding Major-General Quincy Adams Gillmore.

May 4 1864: Major-General Quincy Adams Gillmore assumed command of X Corps (James), succeeding Brigadier-General Alfred Howe Terry.

June 14 1864: Brigadier-General Alfred Howe Terry assumed temporary command of X Corps (James), succeeding Major-General Quincy Adams Gillmore.

June 21 1864: Brigadier-General William Thomas Harbaugh Brooks assumed temporary command of X Corps (James), succeeding Brigadier-General Alfred Howe Terry.

July 14 1864: Brigadier-General Alfred Howe Terry assumed temporary command of X Corps (James), succeeding Brigadier-General William Thomas Harbaugh Brooks.

July 21 1864: Major-General Edward Otho Cresap Ord assumed command of X Corps (James), succeeding Brigadier-General Alfred Howe Terry.

July 23 1864: Major-General David Bell Birney assumed command of X Corps (James), succeeding Major-General Edward Otho Cresap Ord.

October 10 1864: Major-General Alfred Howe Terry assumed command of X Corps (James), succeeding Major-General David Bell Birney.

November 4 1864: Brigadier-General Adelbert Ames assumed temporary command of X Corps (James), succeeding Major-General Alfred Howe Terry.

November 18 1864: Major-General Alfred Howe Terry assumed command of X Corps (James), succeeding Brigadier-General Adelbert Ames.

December 3 1864: X Corps (James) was discontinued. XXV Corps was established in the Army of the James by consolidating the black divisions of X Corps (James) and XVIII Corps (James).

XVIII Corps James

(Transferred from Department of Virginia and North Carolina, May 2 1864-December 3 1864, discontinued, to XXV Corps James)

William Farrar Smith (May 2 1864-July 9 1864), John Henry Martindale (temporary July 10 1864-July 20 1864), Edward Otho Cresap Ord (July 21 1864-September 3 1864), John Gibbon (temporary September 4 1864-September 21 1864), Edward Otho Cresap Ord (September 22 1864-September 28 1864), Charles Adam Heckman (temporary September 29 1864-September 30 1864), Godfrey Weitzel (October 1 1864-December 3 1864)

May 2 1864: XVIII Corps transferred from the Department of Virginia and North Carolina to the Army of the James. William Farrar Smith assumed command of XVIII Corps (James), succeeding Major-General Benjamin Franklin Butler.

July 10 1864: Brigadier-General John Henry Martindale assumed temporary command of XVIII Corps (James), succeeding Major-General William Farrar Smith.

July 21 1864: Major-General Edward Otho Cresap Ord assumed command of XVIII Corps (James), succeeding Brigadier-General John Henry Martindale.

September 4 1864: Major-General John Gibbon assumed temporary command of XVIII Corps (James), succeeding Major-General Edward Otho Cresap Ord.

September 22 1864: Major-General Edward Otho Cresap Ord assumed command of XVIII Corps (James), succeeding Major-General John Gibbon.

September 29 1864: Brigadier-General Charles Adam Heckman assumed temporary command of XVIII Corps (James), succeeding Major-General Edward Otho Cresap Ord.

October 1 1864: Brigadier-General Godfrey Weitzel assumed command of XVIII Corps (James), succeeding Brigadier-Charles Adam Pleasant Heckman.

December 3 1864: XVIII Corps (James) was discontinued. XXV Corps was established in the Army of the James by consolidating the black divisions of X Corps and XVIII Corps.

XXIV Corps James

(Established, from X Corps James, December 3 1864-January 18 1865, transferred to Department of Virginia)

Edward Otho Cresap Ord December 3 1864-December 5 1864), Alfred Howe Terry (December 6 1864-January 1 1865), Charles Devens (temporary January 2 1865-January 14 1865), John Gibbon (January 15 1865)

December 3 1864: XXIV Corps was established in the Army of the James. Major-General Edward Otho Cresap Ord assumed command of XXIV Corps (James).

December 6 1864: Brigadier-General Alfred Howe Terry assumed command of XXIV Corps (James), succeeding Major-General Edward Otho Cresap Ord.

January 2 1865: Brigadier-General Charles Devens assumed temporary command of XXIV Corps (James), succeeding Major-General Alfred Howe Terry.

January 15 1865: Major-General John Gibbon assumed command of XXIV Corps (James), succeeding Brigadier-General Charles Devens.

January 18 1865: XXIV Corps (James) transferred with the Army of the James from the Department of Virginia and North Carolina to the Department of Virginia.

XXV Corps James

(Established, from X Corps James and XVIII Corps James, December 3 1864-January 18 1865, transferred to Department of Virginia)

Godfrey Weitzel (December 3 1864-December 31 1864), Charles Adam Heckman (January 1 1865-January 18 1865)

December 3 1864: XXV Corps (James) was established in the Army of the James by consolidating the black divisions from X Corps (James) and XVIII Corps (James). Major-General Godfrey Weitzel assumed command of XXV Corps (James).

January 1 1865: Brigadier-General Charles Adam Heckman assumed command of XXV Corps (James) succeeding Major-General Godfrey Weitzel.

January 18 1865: XXV Corps (James) transferred with the Army of the James from the Department of Virginia and North Carolina to the Department of Virginia.

Terry’s Provisional Corps Virginia and North Carolina

(Established, from X Corps (James) January 6 1865-January 18 1865, to Department of Virginia)

Alfred Howe Terry (January 6 1865-January 18 1865)

January 6 1865: Terry’s Provisional Corps was established in the Department of Virginia and North Carolina; comprising parts of the former X Corps (James). Brigadier-General Alfred Howe Terry assumed command of Terry’s Provisional Corps (Virginia and North Carolina).

January 18 1865: Terry’s Provisional Corps transferred from the Department of Virginia and North Carolina to the Department of Virginia.

Part 3f: Eastern and Capital Theatre

Summary

This theatre broadly covers the states of Virginia, Maryland, Delaware, Pennsylvania, West Virginia, District of Columbia and adjacent operational regions.

Operations in the theatre were dominated by the fact that the two capitals at Washington, DC, and Richmond, Virginia, were barely one hundred miles apart. Virginia inevitably became a primary theatre of the conflict as each belligerent sought to threaten the other’s capital city while defending its own. Each side had to provide for the defence of its capital, but the urgency was greater on the Union side, tying down large forces to occupy Washington’s extensive fortifications and to counter Confederate diversions and threats.

The Union had to take the strategic initiative and attempted several overland advances towards Richmond, with occasional efforts made from the coast along the James River and Yorktown Peninsula. The Confederates responded aggressively and made diversionary advances and invasions towards Washington and across the Potomac River into Union territory. This required the Union to make continual adjustments to the military organisation north of the Potomac, which could raise short-term forces, forestall and react to raids, and provide security for the Northern hinterland.

At times Union forces based on either side of the James River synchronised their operations with the main Army of the Potomac, but more frequently they were focused on guarding and extending the garrisons established along the Virginia and North Carolina coasts. They could harass and make diversionary operations, but it was not until Spring 1864 that the integration of overland and coastal operations was accomplished. The primary instrument for action in this sector was the Department of Virginia, initially established in May 22 1861 only to hold Fortress Monroe but expanding to become a major force. In July 1863 it was merged with the Department of North Carolina into a new Department of Virginia and North Carolina, so that operations along the Atlantic coast and rivers in both states could be coordinated more efficiently.

Both sides engaged continually in operations in the Shenandoah Valley and the mountainous region of western Virginia. The Valley was an important source of supplies for the Confederates and offered a covered line of advance into Union territory, an advantage that was exploited effectively in 1862, 1863, and 1864. The general south-westward orientation of the valley meant that any Union advance would gradually diverge and dissipate forces away from the main axis between Washington and Richmond.

Western Virginia was largely pro-Unionist and provided a base for Union operations towards prized natural resources and the vital East-West railroad line through eastern Tennessee and southwestern Virginia. The region was inaccessible to large forces and difficult either to occupy or defend but it constantly drew the attention of both sides. Difficult to conquer and garrison, there were many intense but short campaigns and raids. It was only in late 1864 and early 1865 that the Union forces were able to move in force out of the mountains into eastern Tennessee, southwestern Virginia and western North Carolina.

The defence of the national capital was always a sensitive issue as its loss would have led to disastrous political and diplomatic consequences. The Department of Washington was founded immediately in April 1861. In July 1861 it was subordinated to the Military Division and then converted into a District of the Department of the Potomac, to ensure that the security of the capital remained an integral responsibility for the main field forces in the eastern theatre. In February 1863, it was reinstated as the Department of Washington with its own Districts established for the defence of, and to provide logistical services around, the capital.

In the immediate crisis of the outbreak of war, short-lived organisations were formed partly in response to immediate or perceived threats and partly to provide a focal point for recruitment and training. These included the Department of Pennsylvania and the Department of the Shenandoah from April to August 1861, and the Department of Annapolis and its successor Department of Maryland from April to July 1861. These were swept away by McClellan as he consolidated centralised command in his Military Division, later Department of the Potomac. The field forces gathered for the first advance into Virginia in the early months of the war were assigned to the Department of Northeastern Virginia in May 27 1861 as the Army of Northeastern Virginia, and it was clearly differentiated from the capital’s defence force. After the defeat at First Bull Run, in July 1861, the Military Division of the Potomac replaced the Department. In August 1861, the Department of the Potomac and the Army of the Potomac, always the largest single field force, were created and remained operational until June 1865. This command was the constant fixation of government, press and people, and it became all but synonymous with the conduct of the war in the eastern theatre.

Department of Washington

(Established, April 9 1861-July 25 1861, transferred to Military Division of the Potomac)

Charles Ferguson Smith (April 9 1861-April 21 1861), Robert Patterson (April 22 1861-April 26 1861 interim April 27 1861), Joseph King Fenno Mansfield (April 27 1861-July 25 1861)

April 9 1861: The Department of Washington was established, comprising the original boundaries of the District of Columbia (including Alexandria County, Virginia) and the state of Maryland as far south as Bladensburg, taken from the Department of the East. Lieutenant-Colonel Charles Ferguson Smith was appointed to command the Department of Washington, arriving on 10th April 1861. Colonel Charles W Sandford took de facto temporary command of all field forces on the Virginia side of the Potomac River.

April 10 1861: Lieutenant-Colonel Charles Ferguson Smith arrived to command the Department of Washington.

April 19 1861: The states of Pennsylvania and Delaware were transferred from the Department of the East to the Department of Washington.

April 22 1861: Pennsylvania State Major-General Robert Patterson assumed command of the Department of Washington.

April 27 1861: The Department of Washington was extended to include the District of Columbia, and Maryland as far as Fort Washington and Bladensburg, Maryland. Pennsylvania and Delaware were transferred from the Department of Washington to the Department of Pennsylvania. Colonel Joseph King Fenno Mansfield was appointed to command the Department of Washington, arriving on 28th April 1861.

April 28 1861: Colonel Joseph King Fenno Mansfield arrived to assume command of the Department of Washington, succeeding Pennsylvania State Major-General Robert Patterson.

July 25 1861: The Department of Washington transferred to the Military Division of the Potomac. Prince George’s, Montgomery and Frederick counties of Maryland were transferred from the Department of Pennsylvania to the Department of Washington.

Department of Annapolis

(Established, April 27 1861-July 19 1861, discontinued, to Department of Maryland)

Benjamin Franklin Butler, George Cadwalader (April 27 1861-May 15 1861), John Adams Dix (May 16 1861-May 31 1861 interim June 10 1861), Nathaniel Prentiss Banks (June 1 1861-July 19 1861)

April 27 1861: The Department of Annapolis was established to include the counties 20 miles each side of the Baltimore and Washington railroad from Annapolis as far as Bladensburg, Maryland. Massachusetts State Brigadier-General Benjamin Franklin Butler was appointed to command the Department of Annapolis but did not arrive to take command.

May 15 1861: Pennsylvania State Major-General George Cadwalader assumed command of the Department of Annapolis, succeeding Major-General Benjamin Franklin Butler who had not assumed command.

May 16 1861: Major-General John Adams Dix assumed command of the Department of Annapolis, succeeding State Major-General George Cadwalader.

June 1 1861: Major-General Nathaniel Prentiss Banks was appointed to command the Department of Annapolis, arriving on 11th June 1861, succeeding Major-General John Adams Dix.

June 11 1861: Major-General Nathaniel Prentiss Banks arrived to command the Department of Annapolis, succeeding Major-General John Adams Dix.

July 19 1861: The Department of Annapolis was discontinued, and reorganised as the Department of Maryland.

Department of Pennsylvania

(Established, April 27 1861-August 17 1861, discontinued, to Department of the Potomac)

Robert Patterson (April 27 1861-August 17 1861)

April 27 1861: The Department of Pennsylvania was established with headquarters at Philadelphia, comprising Pennsylvania, Delaware and parts of Maryland not in the Department of Washington and the Department of Annapolis. Pennsylvania and Delaware were transferred from the Department of Washington to the Department of Pennsylvania. Pennsylvania State Major-General Robert Patterson assumed command of the Department of Pennsylvania.

May 9 1861: The Department of the Ohio was extended to include the parts of Pennsylvania and Virginia north of the Kanawha River and west of the Greenbrier River, and on a line drawn from the Greenbrier River to the southwest corner of Maryland, then to the Pennsylvania border and to the northeast corner of McKean county, Pennsylvania, to its existing territory of Illinois, Ohio and Indiana. These territories were detached from the Department of the East and the Department of Pennsylvania.

June 2 1861: The Army of the Shenandoah (also known unofficially as the “Army of Pennsylvania”) was established in the Department of Pennsylvania.

July 25 1861: Prince George’s, Montgomery and Frederick counties of Maryland were transferred from the Department of Pennsylvania to the Department of Washington. Washington and Allegheny counties of Maryland were transferred from the Department of Pennsylvania to the Department of the Shenandoah. The Department of Maryland was discontinued, and incorporated into the Department of Pennsylvania. All the parts of Pennsylvania in the Department of the Ohio were transferred to the Department of Pennsylvania. All the parts of Pennsylvania in the Department of Maryland were transferred to the Department of Pennsylvania. Major-General John Adams Dix assumed command of the Department of Pennsylvania, succeeding State Major-General Robert Patterson.

August 17 1861: The Department of Pennsylvania was discontinued, and incorporated into the Department of the Potomac. The state of Pennsylvania remained under state command. The Army of the Shenandoah was discontinued, and its forces transferred to the Army of the Potomac.

Army of the Shenandoah

(Established, June 2 1861-August 17 1861, discontinued, to Army of the Potomac)

Robert Patterson (June 2 1861-July 27 1861)

June 2 1861: The Army of the Shenandoah (also known unofficially as the “Army of Pennsylvania”) was established in the Department of Pennsylvania. Pennsylvania State Major-General Robert Patterson assumed command of the Army of the Shenandoah.

July 27 1861: Command of the Army of the Shenandoah became vacant when Pennsylvania State Major-General Robert Patterson mustered out.

August 17 1861: The Army of the Shenandoah was discontinued, and its forces transferred to the Army of the Potomac.

Department of Virginia

(Established, May 22 1861-July 15 1863, discontinued, to Department of Virginia and North Carolina)

Benjamin Franklin Butler (May 22 1861-August 8 1861 interim August 16 1861), John Ellis Wool (August 9 1861-June 1 1862 interim June 16 1862), John Adams Dix (June 2 1862-April 5 1863), Erasmus Darwin Keyes (April 6 1863-July 15 1863)

May 22 1861: The Department of Virginia was established with headquarters at Fortress Monroe, comprising the territory of Virginia within sixty miles of Fort Monroe, detached from the Department of the East. It also assumed authority over any territories of North Carolina and South Carolina to be occupied by Union forces. Major-General Benjamin Franklin Butler assumed command of the Department of Virginia.

August 9 1861: Brigadier-General John Ellis Wool was appointed to command the Department of Virginia, arriving on 17th August 1861, to succeed Major-General Benjamin Franklin Butler.

August 17 1861: Brigadier-General John Ellis Wool arrived to command the Department of Virginia, succeeding Major-General Benjamin Franklin Butler.

June 1 1862: The parts of Virginia south of the Rappahannock River and east of the Fredericksburg & Richmond Railroad were transferred from the Department of the Potomac to the Department of Virginia.

June 1 1862: Major-General George Brinton McClellan was appointed to command the Department of Virginia but did not arrive to take command.

June 2 1862: Major-General John Adams Dix was appointed to command the Department of Virginia, arriving on 17th June 1861, succeeding Major-General John Ellis Wool.

June 17 1862: Major-General John Adams Dix arrived to command the Department of Virginia, succeeding Major-General Benjamin Franklin Butler.

July 22 1862: VII Corps (Virginia) was established in the Department of Virginia, comprising forces based at Fortress Monroe, Camp Hamilton, Norfolk, Suffolk, Portsmouth and Yorktown in Virginia.

August 3 1862: IX Corps transferred from the Army of the Potomac to the Department of Virginia.

August 16 1862: IV Corps (Potomac) transferred from the Army of the Potomac to the Department of Virginia.

September 3 1862: IX Corps (Virginia) transferred from the Department of Virginia to the Army of the Potomac.

February 5 1863: IX Corps Potomac transferred from the Army of the Potomac to the Department of Virginia.

March 17 1863: IX Corps transferred from the Department of Virginia to the Department of the Ohio.

April 6 1863: Major-General Erasmus Darwin Keyes assumed command of the Department of Virginia, succeeding Major-General John Adams Dix.

July 15 1863: The Department of Virginia was discontinued, and its territory transferred to the Department of Virginia and North Carolina. IV Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina. VII Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina.

VII Corps Virginia

(Established, July 22 1862-July 15 1863, transferred to Department of Virginia and North Carolina)

John Adams Dix (July 22 1862-July 15 1863)

July 22 1862: VII Corps (Virginia) was established in the Department of Virginia, comprising forces based at Fortress Monroe, Camp Hamilton, Norfolk, Suffolk, Portsmouth and Yorktown in Virginia. Major-General John Adams Dix assumed command of VII Corps (Virginia).

July 15 1863: VII Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina.

IX Corps Virginia

(Transferred from Army of the Potomac, August 3 1862-September 3 1862, transferred to Army of the Potomac)

Ambrose Everett Burnside (August 3 1862-September 3 1862)

August 3 1862: IX Corps transferred from the Army of the Potomac to the Department of Virginia. Major-General Ambrose Everett Burnside retained command of IX Corps (Virginia).

September 3 1862: IX Corps (Virginia) transferred from the Department of Virginia to the Army of the Potomac.

IV Corps Virginia

(Transferred from Army of the Potomac, August 16 1862-July 15 1863, transferred to Department of Virginia and North Carolina)

Erasmus Darwin Keyes (August 16 1862-July 15 1863)

August 16 1862: IV Corps (Potomac) transferred from the Army of the Potomac to the Department of Virginia. Major-General Erasmus Darwin Keyes retained command of IV Corps (Virginia).

July 15 1863: IV Corps (Virginia) transferred from the Department of Virginia to the Department of Virginia and North Carolina.

IX Corps Virginia

(Transferred from Army of the Potomac, February 5 1863-March 17 1863, transferred to Department of the Ohio)

William Farrar Smith (February 5 1863-March 7 1863), Orlando Bolivar Willcox (temporary March 8 1863-March 17 1863)

February 5 1863: IX Corps Potomac transferred from the Army of the Potomac to the Department of Virginia. Major-General William Farrar Smith assumed command of IX Corps (Virginia).

March 8 1863: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Virginia), succeeding Brigadier-General William Farrar Smith.

March 17 1863: IX Corps transferred from the Department of Virginia to the Department of the Ohio.

Department of Northeastern Virginia

(Established, May 27 1861-July 25 1861, transferred to Military Division of the Potomac)

Irvin McDowell (May 27 1861-July 25 1861)

May 27 1861: The Department of Northeastern Virginia was established, comprising the part of Virginia east of the Allegheny Mountains and north of the James River, and west of the existing Department of Virginia (within sixty miles of Fort Monroe). Its territory was detached from the Department of the East. Brigadier-General Irvin McDowell was appointed to command the Department of Northeastern Virginia, arriving on May 28 1861.

May 28 1861: Brigadier-General Irvin McDowell arrived to assume command of the Department of Northeastern Virginia.

July 8 1861: The Army of Northeastern Virginia was established in the Department of Northeastern Virginia.

July 25 1861: The Department of Northeastern Virginia transferred to the Military Division of the Potomac.

Army of Northeastern Virginia

(Established, July 8 1861-July 25 1861, discontinued, to Army of the Potomac)

Irvin McDowell (July 8 1861-July 25 1861)

July 8 1861: The Army of Northeastern Virginia was established in the Department of Northeastern Virginia. Brigadier-General Irvin McDowell assumed command of the Army of Northeastern Virginia.

July 25 1861: The Army of Northeastern Virginia was discontinued, and renamed the Army of the Potomac.

Department of Maryland

(Established, from Department of Annapolis, July 19 1861-July 25 1861, discontinued, to Department of Pennsylvania)

John Adams Dix (July 19 1861-July 25 1861)

July 19 1861: The Department of Annapolis was discontinued, and reorganised as the Department of Maryland. The Department of Maryland was established, comprising the counties ten miles each side of the Baltimore and Washington railroad from Annapolis as far as Bladensburg, Maryland. Major-General John Adams Dix was appointed to command the Department of Maryland, arriving on 23rd July 1861.

July 23 1861: Major-General John Adams Dix arrived to command the Department of Maryland.

July 25 1861: The Department of Maryland was discontinued, and incorporated into the Department of Pennsylvania. All the parts of Pennsylvania in the Department of Maryland were transferred to the Department of Pennsylvania.

Department of the Shenandoah

(Established, July 19 1861-August 17 1861, discontinued, to Department of the Potomac)

Nathaniel Prentiss Banks (July 19 1861-August 17 1861)

July 19 1861: The Department of the Shenandoah was established, comprising the Shenandoah Valley of Virginia, taken from the Department of the East. Major-General Nathaniel Prentiss Banks was appointed to command the Department of the Shenandoah, arriving on 25th July 1861. The remainder of Kentucky and the state of Tennessee not already assigned were detached from the Department of the East and assigned to the Department of the Shenandoah.

July 25 1861: Washington and Allegheny counties of Maryland were transferred from the Department of Pennsylvania to the Department of the Shenandoah. Major-General Nathaniel Prentiss Banks arrived to command the Department of the Shenandoah.

August 17 1861: The Department of the Shenandoah was discontinued, and its territory incorporated into the Department of the Potomac.

Military Division of the Potomac

(Established, July 25 1861-August 17 1861, discontinued, to Department of the Potomac)

George Brinton McClellan (July 25 1861-August 17 1861)

July 25 1861: The Military Division of the Potomac was established, comprising the Department of Washington and the Department of Northeastern Virginia. Major-General George Brinton McClellan was appointed to command the Military Division of the Potomac, arriving on 27th July 1861.

July 27 1861: Major-General George Brinton McClellan arrived to command the Military Division of the Potomac.

August 17 1861: The Military Division of the Potomac was discontinued.

Department of Washington

(Transferred to Military Division of the Potomac, July 25 1861-August 17 1861, discontinued, to Department of the Potomac)

Joseph King Fenno Mansfield (July 25 1861-August 17 1861)

July 25 1861: The Department of Washington transferred to the Military Division of the Potomac. Prince George’s, Montgomery and Frederick counties of Maryland were transferred from the Department of Pennsylvania to the Department of Washington. Brigadier-General Joseph King Fenno Mansfield retained command of the Department of Washington.

August 17 1861: The Department of Washington was discontinued, and incorporated into the Department of the Potomac.

Department of Northeastern Virginia

(Transferred to Military Division of the Potomac, July 25 1861-August 17 1861, discontinued, to Department of the Potomac)

Irvin McDowell (July 25 1861-August 17 1861)

July 25 1861: The Department of Northeastern Virginia transferred to the Military Division of the Potomac. Brigadier-General Irvin McDowell retained command of the Department of Northeastern Virginia.

August 17 1861: The Department of Northeastern Virginia was discontinued, and incorporated into the Department of the Potomac.

Army of the Potomac

(Established, from Army of Northeastern Virginia, July 25 1861-August 20 1861, transferred to Department of the Potomac)

Irvin McDowell (July 25 1861-August 20 1861)

July 25 1861: The Army of Northeastern Virginia was discontinued, and renamed the Army of the Potomac. The Army of the Potomac was established in the Department of Northeastern Virginia. Major-General Irvin McDowell assumed command of the Army of the Potomac.

August 15 1861: The Army of Northeastern Virginia was formally discontinued, having already been re-designated the Army of the Potomac.

August 17 1861: The Army of the Shenandoah was discontinued, and its forces transferred to the Army of the Potomac.

August 20 1861: The Army of the Potomac transferred to the Department of the Potomac.

Department of the Potomac

(Established, from Military Division of the Potomac, August 17 1861-April 19 1865, transferred to Military Division of the James)

Irvin McDowell (interim August 17 1861-August 19 1861), George Brinton McClellan August 17 1861-November 4 1862 interim November 6 1862, Ambrose Everett Burnside (November 5 1862-January 24 1863 interim January 25 1863), Joseph Hooker (January 25 1863-June 26 1863 interim 27 1863), George Gordon Meade (June 27 1863-December 19 1863), John Grubb Parke (temporary December 20 1864-January 10 1865), George Gordon Meade (January 11 1865-April 19 1865)

August 17 1861: The Department of the Potomac was established, comprising the states of Delaware and Maryland, the District of Columbia, the Shenandoah Valley in Virginia and Virginia east of the Allegheny Mountains and north of the James River, except for a 60-mile radius around Fort Monroe. Its territory was taken from the Department of Pennsylvania, the Department of Washington, the Department of the Shenandoah, and the Department of Northeastern Virginia. The Department of Northeastern Virginia was discontinued, and incorporated into the Department of the Potomac. The Department of Pennsylvania was discontinued, and incorporated into the Department of the Potomac. Pennsylvania remained under independent state command. The Department of the Shenandoah was discontinued, and incorporated into the Department of the Potomac. The Department of Washington was discontinued, and incorporated into the Department of the Potomac. Major-General George Brinton McClellan was appointed to command the Department of the Potomac, arriving on 20th August 1861. Major-General Irvin McDowell retained interim command of the Department of the Potomac.

August 20 1861: Major-General George Brinton McClellan arrived to command the Department of the Potomac, succeeding Brigadier-General Irvin McDowell. The Army of the Potomac transferred to the Department of the Potomac.

October 20 1861: The District of Harper’s Ferry and Cumberland was established in the Department of the Potomac, responsible for the railroad from Harper’s Ferry, Virginia, to Cumberland, Maryland, including a strip of land twenty miles wide along the south bank of the Potomac River.

November 9 1861: The territory of Virginia west of the Blue Ridge Mountains transferred to the Department of Western Virginia from the Department of the Potomac.

February 1 1862: The state of New Jersey transferred from the Department of New York to the Department of the Potomac. The state of Pennsylvania was incorporated into the Department of the Potomac.

March 3 1862: The territory west of Flintstone Creek, Maryland, South Branch Mountain, North Shenandoah Mountain, Purgatory Mountain, Blue Ridge Mountain and Allegheny Mountain were transferred from the Department of the Potomac to the Department of Western Virginia.

March 12 1862: The District of Harper’s Ferry and Cumberland was discontinued. The Military District of Washington was established as an independent command under the War Department, comprising the District of Columbia, Alexandria in Virginia and Port Washington.

March 17 1862: Major-General George Brinton McClellan was temporarily suspended as General-in-Chief of the US Army, permitting him to exercise direct field command of the Amy of the Potomac.

March 22 1862: New Jersey, Pennsylvania, Delaware, the Eastern Shore of Maryland and of Virginia, and Cecil, Hartford, Baltimore and Anne Arundel counties of Maryland were transferred from the Department of the Potomac to the Middle Department.

April 4 1862: Virginia east of the Blue Ridge and west of the Fredericksburg & Richmond Railroad, Washington and the District of Columbia and the part of Maryland between the Potomac and Patuxent Rivers, transferred from the Department of the Potomac. The territory of Maryland between the Potomac and Patuxent Rivers, the District of Columbia and Virginia east of the Blue Ridge Mountains and west of the Fredericksburg & Richmond Railroad transferred from the Department of the Potomac to the Department of the Rappahannock. I Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Rappahannock. The Military District of Washington transferred to the Department of the Rappahannock. The parts of Maryland and Virginia west of the Blue Ridge Mountains and east of the Mountain Department transferred from the Department of the Potomac to the Department of the Shenandoah. V Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Shenandoah.

June 1 1862: The parts of Virginia south of the Rappahannock River and east of the Fredericksburg & Richmond Railroad were transferred from the Department of the Potomac to the Department of Virginia. The territory of north-eastern Virginia transferred from the Department of the Potomac to the Department of the Rappahannock.

September 2 1862: The Army of Virginia transferred to the Department of the Potomac.

September 3 1862: IX Corps (Virginia) transferred from the Department of Virginia to the Army of the Potomac.

September 12 1862: The Army of Virginia was discontinued, and its forces incorporated into the Army of the Potomac. III Corps (Virginia) was discontinued, and incorporated into I Corps (Potomac). I Corps (Potomac) was established, comprising the forces of the discontinued III Corps (Army of Virginia). I Corps (Virginia) was discontinued, and incorporated into XI Corps (Potomac). XI Corps was established in the Army of the Potomac, comprising the forces of the discontinued I Corps (Virginia). II Corps (Virginia) was discontinued, and incorporated into XII Corps (Potomac). XII Corps was established in the Army of the Potomac, comprising the forces of the discontinued II Corps (Virginia).

September 19 1862: Western Virginia transferred from the Department of the Potomac to the Department of the Ohio.

November 5 1862: Major-General Ambrose Everett Burnside was appointed to command the Department of the Potomac, arriving on 7th November 1862. Major-General Ambrose Everett Burnside was appointed to command the Army of the Potomac, arriving on 7th November 1862.

November 7 1862: Major-General Ambrose Everett Burnside arrived to command the Department of the Potomac, succeeding Major-General George Brinton McClellan.

January 25 1863: Major-General Joseph Hooker was appointed to command the Department of the Potomac, arriving on 26th January 1863.

January 26 1863: Major-General Joseph Hooker arrived to command the Department of the Potomac, succeeding Major-General Ambrose Everett Burnside.

February 2 1863: The country north of the Potomac River in Maryland from Piscataway Creek to Annapolis Junction, to the mouth of the Monocacy River and south by Goose Creek and the mouth of the Bull Run Mountains to the mouth of the Occoquan Creek, transferred from the Department of the Potomac to the Department of Washington.

June 27 1863: Major-General George Gordon Meade was appointed to command the Department of the Potomac, to succeed Major-General Joseph Hooker, arriving on 28th June 1863.

June 28 1863: Major-General George Gordon Meade arrived to command the Department of the Potomac, succeeding Major-General Joseph Hooker.

August 3 1863: The territory of Maryland west of the Monocacy River and the territory around Harper’s Ferry were transferred from the Middle Department and the Department of the Potomac to the Department of West Virginia.

April 13 1864: IX Corps (Ohio) transferred from the Army of the Ohio to the Department of the Potomac.

May 24 1864: IX Corps (Potomac) was officially transferred from the Department of the Potomac to the Army of the Potomac.

June 21 1864: The part of Maryland between the Potomac and Patuxent Rivers transferred from the Department of the Potomac to the Department of Washington.

December 20 1864: Major-General John Grubb Parke assumed temporary command of the Department of the Potomac, succeeding Major-General George Gordon Meade.

January 11 1865: Major-General George Gordon Meade assumed command of the Department of the Potomac, succeeding Major-General John Grubb Parke.

March 26 1865: Sheridan’s Cavalry Command was established in the Department of the Potomac.

April 19 1865: The Military Division of the James was established to comprise the Department of Virginia and the Department of the Potomac. The Department of the Potomac transferred to the Military Division of the James. The Army of the Potomac transferred with the Department of the Potomac to the Military Division of the James. Sheridan’s Cavalry Command (Potomac) transferred with the Department of the Potomac to the Military Division of the James. Cavalry Corps (Potomac) transferred with Sheridan’s Cavalry Command (Potomac) to the Military Division of the James.

District of Harper’s Ferry and Cumberland

(Established, October 20 1861-March 12 1862, discontinued)

Frederick West Lander (October 20 1861-October 21 1861), Benjamin Franklin Kelley (temporary October 22 1861-November 30 1861), Frederick West Lander (December 1 1861-March 1 1862), James Shields (March 2 1862-March 12 1862)

October 20 1861: The District of Harper’s Ferry and Cumberland was established in the Department of the Potomac, responsible for the railroad from Harper’s Ferry, Virginia, to Cumberland, Maryland, including a strip of land twenty miles wide along the south bank of the Potomac River. Brigadier-General Frederick West Lander assumed command of the District of Harper’s Ferry and Cumberland.

October 22 1861: Brigadier-General Benjamin Franklin Kelley assumed temporary command of the District of Harper’s Ferry and Cumberland, succeeding Brigadier-General Frederick West Lander.

December 1 1861: Brigadier-General Frederick West Lander assumed command of the District of Harper’s Ferry and Cumberland, succeeding Brigadier-General Benjamin Franklin Kelley.

March 2 1862: Brigadier-General James Shields assumed temporary command of the District of Harper’s Ferry and Cumberland, succeeding the late Brigadier-General Frederick West Lander.

March 12 1862: The District of Harper’s Ferry and Cumberland was discontinued.

Army of the Potomac

(Transferred from Military Division of the Potomac, August 20 1861-April 19 1865)

George Brinton McClellan (August 20 1861-November 4 1862 interim November 6 1862), Ambrose Everett Burnside (November 5 1862-January 25 1863), Joseph Hooker (January 26 1863-June 27 1863), George Gordon Meade (June 28 1863-August 31 1864), John Grubb Parke (temporary September 1 1864-September 9 1864), George Gordon Meade (September 10 1864-December 29 1864), John Grubb Parke (temporary December 30 1864-January 10 1865), George Gordon Meade (January 11 1865-January 23 1865), John Grubb Parke (temporary January 24 1865-February 1 1865), George Gordon Meade (February 2 1865-February 21 1865), John Grubb Parke (temporary February 22 1865-February 27 1865), George Gordon Meade (February 28 1865-April 19 1865)

August 20 1861: The Army of the Potomac transferred from the Military Division of the Potomac to the Department of the Potomac. Major-General George Brinton McClellan assumed command of the Army of the Potomac, succeeding Major-General Irvin McDowell.

March 3 1862: I Corps (Potomac) was established in the Army of the Potomac. II Corps (Potomac) was established in the Army of the Potomac. III Corps (Potomac) was established in the Army of the Potomac. IV Corps (Potomac) was established in the Army of the Potomac. V Corps (Potomac) was established in the Army of the Potomac.

March 17 1862: Major-General George Brinton McClellan was temporarily suspended as General-in-Chief of the US Army, permitting him to exercise direct field command of the Amy of the Potomac.

April 4 1862: I Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Rappahannock. Although the title was officially discontinued, these field forces effectively remained and were later renamed as I Corps (Potomac). V Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Shenandoah.

May 18 1862: Provisional V Corps (Potomac) was established in the Army of the Potomac. Provisional VI Corps (Potomac) was established in the Army of the Potomac.

July 22 1862: V Provisional Corps (Potomac) was confirmed as a permanent organisation as V Corps (Potomac). VI Provisional Corps (Potomac) was confirmed as a permanent organisation as VI Corps (Potomac). IX Corps (Potomac) was established in the Army of the Potomac.

August 3 1862: IX Corps transferred from the Army of the Potomac to the Department of Virginia.

August 16 1862: IV Corps (Potomac) transferred from the Army of the Potomac to the Department of Virginia.

September 3 1862: IX Corps (Virginia) transferred from the Department of Virginia to the Army of the Potomac.

September 12 1862: The Army of Virginia was discontinued, and its forces incorporated into the Army of the Potomac. III Corps (Virginia) was discontinued, and incorporated into I Corps (Potomac). I Corps (Potomac) was established, comprising the discontinued III Corps (Army of Virginia). I Corps (Virginia) was discontinued, and incorporated into XI Corps (Potomac). XI Corps was established in the Army of the Potomac, comprising the discontinued I Corps (Virginia). II Corps (Virginia) was discontinued, and incorporated into XII Corps (Potomac). XII Corps was established in the Army of the Potomac, comprising the discontinued II Corps (Virginia).

November 5 1862: Major-General Ambrose Everett Burnside was appointed to command the Army of the Potomac, arriving on 7th November 1862.

November 7 1862: Major-General Ambrose Everett Burnside arrived to command the Army of the Potomac, succeeding Major-General George Brinton McClellan.

November 14 1862: The Army of the Potomac was reorganised into four Grand Divisions. The Centre Grand Division comprised III Corps (Potomac) and V Corps (Potomac). The Left Grand Division comprised I Corps (Potomac) and VI Corps (Potomac). The Right Grand Division comprised II Corps (Potomac) and IX Corps (Potomac). The Reserve Grand Division comprised XI Corps (Potomac) and XII Corps (Potomac).

January 26 1863: Major-General Joseph Hooker assumed command of the Army of the Potomac, succeeding Major-General Ambrose Everett Burnside.

February 5 1863: The Centre Grand Division of the Army of the Potomac was discontinued. The Right Grand Division of the Army of the Potomac was discontinued. The Left Grand Division of the Army of the Potomac was discontinued. The Reserve Grand Division of the Army of the Potomac was discontinued. IX Corps (Potomac) transferred from the Army of the Potomac to the Department of Virginia.

February 12 1863: Cavalry Corps (Potomac) was established in the Army of the Potomac.

June 28 1863: Major-General George Gordon Meade assumed command of the Army of the Potomac, succeeding Major-General Joseph Hooker.

September 25 1863: XI Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland). XII Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland).

March 24 1864: I Corps (Potomac) was discontinued, and its forces allocated to V Corps (Potomac). III Corps (Potomac) was discontinued, and its forces allocated to II Corps (Potomac) and VI Corps (Potomac).

May 24 1864: IX Corps transferred from the Department of the Potomac to the Army of the Potomac.

August 7 1864: VI Corps (Potomac) transferred from the Army of the Potomac to the Army of the Shenandoah.

September 1 1864: Major-General John Grubb Parke assumed temporary command of the Army of the Potomac, succeeding Major-General George Gordon Meade.

September 10 1864: Major-General George Gordon Meade assumed command of the Army of the Potomac, succeeding Major-General John Grubb Parke.

December 6 1864: December 6 1864: VI Corps (Shenandoah) transferred from the Army of the Shenandoah to the Army of the Potomac.

December 30 1864: Major-General John Grubb Parke assumed temporary command of the Army of the Potomac, succeeding Major-General George Gordon Meade.

January 11 1865: Major-General George Gordon Meade assumed command of the Army of the Potomac, succeeding Major-General John Grubb Parke.

January 24 1865: Major-General John Grubb Parke assumed temporary command of the Army of the Potomac, succeeding Major-General George Gordon Meade.

February 2 1865: Major-General George Gordon Meade assumed command of the Army of the Potomac, succeeding Major-General John Grubb Parke.

February 22 1865: Major-General John Grubb Parke assumed temporary command of the Army of the Potomac, succeeding Major-General George Gordon Meade.

February 28 1865: Major-General George Gordon Meade assumed command of the Army of the Potomac, succeeding Major-General John Grubb Parke.

March 26 1865: Sheridan’s Cavalry Command was established in the Department of the Potomac. It comprised the combined cavalry forces of the Army of the Potomac, the Army of the James and the Army of the Shenandoah.

March 26 1865: Cavalry Corps (Potomac) transferred from the Army of the Potomac to Sheridan’s Cavalry Command (Potomac).

April 19 1865: The Army of the Potomac transferred with the Department of the Potomac to the Military Division of the James. II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. IX Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. Cavalry Corps (Potomac) transferred with Sheridan’s Cavalry Command (Potomac) to the Military Division of the James.

I Corps Potomac

(Established, March 3 1862-April 4 1862, discontinued, to Department of the Rappahannock)

Irvin McDowell (March 3 1862-April 4 1862)

March 3 1862: I Corps (Potomac) was established in the Army of the Potomac. Brigadier-General Irvin McDowell assumed command of I Corps (Potomac).

April 4 1862: I Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Rappahannock. Although the title was officially discontinued, these field forces effectively remained and were later renamed as I Corps (Potomac)

II Corps Potomac

(Established, March 3 1862-November 14 1862, transferred to Right Grand Division Potomac)

Edwin Vose Sumner (March 3 1862-October 6 1862), Darius Nash Couch (October 7 1862-November 14 1862)

March 3 1862: II Corps (Potomac) was established in the Army of the Potomac. Brigadier-General Edwin Vose Sumner assumed command of II Corps (Potomac).

October 7 1862: Major-General Darius Nash Couch assumed command of II Corps (Potomac), succeeding Major-General Edwin Vose Sumner.

November 14 1862: II Corps (Potomac) transferred to the Right Grand Division of the Army of the Potomac.

III Corps Potomac

(Established, March 3 1862-November 14 1862, transferred to Centre Grand Division Potomac)

Samuel Peter Heintzelman (March 3 1862-October 19 1862), George Stoneman (October 20 1862-November 14 1862)

March 3 1862: III Corps (Potomac) was established in the Army of the Potomac. Brigadier-General Samuel Peter Heintzelman assumed command of III Corps (Potomac).

October 20 1862: Brigadier-General George Stoneman assumed command of III Corps (Potomac), succeeding Major-General Samuel Peter Heintzelman.

November 14 1862: III Corps (Potomac) transferred to the Centre Grand Division of the Army of the Potomac.

IV Corps Potomac

(Established, March 3 1862-August 16 1862, transferred to Department of Virginia)

Erasmus Darwin Keyes (March 3 1862-August 16 1862)

March 3 1862: IV Corps (Potomac) was established in the Army of the Potomac. Brigadier-General Erasmus Darwin Keyes assumed command of IV Corps (Potomac).

August 16 1862: IV Corps (Potomac) transferred from the Army of the Potomac to the Department of Virginia.

V Corps Potomac

(Established, March 3 1862-April 4 1862, discontinued, to Department of the Shenandoah)

Nathaniel Prentiss Banks (March 3 1862-April 4 1862)

March 3 1862: V Corps (Potomac) was established in the Army of the Potomac. Major-General Nathaniel Prentiss Banks assumed command of V Corps (Potomac).

April 4 1862: V Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Shenandoah.

V Provisional Corps Potomac

(Established, May 18 1862-July 22 1862, to V Corps Potomac)

Fitz-John Porter (May 18 1862-July 22 1862)

May 1862: Provisional V Corps (Potomac) was established in the Army of the Potomac. Brigadier-General Fitz-John Porter assumed command of V Corps (Potomac).

July 22 1862: V Provisional Corps (Potomac) was confirmed as V Corps (Potomac).

VI Provisional Corps Potomac

(Established, May 18 1862-July 22 1862, to VI Corps Potomac)

William Buel Franklin (May 18 1862-July 22 1862)

May 18 1862: Provisional VI Corps (Potomac) was established in the Army of the Potomac. Brigadier-General William Buel Franklin assumed command of VI Corps (Potomac).

July 22 1862: VI Provisional Corps (Potomac) was confirmed as VI Corps (Potomac).

V Corps Potomac

(Established, from V Provisional Corps Potomac, July 22 1862-November 14 1862, transferred to Centre Grand Division Potomac)

Fitz-John Porter (July 22 1862-November 9 1862), Joseph Hooker (November 10 1862-November 14 1862)

July 22 1862: V Provisional Corps (Potomac) was confirmed as V Corps (Potomac). Major-General Fitz-John Porter retained command V Corps (Potomac).

November 10 1862: Major-General Joseph Hooker assumed command of V Corps (Potomac, succeeding Major-General Fitz John Porter.

November 14 1862: V Corps (Potomac) transferred to the Centre Grand Division of the Army of the Potomac.

VI Corps Potomac

(Established, from VI Provisional Corps Potomac, July 22 182-November 14 1862, transferred to Left Grand Division Potomac)

William Buel Franklin (July 22 182-November 14 1862)

July 22 1862: VI Provisional Corps (Potomac) was confirmed as VI Corps (Potomac). Major-General William Buel Franklin retained command of VI Corps (Potomac).

November 14 1862: VI Corps (Potomac) transferred to the Left Grand Division of the Army of the Potomac.

IX Corps Potomac

(Established, July 22 1862-August 3 1862, transferred to Department of Virginia)

Ambrose Everett Burnside (July 22 1862-August 3 1862)

July 22 1862: IX Corps (Potomac) was established in the Army of the Potomac, comprising forces from the Department of the South that had participated in the Expedition to North Carolina. Major-General Ambrose Everett Burnside assumed command of IX Corps (Potomac).

August 3 1862: IX Corps transferred from the Army of the Potomac to the Department of Virginia.

Army of Virginia

(Transferred from War Department, September 2 1862-September 12 1862, discontinued to Army of the Potomac)

George Brinton McClellan (September 2 1862-September 12 1862)

September 2 1862: The Army of Virginia transferred to the Department of the Potomac. I Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. II Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. III Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. Major-General George Brinton McClellan assumed command of the Army of Virginia, succeeding Major-General John Pope.

September 12 1862: The Army of Virginia was discontinued, and its forces incorporated into the Army of the Potomac. III Corps (Virginia) was discontinued, and incorporated into I Corps (Potomac). I Corps (Potomac) was established, comprising the forces of the discontinued III Corps (Army of Virginia). I Corps (Virginia) was discontinued, and incorporated into XI Corps (Potomac). XI Corps was established in the Army of the Potomac, comprising the forces of the discontinued I Corps (Virginia). II Corps (Virginia) was discontinued, and incorporated into XII Corps (Potomac). XII Corps was established in the Army of the Potomac, comprising the forces of the discontinued II Corps (Virginia).

I Corps Virginia

(Transferred, from War Department, September 2 1862 September 12 1862, discontinued, to XI Corps Potomac)

Franz Sigel (September 2 1862 September 12 1862)

September 2 1862: I Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. Major-General Franz Sigel retained command of I Corps (Virginia).

September 12 1862: I Corps (Virginia) was discontinued, and incorporated into XI Corps (Potomac).

II Corps Virginia

(Transferred from War Department, September 2 1862 September 12 1862, discontinued, to XII Corps Potomac)

Nathaniel Prentiss Banks (September 2 1862-September 3 1862), Alpheus Starkey Williams (Temporary September 4 1862-September 12 1862)

September 2 1862: II Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. Major-General Nathaniel Prentiss Banks retained command of II Corps (Virginia).

September 4 1862: Brigadier-General Alpheus Starkey Williams assumed temporary command of II Corps (Virginia), succeeding Major-General Nathaniel Prentiss Banks.

September 12 1862: II Corps (Virginia) was discontinued, and incorporated into XII Corps (Potomac).

III Corps Virginia

(Transferred from War Department, September 2 1862-September 12 1862, discontinued, to I Corps Potomac)

Irvin McDowell (September 2 1862-September 4 1862), James Brewerton Ricketts (temporary September 5 1862), Joseph Hooker (September 6 1862-September 12 1862)

September 2 1862: III Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. Major-General Irvin McDowell retained command of I Corps (Virginia).

September 5 1862: Brigadier-General James Brewerton Ricketts assumed temporary command of III Corps (Virginia), succeeding Major-General Irvin McDowell.

September 6 1862: Major-General Joseph Hooker assumed command of III Corps (Virginia), succeeding Brigadier-General James Brewerton Ricketts.

September 12 1862: III Corps (Virginia) was discontinued, and incorporated into I Corps (Potomac).

IX Corps Potomac

(Transferred from Department of Virginia, September 3 1862-November 14 1862, transferred to Right Grand Division Potomac)

Jesse Lee Reno (September 3 1862-September 13 1862) Jacob Dolson Cox (temporary September 14 1862-October 7 1862), Orlando Bolivar Willcox (October 8 1862-November 14 1862)

September 3 1862: IX Corps (Virginia) transferred from the Department of Virginia to the Army of the Potomac. Major-General Jesse Lee Reno assumed command of IX Corps (Potomac), succeeding Major-General Ambrose Everett Burnside.

September 14 1862: Brigadier-General Jacob Dolson Cox assumed temporary command of IX Corps (Potomac), succeeding Major-General Jesse Lee Reno.

October 8 1862: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Potomac), succeeding Major-General Jacob Dolson Cox.

November 14 1862: IX Corps (Potomac) transferred to the Right Grand Division of the Army of the Potomac.

I Corps Potomac

(Established, from III Corps Virginia, September 12 1862-November 14 1862, transferred to Left Grand Division Potomac)

Joseph Hooker (September 12 1862-September 17 1862), George Gordon Meade (temporary September 17 1862-September 28 1862), John Fulton Reynolds (September 29 1862-November 14 1862)

September 12 1862: I Corps (Potomac) was established, comprising the forces of the discontinued III Corps (Army of Virginia). Major-General Joseph Hooker assumed command of I Corps (Potomac).

September 17 1862: Major-General George Gordon Meade assumed temporary command of I Corps (Potomac), succeeding Major-General Joseph Hooker.

September 29 1862: Brigadier-General John Fulton Reynolds assumed command of I Corps (Potomac), succeeding Major-General George Gordon Meade.

November 14 1862: I Corps (Potomac) transferred to the Left Grand Division of the Army of the Potomac.

XI Corps Potomac

(Established, from I Corps Virginia, September 12 1862-November 14 1862, transferred to Reserve Grand Division Potomac)

Franz Sigel (September 12 1862-November 14 1862)

September 12 1862: XI Corps was established in the Army of the Potomac, comprising the forces of the discontinued I Corps (Virginia). Major-General Franz Sigel assumed command of XI Corps (Potomac).

November 14 1862: XI Corps (Potomac) transferred to the Reserve Grand Division of the Army of the Potomac.

XII Corps Potomac

(Established, from II Corps Virginia, September 12 1862-November 14 1862, transferred to Reserve Grand Division Potomac)

Alpheus Starkey Williams (temporary September 12 1862-September 14 1862), Joseph King Fenno Mansfield (September 15 1862-September 17 1862), Alpheus Starkey Williams (temporary September 17 1862-October 19 1862), Henry Warner Slocum (October 20 1862-November 14 1862)

September 12 1862: XII Corps was established in the Army of the Potomac, comprising the forces of the discontinued II Corps (Virginia). Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps (Potomac).

September 15 1862: Major-General Joseph King Fenno Mansfield assumed command of XII Corps (Potomac), succeeding Brigadier-General Alpheus Starkey Williams.

September 17 1862: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps (Potomac), succeeding Major-General Joseph King Fenno Mansfield.

October 20 1862: Major-General Henry Warner Slocum assumed command of XII Corps (Potomac), succeeding Brigadier-General Alpheus Starkey Williams.

November 14 1862: XII Corps (Potomac) transferred to the Reserve Grand Division of the Army of the Potomac.

Right Grand Division Potomac

(Established, November 14 1862-February 5 1863, discontinued)

Edwin Vose Sumner (November 14 1862-January 24 1863), Darius Nash Couch (January 25 1863-February 5 1863)

November 14 1862: The Right Grand Division was established in the Army of the Potomac. Major-General Edwin Vose Sumner assumed command of the Right Grand Division of the Army of the Potomac. II Corps (Potomac) transferred to the Right Grand Division of the Army of the Potomac. IX Corps (Potomac) transferred to the Right Grand Division of the Army of the Potomac.

January 25 1863: Major-General Darius Nash Couch assumed command of the Right Grand Division of the Army of the Potomac, succeeding Major-General Edward Vose Sumner.

February 5 1863: The Right Grand Division of the Army of the Potomac was discontinued. II Corps (Potomac) transferred to the Army of the Potomac. IX Corps Potomac transferred to the Department of Virginia.

II Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, Transferred to Army of the Potomac)

Darius Nash Couch (November 14 1862-December 25 1862), John Sedgwick (December 26 1862-January 25 1863), Oliver Otis Howard (temporary January 26 1863-February 2 1863), Darius Nash Couch (February 3 1863-February 5 1863)

November 14 1862: II Corps (Potomac) transferred to the Right Grand Division of the Army of the Potomac. Major-General Darius Nash Couch retained command of II Corps (Potomac).

December 26 1862: Major-General John Sedgwick assumed command of II Corps (Potomac), succeeding Major-General Darius Nash Couch.

January 26 1863: Major-General Oliver Otis Howard assumed temporary command of II Corps (Potomac), succeeding Major-General John Sedgwick.

February 3 1863: Major-General Darius Nash Couch assumed command of II Corps (Potomac), succeeding Major-General Oliver Otis Howard.

February 5 1863: The Right Grand Division of the Army of the Potomac was discontinued. II Corps (Potomac) transferred to the Army of the Potomac.

IX Corps Potomac

(Transferred from Army of the Potomac November 14 1862-February 5 1863, transferred to Department of Virginia)

Orlando Bolivar Willcox (November 14 1862-January 15 1863), John Sedgwick (January 16 1863-February 5 1863)

November 14 1862: IX Corps (Potomac) transferred to the Right Grand Division of the Army of the Potomac. Brigadier-General Orlando Bolivar Willcox retained command of IX Corps (Potomac).

January 16 1863: Major-General John Sedgwick assumed command of IX Corps (Potomac), succeeding Brigadier-General Orlando Bolivar Willcox.

February 5 1863: The Right Grand Division of the Army of the Potomac was discontinued. IX Corps Potomac transferred to the Department of Virginia.

Left Grand Division Potomac

(Established, November 14 1862-February 5 1863, discontinued)

William Buel Franklin (November 14 1862-January 24 1863), William Farrar Smith (January 25 1863-February 5 1863)

November 14 1862: The Left Grand Division was established in the Army of the Potomac. Major-General William Buel Franklin assumed command of the Left Grand Division of the Army of the Potomac. I Corps (Potomac) transferred to the Left Grand Division of the Army of the Potomac. VI Corps (Potomac) transferred to the Left Grand Division of the Army of the Potomac.

January 25 1863: Major-General William Farrar Smith assumed command of the Left Grand Division of the Army of the Potomac, succeeding Major-General William Buel Franklin.

February 5 1863: The Left Grand Division of the Army of the Potomac was discontinued. I Corps (Potomac) transferred to the Army of the Potomac. VI Corps Potomac transferred to the Army of the Potomac.

I Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, transferred to Army of the Potomac)

John Fulton Reynolds (November 14 1862-January 1 1863), James Samuel Wadsworth (temporary January 2 1863-January 3 1863), John Fulton Reynolds (January 4 1863-February 5 1863)

November 14 1862: I Corps (Potomac) transferred to the Left Grand Division of the Army of the Potomac. Major-General John Fulton Reynolds retained command of I Corps (Potomac).

January 2 1863: Brigadier-General James Samuel Wadsworth assumed temporary command of I Corps (Potomac), succeeding Major-General John Fulton Reynolds.

January 4 1863: Major-General John Fulton Reynolds assumed command of I Corps (Potomac), succeeding Brigadier-General James Samuel Wadsworth.

February 5 1863: The Left Grand Division of the Army of the Potomac was discontinued. I Corps (Potomac) transferred to the Army of the Potomac.

VI Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, transferred to Army of the Potomac)

William Buel Franklin (November 14 1862-November 15 1862), William Farrar Smith (November 16 1862-January 24 1863), John Newton (January 2 1863-February 3 1863), John Sedgwick (February 4 1864-February 5 1863)

November 14 1862: VI Corps (Potomac) transferred to the Left Grand Division of the Army of the Potomac. Major-General William Buel Franklin retained command of VI Corps (Potomac).

November 16 1862: Major-General William Farrar Smith assumed command of VI Corps (Potomac), succeeding Major-nd Division of the Army of the Potomac was discontinued. VI Corps Potomac transferred to the Army of the Potomac.

Centre Grand Division Potomac

(Established, November 14 1862-February 5 1863, discontinued)

Joseph Hooker (November 14 1862-January 24 1863), George Gordon Meade (January 25 1863)

November 14 1862: The Centre Grand Division was established in the Army of the Potomac. Major-General Joseph Hooker assumed command of the Centre Grand Division of the Army of the Potomac. III Corps (Potomac) transferred to the Centre Grand Division of the Army of the Potomac. V Corps (Potomac) transferred to the Centre Grand Division of the Army of the Potomac.

January 25 1863: Major-General George Gordon Meade assumed command of the Centre Grand Division of the Army of the Potomac, succeeding Major-General Joseph Hooker.

February 5 1863: The Centre Grand Division of the Army of the Potomac was discontinued. III Corps (Potomac) transferred to the Army of the Potomac. V Corps Potomac transferred to the Army of the Potomac.

III Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, transferred to Army of the Potomac)

George Stoneman (November 14 1862-February 5 1863)

November 14 1862: III Corps (Potomac) transferred to the Centre Grand Division of the Army of the Potomac. Major-General George Stoneman retained command of III Corps (Potomac).

February 5 1863: The Centre Grand Division of the Army of the Potomac was discontinued. III Corps (Potomac) transferred to the Army of the Potomac.

V Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, transferred to Army of the Potomac)

Joseph Hooker (November 14 1862-November 15 1862) Daniel Butterfield (November 16 1862-December 23 1862), George Gordon Meade (December 24 1862-January 25 1863), Charles Griffin temporary January 26 1863-January 31 1863), George Sykes (February 1 1863-February 5 1863)

November 14 1862: V Corps (Potomac) transferred to the Centre Grand Division of the Army of the Potomac. Major-General Joseph Hooker retained command of V Corps (Potomac).

November 16 1862: Brigadier-General Daniel Butterfield assumed command of V Corps (Potomac), succeeding Major-General Joseph Hooker.

December 24 1862: Major-General George Gordon Meade assumed command of V Corps (Potomac), succeeding Major-General Daniel Butterfield.

January 26 1863: Brigadier-General Charles Griffin assumed temporary command of V Corps (Potomac), succeeding Major-General George Gordon Meade.

February 1 1863: Major-General George Sykes assumed temporary command of V Corps (Army of the Potomac), succeeding Brigadier-General Charles Griffin.

February 5 1863: The Centre Grand Division of the Army of the Potomac was discontinued. V Corps Potomac transferred to the Army of the Potomac.

Reserve Grand Division Potomac

(Established, November 14 1862-February 5 1863, discontinued)

Franz Sigel (November 14 1862-February 5 1863)

November 14 1862: The Reserve Grand Division was established in the Army of the Potomac. Major-General Franz Sigel assumed command of the Reserve Grand Division of the Army of the Potomac. XI Corps (Potomac) transferred to the Reserve Grand Division of the Army of the Potomac. XII Corps (Potomac) transferred to the Reserve Grand Division of the Army of the Potomac.

February 5 1863: The Reserve Grand Division of the Army of the Potomac was discontinued. XI Corps (Potomac) transferred to the Army of the Potomac. XII Corps Potomac transferred to the Army of the Potomac.

XI Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, transferred to Army of the Potomac)

Franz Sigel (November 14 1862-January 9 1863), Julius Stahel (temporary January 10 1863-January 18 1863), Carl Schurz (temporary January 19 1863-February 5 1863)

November 14 1862: XI Corps (Potomac) transferred to the Reserve Grand Division of the Army of the Potomac. Major-General Franz Sigel retained command of XI Corps (Potomac).

January 10 1863: Brigadier-General Julius Stahel assumed temporary command of XI Corps (Potomac), succeeding Major-General Franz Sigel.

January 19 1863: Major-General Carl Schurz assumed temporary command of XI Corps (Potomac), succeeding Brigadier-General Julius Stahel

February 5 1863: The Reserve Grand Division of the Army of the Potomac was discontinued. XI Corps (Potomac) transferred to the Army of the Potomac.

XII Corps Potomac

(Transferred from Army of the Potomac, November 14 1862-February 5 1863, transferred to Army of the Potomac)

Henry Warner Slocum (November 14 1862-February 5 1863)

November 14 1862: XII Corps (Potomac) transferred to the Reserve Grand Division of the Army of the Potomac. Major-General Henry Warner Slocum retained command of XIII Corps (Potomac).

February 5 1863: The Reserve Grand Division of the Army of the Potomac was discontinued. XII Corps Potomac transferred to the Army of the Potomac.

I Corps Potomac

(Transferred from Left Grand Division, February 5 1863-March 24 1864, discontinued, to V Corps (Potomac))

John Fulton Reynolds February 5 1863-February 28 1863), James Samuel Wadsworth (temporary March 1 1863-March 8 1863), John Fulton Reynolds (March 9 1863-July 1 1863), Abner Doubleday (July 1 1863-July 2 1863), John Newton (July 2 1863-March 10 1864), James Samuel Wadsworth (temporary March 11 1864-March 14 1864), John Newton (March 14 186-March 24 1864)

February 5 1863: I Corps (Potomac) transferred from the Left Grand Division (Potomac) to the Army of the Potomac. Major-General John Fulton Reynolds retained command of I Corps (Potomac).

March 1 1863: Brigadier-General James Samuel Wadsworth assumed temporary command of I Corps (Potomac), succeeding Major-General John Fulton Reynolds.

March 9 1863: Major-General John Fulton Reynolds assumed command of I Corps (Potomac), succeeding Brigadier-General James Samuel Wadsworth.

July 1 1863: Major-General Abner Doubleday assumed temporary command of I Corps (Potomac), succeeding Major-General John Fulton Reynolds.

July 2 1863: Major-General John Newton assumed command of I Corps (Potomac), succeeding Major-General Abner Doubleday.

March 11 1864: Brigadier-General James Samuel Wadsworth assumed temporary command of I Corps (Potomac), succeeding Brigadier-General John Newton.

March 14 1864: Major-General John Newton assumed command of I Corps (Potomac), succeeding Brigadier-General James Samuel Wadsworth.

March 24 1864: I Corps (Potomac) was discontinued, and its forces allocated to V Corps (Potomac).

II Corps Potomac

(Transferred from Right Grand Division, February 5 1863-April 19 1865, transferred to Military Division of the James)

Darius Nash Couch (February 5 1863-May 22 1863), Winfield Scott Hancock (May 22 1863-July 1 1863), John Gibbon (temporary July 1 1863-July 2 1863), Winfield Scott Hancock (July 2 1863-July 3 1863), William Hays (temporary July 3 1863-August 16 1863), Gouverneur Kemble Warren (August 16 1863-August 26 1863), John Curtis Caldwell (temporary August 26 1863-September 2 1863)), Gouverneur Kemble Warren (September 2 1863-October 10 1863), John Curtis Caldwell (temporary October 10 1863-October 12 1863)), Gouverneur Kemble Warren (October 12 1863-December 16 1863), John Curtis Caldwell (temporary December 16 1863-December 29 1863), Gouverneur Kemble Warren (December 29 1863-January 9 1864), John Curtis Caldwell (temporary January 9 1864-January 13 1864), Gouverneur Kemble Warren (January 13 1864-March 24 1864), Winfield Scott Hancock (March 24 1864-June 18 1864), David Bell Birney (temporary June 18 1864-June 27 1864), Winfield Scott Hancock (June 27 1864-November 26 1864), Andrew Atkinson Humphreys (November 26 1864-February 15 1865), Gershom Mott (temporary February 15 1865-February 17 1865), Nelson Appleton Miles (temporary February 17 1865-February 25 1865), Andrew Atkinson Humphreys (February 25 1865-April 19 1865), Francis Channing Barlow (temporary April 19 1865-April 19 1865)

February 5 1863: The Right Grand Division of the Army of the Potomac was discontinued. II Corps (Potomac) transferred to the Army of the Potomac. Major-General Darius Nash Couch retained command of II Corps (Potomac).

May 22 1863: Major-General Winfield Scott Hancock assumed command of II Corps (Potomac), succeeding Major-General Darius Nash Couch.

July 1 1863: Brigadier-General John Gibbon assumed temporary command of II Corps (Potomac), succeeding Major-General Winfield Scott Hancock.

July 2 1863: Major-General Winfield Scott Hancock assumed command of II Corps (Potomac), succeeding Brigadier-General John Gibbon.

July 3 1863: Brigadier-General William Hays assumed temporary command of II Corps (Potomac), succeeding Major-General Winfield Scott Hancock.

August 16 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps (Potomac), succeeding Brigadier-General William Hays.

August 26 1863: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

September 2 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps (Potomac), succeeding Brigadier-General John Curtis Caldwell.

October 10 1863: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

October 12 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps (Potomac), succeeding Brigadier-General John Curtis Caldwell.

December 16 1863: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

December 29 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps (Potomac), succeeding Brigadier-General John Curtis Caldwell.

January 9 1864: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

January 13 1864: Major-General Gouverneur Kemble Warren assumed command of II Corps (Potomac), succeeding Brigadier-General John Curtis Caldwell.

March 24 1864: III Corps (Potomac) was discontinued, and its forces allocated to II Corps (Potomac) and VI Corps (Potomac). Major-General Winfield Scott Hancock assumed command of II Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

June 18 1864: Brigadier-General David Bell Birney assumed temporary command of II Corps (Potomac), succeeding Major-General Winfield Scott Hancock.

June 27 1864: Major-General Winfield Scott Hancock assumed command of II Corps (Potomac), succeeding Major-General David Bell Birney.

November 26 1864: Major-General Andrew Atkinson Humphreys assumed command of II Corps (Potomac), succeeding Major-General Winfield Scott Hancock.

February 15 1865: Major-General Gershom Mott assumed temporary command of II Corps (Potomac), succeeding Brigadier-General Andrew Atkinson Humphreys.

February 17 1865: Brigadier-General Nelson Appleton Miles assumed temporary command of II Corps (Potomac), succeeding Brigadier-General Gershom Mott.

February 25 1865: Major-General Andrew Atkinson Humphreys assumed command of II Corps (Potomac), succeeding Brigadier-General Nelson Appleton Miles.

April 19 1865: Brigadier-General Francis Channing Barlow assumed temporary command of II Corps (Potomac), succeeding Major-General Andrew Atkinson Humphreys.

April 19 1865: II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James.

III Corps Potomac

(Transferred from Centre Grand Division, February 5 1863-March 24 1864, discontinued, to II Corps (Potomac) and VI Corps (Potomac)

Daniel Edgar Sickles (February 5 1863-May 29 1863), David Bell Birney (temporary May 29 1863-June 3 1863), Daniel Edgar Sickles (June 3 1863-July 2 1863), David Bell Birney (temporary July 2 1863-July 7 1863), William Henry French (July 7 1863-January 28 1864), David Bell Birney (temporary January 28 1864-February 17 1864), William Henry French (February 17 1864-March 24 1864)

February 5 1863: III Corps (Potomac) transferred from the Centre Grand Division (Potomac) to the Army of the Potomac. Major-General Daniel Edgar Sickles assumed command of III Corps (Potomac).

May 29 1863: Major-General David Bell Birney assumed temporary command of III Corps (Potomac), succeeding Major-General Daniel Edgar Sickles.

June 3 1863: Major-General Daniel Edgar Sickles assumed command of III Corps (Potomac), succeeding Major-General David Bell Birney.

July 2 1863: Brigadier-General David Bell Birney assumed temporary command of III Corps (Potomac), succeeding Major-General Daniel Edgar Sickles.

July 7 1863: Major-General William Henry French assumed command of III Corps (Potomac), succeeding Major-General David Bell Birney.

January 28 1864: Brigadier-General David Bell Birney assumed temporary command of III Corps (Potomac), succeeding Major-General William Henry French.

February 17 1864: Major-General William Henry French assumed command of III Corps (Potomac), succeeding Major-General David Bell Birney.

March 24 1864: III Corps (Potomac) was discontinued, and its forces allocated to II Corps (Potomac) and VI Corps (Potomac).

V Corps Potomac

(Transferred from Centre Grand Division, February 5 1863-April 19 1865, transferred to Military Division of the James)

George Gordon Meade (February 5 1863-February 16 1863), George Sykes (temporary February 16 1863-February 23 1863), Andrew Atkinson Humphreys (temporary February 23 1863-February 28 1863), George Gordon Meade (February 28 1863-June 28 1863), George Sykes (June 28 1863-October 7 1863), Samuel Wylie Crawford (temporary October 7 1863-October 15 1863), George Sykes (October 15 1863-March 24 1864), Gouverneur Kemble Warren (March 24 1864-January 2 1865), Samuel Wylie Crawford (temporary January 2 1865-January 27 1865), Gouverneur Kemble Warren (January 27 1865-April 1 1865), Charles Griffin (temporary April 1 1865-April 19 1865)

February 5 1863: V Corps Potomac transferred from the Centre Grand Division (Potomac) to the Army of the Potomac. Major-General George Gordon Meade assumed command of V Corps (Potomac), succeeding Major-General George Sykes.

February 16 1863: Major-General George Sykes assumed temporary command of V Corps (Potomac), succeeding Major-General George Gordon Meade

February 23 1863: Brigadier-General Andrew Atkinson Humphreys assumed temporary command of V Corps (Potomac), succeeding Major-General George Sykes.

February 28 1863: Major-General George Gordon Meade assumed command of V Corps (Potomac), succeeding Brigadier-General Andrew Atkinson Humphreys.

June 28 1863: Major-General George Sykes assumed command of V Corps (Potomac), succeeding Major-General George Gordon Meade.

October 7 1863: Brigadier-General Samuel Wylie Crawford assumed temporary command of V Corps (Potomac), succeeding Major-General George Sykes.

October 15 1863: Major-General George Sykes assumed command of V Corps (Potomac), succeeding Brigadier-General Samuel Wylie Crawford.

March 24 1864: I Corps (Potomac) was discontinued, and its forces allocated to V Corps (Potomac). Major-General Gouverneur Kemble Warren assumed command of V Corps (Potomac), succeeding Major-General George Sykes.

January 2 1865: Brigadier-General Samuel Wylie Crawford assumed temporary command of V Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

January 27 1865: Major-General Gouverneur Kemble Warren assumed command of V Corps (Potomac), succeeding Brigadier-General Samuel Wylie Crawford.

April 1 1865: Brigadier-General Charles Griffin assumed command of V Corps (Potomac), succeeding Major-General Gouverneur Kemble Warren.

April 19 1865: V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James.

VI Corps Potomac

(Transferred from Left Grand Division, February 5 1863-August 7 1864, transferred to Army of the Shenandoah)

John Sedgwick (February 5 1863-April 6 1864), James Brewerton Ricketts (temporary April 6 1864-April 13 1864), John Sedgwick (April 13 1864-May 9 1864), Horatio Gouverneur Wright (May 9 1864-August 7 1864)

February 5 1863: VI Corps Potomac transferred from Left Grand Division Potomac to the Army of the Potomac. Major-General John Sedgwick retained command of VI Corps (Potomac).

March 24 1864: III Corps (Potomac) was discontinued, and its forces allocated to II Corps (Potomac) and VI Corps (Potomac).

April 6 1864: Brigadier-General James Brewerton Ricketts assumed temporary command of VI Corps (Potomac), succeeding Major-General John Sedgwick.

April 13 1864: Major-General John Sedgwick assumed command of VI Corps (Potomac), succeeding Brigadier-General James Brewerton Ricketts.

May 9 1864: Brigadier-General Horatio Gouverneur Wright assumed command of VI Corps (Potomac), succeeding Major-General John Sedgwick.

August 7 1864: VI Corps (Potomac) transferred from the Army of the Potomac to the Army of the Shenandoah.

XI Corps Potomac

(Transferred from Reserve Grand Division, February 5 1863-September 25 1863, transferred to Hooker’s Command Cumberland)

Franz Sigel (February 5 1863-February 22 1863), Adolph Wilhelm August Frederick von Steinwehr (temporary February 22 1863-March 5 1863), Carl Schurz (temporary March 5 1863-April 2 1863), Oliver Otis Howard (April 2 1863-July 1 1863), Carl Schurz (temporary July 1 1863), Oliver Otis Howard (July 1 1863-September 25 1863)

February 5 1863: XI Corps (Potomac) transferred from the Reserve Grand Division (Potomac) to the Army of the Potomac. Major-General Franz Sigel assumed command of XI Corps (Potomac), succeeding Major-General Carl Schurz.

February 22 1863: Brigadier-General Adolph Wilhelm August Frederick von Steinwehr assumed temporary command of XI Corps (Potomac), succeeding Major-General Franz Sigel.

March 5 1863: Brigadier-General Carl Schurz assumed temporary command of XI Corps (Potomac), succeeding Brigadier-General Adolph Wilhelm August Frederick von Steinwehr.

April 2 1863: Major-General Oliver Otis Howard assumed command of XI Corps (Potomac), succeeding Major-General Carl Schurz.

July 1 1863: Brigadier-General Carl Schurz assumed temporary command of XI Corps (Potomac), succeeding Major-General Oliver Otis Howard. Major-General Oliver Otis Howard assumed command of XI Corps (Potomac), succeeding Major-General Carl Schurz.

September 25 1863: XI Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland).

XII Corps Potomac

(Transferred from Reserve Grand Division, February 5 1863-September 25 1863, transferred to Hooker’s Command Cumberland)

Henry Warner Slocum (February 5 1863-July 1 1863), Alpheus Starkey Williams (temporary July 1 1863-July 4 1863), Henry Warner Slocum (July 4 1863-August 31 1863), Alpheus Starkey Williams (temporary August 31 1863-September 13 1863), Henry Warner Slocum (September 13 1863-September 25 1863)

February 5 1863: The Reserve Grand Division of the Army of the Potomac was discontinued. XII Corps Potomac transferred to the Army of the Potomac. Major-General Henry Warner Slocum retained command of XII Corps (Potomac).

July 1 1863: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps (Potomac), succeeding Major-General Henry Warner Slocum.

July 4 1863: Major-General Henry Warner Slocum assumed command of XII Corps (Potomac), succeeding Brigadier-General Alpheus Starkey Williams.

August 31 1863: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps (Potomac), succeeding Major-General Henry Warner Slocum.

September 13 1863: Major-General Henry Warner Slocum assumed command of XII Corps (Potomac), succeeding Brigadier-General Alpheus Starkey Williams.

September 25 1863: XII Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland).

Cavalry Corps Potomac

(Established, February 12 1863-March 26 1865, transferred to Sheridan’s Cavalry Command)

George Stoneman (February 12 1863-May 22 1863), Alfred Pleasonton (May 22 1863-January 22 1864), David McMurtrie Gregg (temporary January 22 1864-February 12 1864), Alfred Pleasonton (February 12 1864-March 25 1864), David McMurtrie Gregg (temporary March 25 1864-April 4 1864), Philip Henry Sheridan (April 4 1864-August 2 1864), David McMurtrie Gregg (August 2 1864-February 10 1865), John Irvin Gregg (temporary February 10 1865-February 24 1865), Henry Eugene Davies (February 24 1865-March 25 1865), Wesley Merritt (March 25 1865-March 26 1865)

February 12 1863: Cavalry Corps (Potomac) was established in the Army of the Potomac. Major-General George Stoneman assumed command of Cavalry Corps (Potomac).

May 22 1863: Brigadier-General Alfred Pleasonton assumed command of Cavalry Corps (Potomac), succeeding Major-General George Stoneman.

January 22 1864: Brigadier-General David McMurtrie Gregg assumed command of Cavalry Corps (Potomac), succeeding Major-General Alfred Pleasonton.

February 12 1864: Major-General Alfred Pleasonton assumed command of Cavalry Corps (Potomac), succeeding Brigadier-General David McMurtrie Gregg.

March 25 1864: Brigadier-General David McMurtrie Gregg assumed temporary command of Cavalry Corps (Potomac), succeeding Major-General Alfred Pleasonton.

April 4 1864: Major-General Philip Henry Sheridan assumed command of Cavalry Corps (Potomac), succeeding Brigadier-General David McMurtrie Gregg.

August 2 1864: Brigadier-General David McMurtrie Gregg assumed command of Cavalry Corps (Potomac), succeeding Major-General Philip Henry Sheridan.

February 10 1865: Colonel John Irvin Gregg assumed command of Cavalry Corps (Potomac), succeeding Major-General David McMurtrie Gregg.

February 24 1865: Brigadier-General Henry Eugene Davies assumed command of Cavalry Corps (Potomac), succeeding Colonel John Irvin Gregg.

March 25 1865: Brigadier-General Wesley Merritt assumed command of Cavalry Corps (Potomac), succeeding Brigadier-General Henry Eugene Davies.

March 26 1865: Cavalry Corps (Potomac) transferred from the Army of the Potomac to Sheridan’s Cavalry Command (Potomac).

IX Corps Potomac

(Transferred from Army of the Ohio, April 13 1864-May 24 1864, transferred to Department of the Potomac)

Ambrose Everett Burnside (April 13 1864-May 24 1864)

April 13 1864: IX Corps transferred from the Army of the Ohio to the Department of the Potomac. Major-General Ambrose Everett Burnside assumed command of IX Corps (Potomac), succeeding Major-General John Grubb Parke.

May 24 1864: IX Corps was officially transferred from the Department of the Potomac to the Army of the Potomac.

IX Corps Potomac

(Transferred from Department of the Potomac, May 24 1864-April 19 1865, transferred to Military Division of the James)

Ambrose Everett Burnside (May 24 1864-August 14 1864), John Grubb Parke (temporary August 14 1864-August 22 1864, August 22 1864-September 1 1864), Orlando Bolivar Willcox (temporary September 1 1864-September 9 1864), John Grubb Parke (September 9 1864-December 31 1864), Orlando Bolivar Willcox (temporary December 31 1864-January 12 1865), John Grubb Parke (January 12 1865-January 24 1865), Orlando Bolivar Willcox (temporary January 24 1865-February 2 1865), John Grubb Parke (February 2 1865-April 19 1865)

May 24 1864: IX Corps was officially transferred from the Department of the Potomac to the Army of the Potomac. Major-General Ambrose Everett Burnside retained command of IX Corps (Potomac).

August 14 1864: Major-General John Grubb Parke assumed temporary command of IX Corps (Potomac), succeeding Major-General Ambrose Everett Burnside.

August 22 1864: Major-General John Grubb Parke assumed full command of IX Corps (Potomac).

September 1 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Potomac), succeeding Major-General John Grubb Parke.

September 9 1864: Major-General John Grubb Parke assumed command of IX Corps (Potomac), succeeding Brigadier-General Orlando Bolivar Willcox.

December 31 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Potomac), succeeding Major-General John Grubb Parke.

January 12 1865: Major-General John Grubb Parke assumed command of IX Corps (Potomac), succeeding Brigadier-General Orlando Bolivar Willcox.

January 24 1865: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Potomac), succeeding Major-General John Grubb Parke.

February 2 1865: Major-General John Grubb Parke assumed command of IX Corps (Potomac), succeeding Brigadier-General Orlando Bolivar Willcox.

April 19 1865: IX Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James.

VI Corps Potomac

(Transferred from Army of the Shenandoah, December 6 1864-April 19 1865, transferred to Military Division of the James)

Horatio Gouverneur Wright (December 6 1864-January 16 1865), George Washington Getty (temporary January 16 1865-February 11 1865), Horatio Gouverneur Wright (February 11 1865-April 19 1865)

December 6 1864: VI Corps (Shenandoah) transferred from the Army of the Shenandoah to the Army of the Potomac. Major-General Horatio Gouverneur Wright retained command of VI Corps (Potomac).

January 16 1865: Brigadier-General George Washington Getty assumed temporary command of VI Corps (Potomac), succeeding Major-General Horatio Gouverneur Wright.

February 11 1865: Major-General Horatio Gouverneur Wright assumed command of VI Corps (Potomac), succeeding Brigadier-General George Washington Getty.

April 19 1865: VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James.

Sheridan’s Cavalry Command Potomac

(Established, from Cavalry Corps Shenandoah, March 26 1865-April 19 1865, transferred to Military Division of the James)

Philip Henry Sheridan (March 26 1865-April 19 1865)

March 26 1865: Sheridan’s Cavalry Command was established in the Department of the Potomac. It comprised the combined cavalry forces of the Army of the Potomac, the Army of the James and the Army of the Shenandoah. Major-General Philip Henry Sheridan assumed command of Sheridan’s Cavalry Command (Potomac). Cavalry Corps (Potomac) transferred from the Army of the Potomac to Sheridan’s Cavalry Command (Potomac).

April 19 1865: Sheridan’s Cavalry Command (Potomac) transferred with the Department of the Potomac to the Military Division of the James.

Cavalry Corps Potomac

(Transferred from Army of the Potomac, March 26 1865-April 19 1865, transferred to Military Division of the James)

Wesley Merritt (March 26 1865-April 19 1865)

March 26 1865: Cavalry Corps (Potomac) transferred from the Army of the Potomac to Sheridan’s Cavalry Command (Potomac). Brigadier-General Wesley Merritt retained command of Cavalry Corps Potomac.

April 19 1865: Cavalry Corps (Potomac) transferred with Sheridan’s Cavalry Command (Potomac) to the Military Division of the James.

Department of Western Virginia

(Established, September 19 1861-March 11 1862, transferred to Mountain Department)

William Starke Rosecrans (September 19 1861-March 11 1862)

September 19 1861: The Department of Western Virginia was established, comprising Virginia west of the Blue Ridge Mountains. Its territory was taken from the Department of the East and the Department of the Ohio but not until 9th November 1861 from the Department of the Potomac. Brigadier-General William Starke Rosecrans was appointed to command the Department of Western Virginia, arriving on 11th October 1861.

October 11 1861: The District of the Kanawha was established in the Department of Western Virginia.

October 11 1861: Brigadier-General William Starke Rosecrans arrived to command the Department of Western Virginia.

November 9 1861: The territory of Virginia west of the Blue Ridge Mountains transferred to the Department of Western Virginia from the Department of the Potomac.

December 19 1861: The Cheat Mountain District was established in the Department of Western Virginia, comprising the vicinity of Beverly, Elkwater and Huttonsville.

December 20 1861: The Railroad District was established in the Department of Western Virginia, comprising the territory of the former District of Grafton in the Department of the Ohio and all railroads in western Virginia.

March 3 1862: The territory west of Flintstone Creek, Maryland, South Branch Mountain, North Shenandoah Mountain, Purgatory Mountain, Blue Ridge Mountain and Allegheny Mountain were transferred from the Department of the Potomac to the Department of Western Virginia.

March 11 1862: The Department of Western Virginia was discontinued. Its territory transferred to the Mountain Department.

District of the Kanawha

(Established, October 11 1861-March 11 1862, transferred to Mountain Department)

Jacob Dolson Cox (October 11 1861-March 11 1862)

October 11 1861: The District of the Kanawha was established in the Department of Western Virginia, comprising Point Pleasant, Buffalo, Charleston, Gauley Bridge, Summerville and Fayetteville. Brigadier-General Jacob Dolson Cox assumed command of the District of the Kanawha.

March 11 1862: The District of the Kanawha transferred from the Department of Western Virginia to the Mountain Department, comprising the valleys of the Kanawha, New and Guyandotte Rivers and the mouth of the Big Sandy River.

Cheat Mountain District

(Established, December 19 1861-March 11 1862, transferred to Mountain Department)

Robert Huston Milroy (December 19 1861-March 11 1862)

December 19 1861: The Cheat Mountain District was established in the Department of Western Virginia, comprising the vicinity of Beverly, Elkwater and Huttonsville. Brigadier-General Robert Huston Milroy assumed command of the Cheat Mountain District.

March 11 1862: The Cheat Mountain District transferred from the Department of Western Virginia to the Mountain Department, comprising all the territory west of the Allegheny Mountains south of the Baltimore & Ohio Railroad, east of the Summerville-Weston Road and north of the Gauley River.

Railroad District

(Established, from District of Grafton, December 20 1861-March 11 1862, transferred to Mountain Department)

Benjamin Franklin Kelley (December 20 1861-March 11 1862)

December 20 1861: The Railroad District was established in the Department of Western Virginia, comprising the territory of the former District of Grafton in the Department of the Ohio and all railroads in western Virginia. Brigadier-General Benjamin Franklin Kelley assumed command of the Railroad District.

March 11 1862: The Railroad District transferred from the Department of Western Virginia to the Mountain Department.

Mountain Department

(Established, from Department of Western Virginia, March 11 1862-June 26 1862, discontinued, to I Corps Virginia)

William Starke Rosecrans (Interim March 11 1862-March 29 1862), John Charles Frémont (March 11 1862-June 26 1862)

March 11 1862: The Mountain Department was established. Its territory included the parts of Michigan, Ohio, Kentucky and Tennessee west of a line running north-south through Knoxville, Tennessee; all of Maryland and Virginia west of the line from Flintstone Creek, Maryland, to South Branch Mountain, Town Hill Mountain, Branch Mountain (Big Ridge), North Shenandoah Mountain, Purgatory Mountain, Blue Ridge Mountain and Allegheny Mountain to the border of North Carolina. This territory was taken from the Department of the Ohio and the Department of Western Virginia. Major-General John Charles Frémont was appointed to command the Mountain Department, arriving on 29th March 1862. Brigadier-General William Starke Rosecrans retained interim command of the Mountain Department pending the arrival of Major-General John Charles Frémont. The Department of Western Virginia was discontinued, and it territory transferred to the Mountain Department. The Railroad District transferred from the Department of Western Virginia to the Mountain Department. The Cheat Mountain District transferred from the Department of Western Virginia to the Mountain Department. The District of the Kanawha transferred from the Department of Western Virginia to the Mountain Department. The District of the Cumberland was established in the Mountain Department. The District of the Gap was established in the Mountain Department. The District of the Valley of the Big Sandy River was established in the Mountain Department.

March 29 1862: Major-General John Charles Frémont arrived to command the Mountain Department, succeeding interim commander Major-General William Starke Rosecrans.

April 7 1862: The District of the Cumberland was discontinued.

June 8 1862: The territories of Eastern Kentucky and eastern Tennessee were transferred from the Mountain Department to the Department (Military Division) of the Mississippi. The parts of Virginia west of the road running from Williamsport to Martinsburg, Winchester, Strasburg, Harrisonville, Staunton and then south to the Blue Ridge Mountains were transferred from the Department of the Shenandoah to the Mountain Department. The District of the Valley of the Big Sandy River was discontinued.

June 26 1862: The Mountain Department was discontinued. The District of the Gap was discontinued. The District of the Kanawha was discontinued. The Cheat Mountain District was discontinued. The Railroad District was discontinued. I Corps (Virginia) was established to include the field forces formerly in the Mountain Department.

Railroad District

(Transferred, from Department of Western Virginia, March 11 1862-June 26 1862, discontinued)

Benjamin Franklin Kelley (March 11 1862-June 26 1862)

March 11 1862: The Railroad District transferred from the Department of Western Virginia to the Mountain Department, comprising the lines of the Baltimore & Ohio Railroad in Virginia west of the Allegheny Mountains and was extended to include the vicinity of Grafton, Clarksburg, Parkersburg and Wheeling, in western Virginia. Brigadier-General Benjamin Franklin Kelley retained command of the Railroad District.

June 26 1862: The Railroad District was discontinued.

Cheat Mountain District

(Transferred from Department of Western Virginia, March 11 1862-June 26 1862, discontinued)

Robert Huston Milroy (March 11 1862-April 12 1862), Thomas Maley Harris (April 12 1862-June 26 1862)

March 11 1862: The Cheat Mountain District transferred from the Department of Western Virginia to the Mountain Department, comprising all the territory west of the Allegheny Mountains south of the Baltimore & Ohio Railroad, east of the Summerville-Weston Road and north of the Gauley River. Brigadier-General Robert Huston Milroy retained command of the Cheat Mountain District.

April 12 1862: Lieutenant-Colonel Thomas Maley Harris assumed command of the Cheat Mountain District, succeeding Brigadier-General Robert Huston Milroy.

June 26 1862: The Cheat Mountain District was discontinued.

District of the Kanawha

(Transferred from Department of Western Virginia, March 11 1862-June 26 1862, discontinued)

Jacob Dolson Cox (March 11 1862-June 26 1862)

March 11 1862: The District of the Kanawha transferred from the Department of Western Virginia to the Mountain Department, comprising the valleys of the Kanawha, New and Guyandotte Rivers and the mouth of the Big Sandy River. Brigadier-General Jacob Dolson Cox retained command of the District of the Kanawha.

June 26 1862: The District of the Kanawha was discontinued.

District of the Cumberland

(Established, March 11 1862-April 7 1862, discontinued)

Robert Cumming Schenck (March 11 1862-April 7 1862)

March 11 1862: The District of the Cumberland was established in the Mountain Department, comprising the territory east of the Allegheny Mountains controlled by the Mountain Department. Brigadier-General Robert Cumming Schenck assumed command of the District of the Cumberland.

April 7 1862: The District of the Cumberland in the Mountain Department was discontinued.

District of the Gap

(Established, March 11 1862-June 26 1862, discontinued)

Samuel Powhatan Carter (March 11 1862-June 26 1862)

March 11 1862: The District of the Gap was established in the Mountain Department. It consisted of the territory west of the valley of the Big Sandy River within the Mountain Department. It was controlled operationally by the Army of the Ohio. Lieutenant USN Samuel Powhatan Carter assumed command of the District of the Gap.

June 26 1862: The District of the Gap was discontinued.

District of the Valley of the Big Sandy River

(Established, March 11 1862-June 8 1862, discontinued)

James Abram Garfield (March 11 1862-June 8 1862)

March 11 1862: The District of the Valley of the Big Sandy River was established in the Mountain Department. Brigadier-General James Abram Garfield assumed command of the District of the Valley of the Big Sandy River.

June 8 1862: The District of the Valley of the Big Sandy River was discontinued.

Military District Washington

(Established, March 12 1862-April 4 1862, transferred to Department of the Rappahannock)

James Samuel Wadsworth (March 12 1862-April 4 1862)

March 12 1862: The Military District of Washington was established as an independent command under the War Department, comprising the District of Columbia, Alexandria in Virginia and Port Washington. Brigadier-General James Samuel Wadsworth assumed command of the Military District of Washington.

April 4 1862: The Military District of Washington transferred to the Department of the Rappahannock.

Middle Department

(Established, March 22 1862-August 7 1864, transferred to Middle Military Division)

John Adams Dix (March 22 1862-June 1 1862 interim June 9 1862) John Ellis Wool (June 1 1862-December 17 1862 interim December 22 1862), Robert Cumming Schenck (December 17 1862-March 12 1863), William Walton Morris (temporary March 12 1863-March 20 1863), Robert Cumming Schenck (March 20 1863-August 10 1863), William Walton Morris (temporary August 10 1863-August 31 1863), Robert Cumming Schenck (August 31 1863-September 22 1863), William Walton (temporary September 22 1863-September 28 1863), Erastus Barnard Tyler (temporary September 28 1863-October 10 1863), Robert Cumming Schenck (October 10 1863-November 21 1863 interim December 5 1863), Henry Hayes Lockwood (November 21 1863-March 12 1864 interim March 22 1864), Lewis Wallace (March 12 1864-August 7 1864)

March 22 1862: The Middle Department was established, comprising New Jersey, Pennsylvania, Delaware, the Eastern Shores of Virginia and Maryland and Cecil, Harford, Baltimore, and Anne Arundel counties in Maryland. New Jersey, Pennsylvania, Delaware, the Eastern Shore of Maryland and of Virginia, and Cecil, Hartford, Baltimore and Anne Arundel counties of Maryland were transferred from the Department of the Potomac to the Middle Department. New Jersey, Pennsylvania, Delaware, the Eastern Shore of Maryland and of Virginia, and Cecil, Hartford, Baltimore and Anne Arundel counties of Maryland were transferred from the Department of the Potomac to the Middle Department. Major-General John Adams Dix assumed command of the Middle Department. The District of the Eastern Shore of Maryland was established in the Middle Department.

June 1 1862: Major-General John Ellis Wool was appointed to command the Middle Department, arriving on June 9th 1862.

June 9 1862: Major-General John Ellis Wool arrived to command the Middle Department, succeeding Major-General John Adams Dix.

July 12 1862: VIII Corps (Middle) was organised in the Middle Department. Major-General John Ellis Wool assumed command of VIII Corps (Middle).

December 17 1862: Brigadier-General Robert Cumming Schenck was appointed to command the Middle Department, arriving on December 22 1862, to succeed Major-General John Ellis Wool.

December 22 1862: Major-General Robert Cumming Schenck arrived to assume command of the Middle Department, succeeding Major-General John Ellis Wool.

February 6 1863: The state of New Jersey transferred from the Middle Department to the Department of the East.

March 12 1863: Colonel William Walton Morris assumed temporary command of the Middle Department, succeeding Major-General Robert Cumming Schenck.

March 16 1863: The District of Western Virginia was discontinued, and the territory of Western Virginia transferred from the Department of the Ohio to the Middle Department.

March 20 1863: Brigadier-General Robert Cumming Schenck assumed command of the Middle Department, succeeding Colonel William Walton Morris.

June 9 1863: Pennsylvania west of Johnstown and the Laurel Hill mountains, the counties of Hancock, Brooke and Ohio in the West Virginia “panhandle”, and the Ohio counties of Columbiana, Jefferson and Belmont, were transferred from the Middle Department and the Department of the Ohio to the Department of the Monongahela. Pennsylvania east of Johnstown and the Laurel Hill Mountains transferred from the Middle Department to the Department of the Susquehanna. Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.

July 3 1863: The District of Delaware was established in the Middle Department, comprising the state of Delaware.

August 3 1863: The territory of Maryland west of the Monocacy River and the territory around Harper’s Ferry were transferred from the Middle Department and the Department of the Potomac to the Department of West Virginia.

August 10 1863: Colonel William Walton Morris assumed temporary command of the Middle Department, succeeding Major-General Robert Cumming Schenck.

August 31 1863: Brigadier-General Robert Cumming Schenck assumed command of the Middle Department, succeeding Colonel William Walton Morris.

September 22 1863: Colonel William Walton Morris assumed temporary command of the Middle Department, succeeding Brigadier-General Robert Cummings Schenck.

September 28 1863: Brigadier-General Erastus Barnard Tyler assumed temporary command of the Middle Department, succeeding Colonel William Walton Morris.

October 10 1863: Brigadier-General Robert Cumming Schenck assumed command of the Middle Department, succeeding Brigadier-General Erastus Barnard Tyler.

November 21 1863: Brigadier-General Henry Hayes Lockwood was appointed to command the Middle Department, arriving on 5th December 1863, to succeed Major-General Robert Cumming Schenck.

December 5 1863: Brigadier-General Henry Hayes Lockwood arrived to command the Middle Department, succeeding Major-General Robert Cumming Schenck.

December 21 1863: Northampton and Accomac counties of Virginia were transferred from the Middle Department to the Department of Virginia and North Carolina.

March 12 1864: Major-General Lewis Wallace was appointed to command the Middle Department, arriving March 22nd 1864, to succeed Brigadier-General Henry Hayes Lockwood.

March 22 1864: Major-General Lewis Wallace arrived to command the Middle Department, succeeding Brigadier-General Henry Hayes Lockwood.

August 7 1864: The Middle Department transferred to the Middle Military Division. The District of the Eastern Shore of Maryland transferred with the Middle Department to the Middle Military Division. The District of Delaware transferred with the Middle Department to the Middle Military Division. VIII Corps (Middle) transferred with the Middle Department to the Middle Military Division.

District of the Eastern Shore of Maryland

(Established, March 22 1862-August 7 1864, transferred to Middle Military Division)

Henry Hayes Lockwood (March 22 1862-August 7 1864)

March 22 1862: The District of the Eastern Shore of Maryland was established in the Middle Department. Brigadier-General Henry Hayes Lockwood assumed command of the District of the Eastern Shore of Maryland.

August 7 1864: The District of the Eastern Shore of Maryland transferred with the Middle Department to the Middle Military Division.

District of Delaware

(Established, July 3 1863-August 7 1864, transferred to Middle Military Division)

Daniel Tyler (July 3 1863-January 19 1864), Henry Bethel Judd (temporary January 19 1864-April 4 1864), John Reese Kenly (April 4 1864-July 20 1864), Henry Hayes Lockwood (July 20 1864-August 7 1864)

July 3 1863: The District of Delaware was established in the Middle Department, comprising the state of Delaware. Brigadier-General Daniel Tyler assumed command of the District of Delaware.

January 19 1864: Major Henry Bethel Judd assumed temporary command of the District of Delaware, succeeding Brigadier-General Daniel Tyler.

March 12 1864: Fort Delaware was detached from the District of Delaware (Middle Department) to independent command under the War Department.

April 4 1864: Brigadier-General John Reese Kenly assumed command of the District of Delaware, succeeding Major Henry Bethel Judd.

July 20 1864: Brigadier-General Henry Hayes Lockwood assumed command of the District of Delaware, succeeding Brigadier-General John Reese Kenly.

August 7 1864: The District of Delaware transferred with the Middle Department to the Middle Military Division.

VIII Corps Middle

(Established, July 12 1862-August 7 1864, transferred to Middle Military Division)

John Ellis Wool (July 12 1862-December 22 1862), Robert Cumming Schenck (December 22 1862-March 12 1863), William Walton Morris (temporary March 12 1863-March 20 1863), Robert Cumming Schenck (March 20 1863-August 10 1863), William Walton Morris (temporary August 10 1863-August 31 1863), Robert Cumming Schenck (August 31 1863-September 22 1863), William Walton Morris (temporary September 22 1863-September 28 1863), Erastus Barnard Tyler (temporary September 28 1863-October 10 1863), Robert Cumming Schenck (October 10 1863-December 5 1863), Henry Hayes Lockwood (December 5 1863-March 12 1864 interim March 22 1864), Lewis Wallace (March 12 1864-August 7 1864)

July 12 1862: VIII Corps (Middle) was established in the Middle Department. Major-General John Ellis Wool assumed command of VIII Corps (Middle).

December 22 1862: Major-General Robert Cumming Schenck assumed command of VIII Corps (Middle), succeeding Major-General John Ellis Wool.

March 12 1863: Colonel William Walton Morris assumed temporary command of VIII Corps (Middle), succeeding Major-General Robert Cumming Schenck.

March 20 1863: Brigadier-General Robert Cumming Schenck assumed command of VIII Corps, succeeding Colonel William Walton Morris.

August 10 1863: Colonel William Walton Morris assumed temporary command of VIII Corps (Middle), succeeding Major-General Robert Cumming Schenck.

August 31 1863: Major-General Robert Cumming Schenck assumed command of VIII Corps (Middle), succeeding Colonel William Walton Morris.

September 22 1863: Colonel William Walton Morris assumed temporary command of VIII Corps (Middle), succeeding Brigadier-General Robert Cummings Schenck.

September 28 1863: Brigadier-General Erastus Barnard Tyler assumed temporary command VIII Corps (Middle), succeeding Colonel William Walton Morris.

October 10 1863: Brigadier-General Robert Cumming Schenck assumed command of VIII Corps (Middle), succeeding Brigadier-General Erastus Barnard Tyler.

December 5 1863: Brigadier-General Henry Hayes Lockwood assumed command of VIII Corps (Middle), succeeding Major-General Robert Cumming Schenck.

March 12 1864: Major-General Lewis Wallace was appointed to command VIII Corps (Middle), arriving on March 22nd 1864, to succeed Brigadier-General Henry Hayes Lockwood.

March 22 1864: Major-General Lewis Wallace arrived to command VIII Corps (Middle), succeeding Brigadier-General Henry Hayes Lockwood.

August 7 1864: VIII Corps (Middle) transferred with the Middle Department to the Middle Military Division.

Department of the Rappahannock

(Established, from I Corps Potomac, April 4 1862-June 26 1862, discontinued, to III Corps Virginia)

Irvin McDowell (April 4 1862-June 26 1862)

April 4 1862: The Department of the Rappahannock was established, comprising the portion of Virginia east of the Blue Ridge and west of the Fredericksburg & Richmond Railroad, Washington and the District of Columbia and the part of Maryland between the Potomac and Patuxent Rivers, transferred from the Department of the Potomac. The territory of Maryland between the Potomac and Patuxent Rivers, the District of Columbia and Virginia east of the Blue Ridge Mountains and west of the Fredericksburg & Richmond Railroad transferred from the Department of the Potomac to the Department of the Rappahannock. I Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Rappahannock. Major-General Irvin McDowell assumed command of the Department of the Rappahannock. The Military District of Washington transferred to the Department of the Rappahannock. Although the title was officially discontinued, the field forces of the Department of the Rappahannock effectively remained and were later renamed as I Corps (Potomac)

June 1 1862: The territory of Northeastern Virginia transferred from the Department of the Potomac to the Department of the Rappahannock.

June 8 1862: The Piedmont region and the Bull Run Mountains of Virginia were transferred from the Department of the Rappahannock to the Department of the Shenandoah.

June 26 1862: The Department of the Rappahannock was discontinued. The Military District of Washington transferred from the Department of the Rappahannock and transferred to the War Department.

Military District of Washington

(Transferred, from War Department, April 4 1862-June 26 1862, transferred to War Department)

James Samuel Wadsworth (April 4 1862-June 26 1862)

April 4 1862: The Military District of Washington transferred to the Department of the Rappahannock. Brigadier-General James Samuel Wadsworth retained command of the Military District of Washington

June 26 1862: The Military District of Washington transferred from the Department of the Rappahannock to the War Department.

Department of the Shenandoah

(Established, April 4 1862-June 26 1862, discontinued, to II Corps Virginia)

Nathaniel Prentiss Banks (April 4 1862-June 26 1862)

April 4 1862: The Department of the Shenandoah was established, comprising Maryland west of the Blue Ridge Mountains and east of the Mountain Department (namely, Flintstone Creek, south to Branch Mountain, Town Hill Mountain, Branch Big Ridge Mountain, North Shenandoah Mountain, Purgatory Mountain and Allegheny Mountain. The parts of Maryland and Virginia west of the Blue Ridge Mountains and east of the Mountain Department were transferred from the Department of the Potomac to the Department of the Shenandoah. V Corps (Potomac) was discontinued, and its forces incorporated into the Department of the Shenandoah. Major-General Nathaniel Prentiss Banks was appointed to command the Department of the Shenandoah, arriving on 12th April 1862.

April 12 1862: Major-General Nathaniel Prentiss Banks arrived to command the Department of the Shenandoah.

June 8 1862: The parts of Virginia west of the road running from Williamsport to Martinsburg, Winchester, Strasburg, Harrisonville, Staunton and then south to the Blue Ridge Mountains were transferred from the Department of the Shenandoah to the Mountain Department.

June 8 1862: The Piedmont region and the Bull Run Mountains of Virginia were transferred from the Department of the Rappahannock to the Department of the Shenandoah.

June 26 1862: The Department of the Shenandoah was discontinued.

Military District of Washington

(Transferred from Department of the Rappahannock, June 26 1862-February 2 1863, transferred to Department of Washington)

James Samuel Wadsworth (June 26 1862-September 7 1862), Nathaniel Prentiss Banks (September 7 1862-October 27 1862), Samuel Peter Heintzelman (October 27 1862-February 23 1863)

June 26 1862: The Military District of Washington transferred from the Department of the Rappahannock to the War Department. Brigadier-General James Samuel Wadsworth retained command of the Military District of Washington.

September 7 1862: Major-General Nathaniel Prentiss Banks assumed command of the Military District of Washington, succeeding Brigadier-General James Samuel Wadsworth.

October 27 1862: Major-General Samuel Peter Heintzelman assumed command of the Military District of Washington, succeeding Major-General Nathaniel Prentiss Banks.

February 2 1863: The Military District of Washington was discontinued, and its territory incorporated into the Department of Washington.

Army of Virginia

(Established, June 26 1862-September 2 1862, discontinued, to Department of the Potomac)

John Pope (June 26 1862-September 2 1862)

June 26 1862: The Army of Virginia was established under the War Department, operating within the territory of but independently of the Department of the Potomac. Major-General John Pope assumed command of the Army of Virginia. I Corps (Virginia) was established in the Army of Virginia, comprising the field forces formerly in the Mountain Department. II Corps (Virginia) was established in the Army of Virginia, comprising the field forces formerly in the Department of the Shenandoah. III Corps (Virginia) was established in the Army of Virginia, comprising the field forces formerly in the Department of the Rappahannock.

September 2 1862: The Army of Virginia transferred to the Department of the Potomac. I Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. II Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac. III Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac.

I Corps Virginia

(Established, from Mountain Department, June 26 1862-September 2 1862, transferred to Department of the Potomac)

John Charles Frémont (June 26 1862-June 28 1862), Robert Cumming Schenck (temporary June 28 1862-June 29 1862), Franz Sigel (June 29 1862-July 7 1862), Robert Cumming Schenck (temporary July 7 1862-July 12 1862), Franz Sigel (July 12 1862-September 2 1862)

June 26 1862: I Corps (Virginia) was established, comprising the field forces formerly in the Mountain Department. Major-General John Charles Frémont assumed command I Corps (Virginia).

June 28 1862: Brigadier-General Robert Cumming Schenck assumed temporary command I Corps (Virginia), succeeding Major-General John Charles Frémont.

June 29 1862: Major-General Franz Sigel assumed command of I Corps (Army of Virginia), succeeding Brigadier-General Robert Cumming Schenck.

July 7 1862: Brigadier-General Robert Cumming Schenck assumed temporary command of I Corps (Virginia), succeeding Major-General Franz Sigel.

July 12 1862: Major-General Franz Sigel assumed command of I Corps (Virginia), succeeding Brigadier-General Robert Cumming Schenck.

September 2 1862: I Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac.

II Corps Virginia

(Established, from Mountain Department, June 26 1862-September 2 1862, transferred to Department of the Potomac)

Nathaniel Prentiss Banks (June 26 1862-September 2 1862)

June 26 1862: II Corps (Virginia) was established, comprising the field forces formerly in the Department of the Shenandoah. Major-General Nathaniel Prentiss Banks assumed command II Corps (Virginia).

September 2 1862: II Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac.

III Corps Virginia

(Established, from Mountain Department, June 26 1862-September 2 1862, transferred to Department of the Potomac)

Irvin McDowell (June 26 1862-September 2 1862)

June 26 1862: III Corps (Virginia) was established., comprising the field forces formerly in the Department of the Rappahannock. Major-General Irvin McDowell assumed command III Corps (Virginia).

September 2 1862: III Corps (Virginia) transferred with the Army of Virginia to the Department of the Potomac.

Department of Washington

(Established, from Military District of Washington, February 2 1863-August 7 1864, transferred to Middle Military Division)

Samuel Peter Heintzelman (February 2 1863-October 13 1863), Christopher Columbus Augur (October 13 1863-August 7 1864)

February 2 1863: The Department of Washington was established, comprising the country north of the Potomac River in Maryland from Piscataway Creek to Annapolis Junction, to the mouth of the Monocacy River and south by Goose Creek and the mouth of the Bull Run Mountains to the mouth of the Occoquan Creek, transferred from the Military District of Washington and the Department of the Potomac. Major-General Samuel Peter Heintzelman was appointed to command the Department of Washington, arriving on 7th February 1863. XXII Corps (Washington) was established in the Department of Washington. The District of Alexandria was established in the Department of Washington. The District of Washington was established in the Department of Washington.

February 7 1863: Major-General Samuel Peter Heintzelman arrived to command the Department of Washington.

October 13 1863: Major-General Christopher Columbus Augur assumed command of the Department of Washington, succeeding Major-General Samuel Peter Heintzelman.

June 21 1864: St Mary’s county, Maryland, transferred from the Department of Virginia and North Carolina to the Department of Washington. The part of Maryland between the Potomac and Patuxent Rivers transferred from the Department of the Potomac to the Department of Washington.

July 7 1864: The District of St Mary’s transferred from the Department of Virginia and North Carolina to the Department of Washington. It comprised the county of St Mary’s in Maryland and the Point Lookout prison camp.

August 7 1864: The Department of Washington transferred to the Middle Military Division. The District of Alexandria transferred with the Department of Washington to the Middle Military Division. The District of Washington transferred with the Department of Washington to the Middle Military Division. The District of St Mary’s transferred with the Department of Washington to the Middle Military Division. XXII Corps (Washington) transferred with the Department of Washington to the Middle Military Division.

District of Alexandria

(Established, February 2 1863-August 7 1864, transferred to Middle Military Division)

John Potts Slough (February 2 1863-August 7 1864)

February 2 1863: The District of Alexandria was established and transferred to the Department of Washington, comprising the vicinity of Alexandria, Virginia. Brigadier-General John Potts Slough assumed command of the District of Alexandria.

August 7 1864: The District of Alexandria transferred with the Department of Washington to the Middle Military Division.

District of Washington

(Established, February 2 1863-August 7 1864, transferred to Middle Military Division)

John Henry Martindale (February 2 1863-May 2 1864), Moses N Wisewell (May 2 1864-August 7 1864)

February 2 1863: The District of Washington was established in the Department of Washington, comprising the territory formerly under the authority of the Military District of Washington. Brigadier-General John Henry Martindale assumed command of the District of Washington.

May 2 1864: Colonel Moses N Wisewell assumed command of the District of Washington, succeeding John Henry Martindale.

August 7 1864: The District of Washington transferred with the Department of Washington to the Middle Military Division.

District of St Mary’s

(Transferred, from Department of Virginia and North Carolina, July 7 1864-August 7 1864, transferred to Middle Military Division)

James Barnes (July 7 1864-August 7 1864)

July 7 1864: The District of St Mary’s transferred from the Department of Virginia and North Carolina to the Department of Washington. It comprised the county of St Mary’s in Maryland and the Point Lookout prison camp. Brigadier-General James Barnes assumed command of the District of St Mary’s, succeeding Colonel Alonzo Granville Draper.

August 7 1864: The District of St Mary’s transferred with the Department of Washington to the Middle Military Division.

XXII Corps Washington

(Established, February 2 1863-August 7 1864, transferred to Middle Military Division)

Samuel Peter Heintzelman (February 2 1863-October 13 1863), Christopher Columbus Augur (October 13 1863-August 7 1864)

February 2 1863: XXII Corps (Washington) was established in the Department of Washington. Major-General Samuel Peter Heintzelman assumed command of XXII Corps (Washington).

October 13 1863: Major-General Christopher Columbus Augur assumed command of XXII Corps (Washington), succeeding Major-General Samuel Peter Heintzelman.

August 7 1864: XXII Corps (Washington) transferred with the Department of Washington to the Middle Military Division.

Department of the Monongahela

(Established, June 9 1863-April 6 1864, district, to Department of the Susquehanna)

William Thomas Harbaugh Brooks (June 9 1863-April 6 1864)

June 9 1863: The Department of the Monongahela was established, with headquarters at Pittsburgh, Pennsylvania, comprising Pennsylvania west of Johnstown and the Laurel Hill mountains, the counties of Hancock, Brooke and Ohio in the West Virginia “panhandle”, and the Ohio counties of Columbiana, Jefferson and Belmont. These territories were transferred from the Middle Department and the Department of the Ohio. Columbiana, Jefferson and Belmont counties, Ohio, were transferred from the District of Ohio in the Department of the Ohio to the Department of the Monongahela. Major-General William Thomas Harbaugh Brooks was appointed to command the Department of the Monongahela, arriving on 11th June 1863.

June 9 1863: Major-General William Thomas Harbaugh Brooks arrived to command the Department of the Monongahela.

October 12 1863: Hancock, Brooke and Ohio counties in West Virginia were transferred from the Department of the Monongahela to the Department of West Virginia. The counties of Columbiana, Belmont and Jefferson in Ohio were transferred from the Department of the Monongahela to the Department of West Virginia.

April 6 1864: The Department of the Monongahela was discontinued, and its territory allocated to the Department of the Susquehanna.

Department of the Susquehanna

(Established, June 9 1863-August 7 1864, transferred to Middle Military Division)

Darius Nash Couch (June 9 1863-August 7 1864)

June 9 1863: The Department of the Susquehanna was established with headquarters at Chambersburg, Pennsylvania. The territory of authority comprised Pennsylvania east of Johnstown and the Laurel Hill Mountains transferred from the Middle Department. Major-General Darius Nash Couch was appointed to command the Department of the Susquehanna, arriving on 11th June 1863.

June 9 1863: Major-General Darius Nash Couch arrived to command the Department of the Susquehanna.

August 20 1863: Lehigh District was established in the Department of the Susquehanna, comprising the counties of Berks, Lehigh, Schuylkill, Northampton, Carbon, Monroe, Luzerne and Columbia counties in Pennsylvania.

April 6 1864: The Department of the Monongahela was discontinued, and its territory allocated to the Department of the Susquehanna.

June 27 1864: District of the Monongahela was established in the Department of the Susquehanna, comprising the state of Pennsylvania west of Laurel Hill and Columbiana, Belmont and Jefferson counties in Ohio.

July 31 1864: The District of Brandywine was established in the Department of the Susquehanna, comprising the territory between the Blue Ridge Mountains and the Susquehanna River and Dauphine, Lancaster, Chester, Delaware, Bucks, Philadelphia and Montgomery counties, Pennsylvania.

August 7 1864: The Department of the Susquehanna transferred to the Middle Military Division. Lehigh District transferred with the Department of the Susquehanna to the Middle Military Division. The District of the Monongahela transferred with the Department of the Susquehanna to the Middle Military Division. The District of the Brandywine transferred with the Department of the Susquehanna to the Middle Military Division.

Lehigh District

(Established, August 20 1863-August 7 1864, transferred to Middle Military Division)

Franz Sigel (August 20 1863-August 7 1864)

August 20 1863: Lehigh District was established in the Department of the Susquehanna, comprising the counties of Berks, Lehigh, Schuylkill, Northampton, Carbon, Monroe, Luzerne and Columbia counties in Pennsylvania. Major-General Franz Sigel was assigned to command Lehigh District; de facto command was exercised by Brigadier-General Orris Sanford Ferry.

August 7 1864: Lehigh District transferred with the Department of the Susquehanna to the Middle Military Division.

District of the Monongahela

(Established, June 27 1864-August 7 1864, transferred to Middle Military Division)

Thomas Algeo Rowley (June 27 1864-August 7 1864)

June 27 1864: District of the Monongahela was established in the Department of the Susquehanna, comprising the state of Pennsylvania west of Laurel Hill and Columbiana, Belmont and Jefferson counties in Ohio. Brigadier-General Thomas Algeo Rowley assumed command of the District of the Monongahela.

August 7 1864: The District of the Monongahela transferred with the Department of the Susquehanna to the Middle Military Division.

District of the Brandywine

(Established, July 31 1864-August 7 1864, transferred to Middle Military Division)

George Cadwalader (July 31 1864-August 7 1864)

July 31 1864: The District of Brandywine was established in the Department of the Susquehanna, comprising the territory between the Blue Ridge Mountains and the Susquehanna River and Dauphine, Lancaster, Chester, Delaware, Bucks, Philadelphia and Montgomery counties, Pennsylvania. Major-General George Cadwalader assumed command of the District of Brandywine.

August 7 1864: The District of the Brandywine transferred with the Department of the Susquehanna to the Middle Military Division.

Department of West Virginia

(Established, June 24 1863-August 7 1864, transferred, to Middle Military Division)

Benjamin Franklin Kelley (June 24 1863-February 29 1864 interim March 10 1864), Franz Sigel (February 29 1864-May 19 1864 interim May 24 1864), David Hunter (May 19 1864-July 25 1864 interim August 7 1864), George Crook (July 25 1864-August 7 1864)

June 24 1863: The Department of West Virginia was established, comprising western Virginia south of Ohio County and west of Hancock, Maryland, including the adjacent counties in Ohio. The Ohio counties south of Belmont and neighbouring western Virginia were transferred from the Department of the Ohio to the Department of West Virginia. Brigadier-General Benjamin Franklin Kelley was appointed to command the Department of West Virginia, arriving on 28th June 1863.

June 28 1863: Brigadier-General Benjamin Franklin Kelley arrived to command the Department of West Virginia.

July 2 1863: The Army of the Kanawha was established in the Department of West Virginia.

August 3 1863: The territory of Maryland west of the Monocacy River and the territory around Harper’s Ferry were transferred from the Middle Department and the Department of the Potomac to the Department of West Virginia.

October 12 1863: Hancock, Brooke and Ohio counties in West Virginia were transferred from the Department of the Monongahela to the Department of West Virginia. The counties of Columbiana, Belmont and Jefferson in Ohio were transferred from the Department of the Monongahela to the Department of West Virginia.

January 12 1864: Alton, Illinois. The counties of Hancock, Brooke and Ohio in West Virginia were transferred from the Department of West Virginia to the Northern Department.

February 29 1864: Major-General Franz Sigel was appointed to command the Department of West Virginia arriving on 10th March 1864.

March 10 1864: Major-General Franz Sigel arrived to command the Department of West Virginia.

May 19 1864: Major-General David Hunter was appointed to command the Department of West Virginia, arriving on 21st May 1864, to succeed Major-General Franz Sigel.

May 21 1864: Major-General David Hunter arrived to command the Department of West Virginia, succeeding Major-General Franz Sigel. The Army of the Shenandoah was established in the Department of West Virginia.

May 20 1864: The District of Harper’s Ferry was established in the Department of West Virginia, comprising the line of the Baltimore & Ohio Railroad from Monocacy to Hancock, Maryland.

July 3 1864: The Army of the Shenandoah was discontinued, and part of the forces incorporated into the Army of the Kanawha.

July 25 1864: Brigadier-General George Crook was appointed to temporary command of the Department of West Virginia, arriving on 9th August 1864.

August 7 1864: The Department of West Virginia transferred to the Middle Military Division. The District of Harper’s Ferry transferred with the Department of West Virginia to the Middle Military Division. The Army of the Kanawha transferred with the Department of West Virginia to the Middle Military Division. The Army of the Shenandoah transferred with the Department of West Virginia to the Middle Military Division.

District of Harper’s Ferry

(Established, May 24 1864-August 7 1864, transferred to Middle Military Division)

Franz Sigel (May 24 1864-July 7 1864), Albion Parris Howe (July 7 1864-August 7 1864)

May 20 1864: The District of Harper’s Ferry was established in the Department of West Virginia, comprising the line of the Baltimore & Ohio Railroad from Monocacy to Hancock, Maryland. Major-General Franz Sigel assumed command of the District of Harper’s Ferry.

July 7 1864: Brigadier-General Albion Parris Howe assumed command of the District of Harper’s Ferry, succeeding Major-General Franz Sigel.

August 7 1864: The District of Harper’s Ferry transferred with the Department of West Virginia to the Middle Military Division.

Army of the Kanawha

(Established, July 2 1863-August 7 1864, transferred to Middle Military Division)

George Crook (July 2 1863-August 7 1864)

July 2 1863: The Army of the Kanawha was established in the Department of West Virginia. Brigadier-General George Crook assumed command of the Army of the Kanawha.

July 3 1864: The Army of the Shenandoah was discontinued, and part of the forces incorporated into the Army of the Kanawha.

August 7 1864: The Army of the Kanawha transferred with the Department of West Virginia to the Middle Military Division.

Army of the Shenandoah

(Established, May 21 1864-July 3 1864, discontinued, to Army of the Kanawha)

David Hunter (May 21 1864-July 3 1864)

May 21 1864: The Army of the Shenandoah was established in the Department of West Virginia. Major-General David Hunter assumed command of the Army of the Shenandoah.

July 3 1864: The Army of the Shenandoah was discontinued, and part of the forces incorporated into the Army of the Kanawha.

District of St Mary’s

(Established, July 23 1863-December 2 1863, transferred to Department of Virginia and North Carolina)

Gilman Marston (July 23 1863-December 2 1863)

July 23 1863: The District of St Mary’s was established under the War Department, comprising St Mary’s county in Maryland and was detached from the Department of the Potomac. Brigadier-General Gilman Marston assumed command of the District of St Mary’s.

December 2 1863: The District of St Mary’s transferred from the War Department to the Department of Virginia and North Carolina.

Middle Military Division

(Established, August 7 1864-June 27 1865, transferred to the Military Division of the Atlantic)

Philip Henry Sheridan (August 7 1864-February 27 1865), Winfield Scott Hancock (February 27 1865-February 28 1865), Alfred Thomas Archimedes Torbert (interim February 28 1865), Winfield Scott Hancock (February 28 1865-June 27 1865)

August 7 1864: The Middle Military Division was established, comprising the Department of Washington, the Department of the Susquehanna, the Middle Department and the Department of West Virginia. Major-General Philip Henry Sheridan assumed temporary command of the Middle Military Division. The Middle Department transferred to the Middle Military Division. The Department of the Susquehanna transferred to the Middle Military Division. The Department of Washington transferred to the Middle Military Division. The Department of West Virginia transferred to the Middle Military Division. The District of the Eastern Shore of Maryland transferred with the Middle Department to the Middle Military Division. The District of Delaware transferred with the Middle Department to the Middle Military Division. VIII Corps (Middle) transferred with the Middle Department to the Middle Military Division. The District of Alexandria transferred with the Department of Washington to the Middle Military Division. The District of Washington transferred with the Department of Washington to the Middle Military Division. The District of St Mary’s transferred with the Department of Washington to the Middle Military Division. XXII Corps (Washington) transferred with the Department of Washington to the Middle Military Division. Lehigh District transferred with the Department of the Susquehanna to the Middle Military Division. The District of the Monongahela transferred with the Department of the Susquehanna to the Middle Military Division. The District of the Brandywine transferred with the Department of the Susquehanna to the Middle Military Division. The District of Harper’s Ferry transferred with the Department of West Virginia to the Middle Military Division. The Army of the Kanawha transferred with the Department of West Virginia to the Middle Military Division. The Army of the Shenandoah was established in the Middle Military Division.

August 8 1864: The Army of the Kanawha was discontinued. The Army of West Virginia was established in the Department of West Virginia.

September 21 1864: Major-General Philip Henry Sheridan assumed full command of the Middle Military Division. The Department of the Susquehanna was discontinued, and its territory transferred to the Department of Pennsylvania. The Department of Pennsylvania was established in the Middle Military Division, comprising the state of Pennsylvania and the counties of Columbiana, Belmont and Jefferson counties of Ohio.

February 27 1865: Major-General Winfield Scott Hancock assumed command of the Middle Military Division, succeeding Major-General Philip Henry Sheridan.

February 28 1865: Brigadier-General Alfred Thomas Archimedes Torbert assumed temporary command of the Middle Military Division, interim for Major-General Winfield Scott Hancock. Major-General Winfield Scott Hancock assumed command of the Middle Military Division, succeeding Brigadier-General Alfred Thomas Archimedes Torbert.

March 25 1865: Cavalry Corps (Shenandoah) was discontinued, and is forces incorporated into Sheridan’s Cavalry Command.

May 17 1865: VIII Corps (Middle) transferred from the Middle Department to the direct command of the Middle Military Division.

June 27 1865: The Middle Military Division was discontinued. The Department of Pennsylvania was discontinued, and its territory incorporated into the Middle Department and the Department of the Ohio. The Department of the Potomac was discontinued, and its territory incorporated into the Middle Department. The Military Division of the Atlantic was established, comprising the Department of the East, the Department of Virginia, the Department of North Carolina, the Department of South Carolina, and the Middle Department. The Middle Department transferred to the Military Division of the Atlantic. The Army of the Shenandoah was discontinued. The Department of Washington transferred to the Military Division of the Atlantic. The Department of West Virginia was discontinued, and its territory was incorporated into the Middle Department and the Department of the Ohio. VIII Corps (Middle) transferred to the Military Division of the Atlantic. The District of Washington transferred with the Department of Washington to the Military Division of the Atlantic.

Middle Department

(Transferred to Middle Military Division, August 7 1864-June 27 1865, transferred to Military Division of the Atlantic)

Lewis Wallace (August 7 1864-February 1 1865), William Walton Morris (temporary February 1 1865-April 19 1865), Lewis Wallace (April 19 1865-June 27 1865)

August 7 1864: The Middle Military Division was established, comprising the Department of Washington, the Department of the Susquehanna, the Middle Department and the Department of West Virginia. The Middle Department transferred to the Middle Military Division. Major-General Lewis Wallace retained command of the Middle Department. The District of the Eastern Shore of Maryland transferred with the Middle Department to the Middle Military Division. The District of Delaware transferred with the Middle Department to the Middle Military Division. VIII Corps (Middle) transferred with the Middle Department to the Middle Military Division.

February 1 1865: Colonel William Walton Morris assumed temporary command of the Middle Department, succeeding Major-General Lewis Wallace.

March 24 1865: The District of Delaware was discontinued, and incorporated into the District of Delaware and the Eastern Shore. The District of the Eastern Shore of Maryland was discontinued, and incorporated into the District of Delaware and the Eastern Shore. The District of Delaware and the Eastern Shore was established in the Middle Department.

April 1 1865: The District of Annapolis was established and transferred to the Middle Department.

April 19 1865: Major-General Lewis Wallace assumed command of the Middle Department, succeeding Colonel William Walton Morris.

May 17 1865: VIII Corps (Middle) transferred from the Middle Department to the direct command of the Middle Military Division.

June 27 1865: The Department of Pennsylvania was discontinued, and its territory incorporated into the Middle Department and the Department of the Ohio. The Department of the Potomac was discontinued, and its territory incorporated into the Middle Department. The Middle Department transferred to the Military Division of the Atlantic. The District of Annapolis transferred with the Middle Department to the Military Division of the Atlantic. The District of Delaware and the Eastern Shore transferred with the Middle Department to the Military Division of the Atlantic. VIII Corps (Middle) transferred from the Middle Military Division to the Military Division of the Atlantic.

District of Delaware

(Transferred to Middle Military Division, August 7 1864-March 24 1865, discontinued, to District of Delaware and the Eastern Shore)

Henry Hayes Lockwood (August 7 1864-August 20 1864), Samuel M Bowman (August 20 1864-March 24 1865)

August 7 1864: The District of Delaware transferred with the Middle Department to the Middle Military Division. Brigadier-General Henry Hayes Lockwood retained command of the District of Delaware.

August 20 1864: Colonel Samuel M Bowman assumed command of the District of Delaware, succeeding Brigadier-General Henry Hayes Lockwood.

March 24 1865: The District of Delaware was discontinued, and incorporated into the District of Delaware and the Eastern Shore.

District of the Eastern Shore of Maryland

(Transferred to Middle Military Division, August 7 1864-March 24 1865, discontinued, to District of Delaware and the Eastern Shore)

Henry Hayes Lockwood (August 7 17864-January 5 1865), John Reese Kenly (January 5 1865-March 24 1865)

August 7 1864: The District of the Eastern Shore of Maryland transferred with the Middle Department to the Middle Military Division. Brigadier-General Henry Hayes Lockwood retained command of the District of the Eastern Shore of Maryland.

January 5 1865: Brigadier-General John Reese Kenly assumed command of the District of the Eastern Shore of Maryland, succeeding Brigadier-General Henry Hayes Lockwood.

March 24 1865: The District of the Eastern Shore of Maryland was discontinued, and incorporated into the District of Delaware and the Eastern Shore.

District of Delaware and the Eastern Shore

(Established, from District of Delaware and District of the Eastern Shore of Maryland, March 24 1865-June 27 1865, transferred to Military Division of the Atlantic)

John Reese Kenly (March 24 1865-June 5 1865), John Moulder Wilson (June 5 1865-June 27 1865)

March 24 1865: The District of Delaware was discontinued, and incorporated into the District of Delaware and the Eastern Shore. The District of the Eastern Shore of Maryland was discontinued, and incorporated into the District of Delaware and the Eastern Shore. The District of Delaware and the Eastern Shore was established in the Middle Department. It included the territory formerly in the District of Delaware and the District of the Eastern Shore of Maryland. Brigadier-General John Reese Kenly assumed command of the District of Delaware and the Eastern Shore.

June 5 1865: Lieutenant-Colonel USV John Moulder Wilson assumed temporary command of the District of Delaware and the Eastern Shore, succeeding Brigadier-General John Reese Kenly.

June 27 1865: The District of Delaware and the Eastern Shore transferred with the Middle Department to the Military Division of the Atlantic.

District of Annapolis

(Established, April 1 1865-June 27 1865, transferred to Military Division of the Atlantic)

Frederic Dummer Sewall (April 1 1865-June 27 1865)

April 1 1865: The District of Annapolis was established and transferred to the Middle Department. It comprised the territory around Annapolis, Maryland, and Camp Parole. Colonel Frederic Dummer Sewall assumed command of the District of Annapolis.

June 27 1865: The District of Annapolis transferred with the Middle Department to the Military Division of the Atlantic.

VIII Corps Middle

(Transferred to Middle Military Division, August 7 1864-May 17 1865, transferred to Middle Military Division)

Lewis Wallace (August 7 1864-Febuary 1 1865), William Walton Morris (temporary February 1 1865-April 19 1865), Lewis Wallace (April 19 1865-May 17 1865)

August 7 1864: VIII Corps (Middle) transferred with the Middle Department to the Middle Military Division. Major-General Lewis Wallace retained command VIII Corps (Middle).

February 1 1865: Colonel William Walton Morris assumed temporary command of VIII Corps (Middle), succeeding Major-General Lewis Wallace.

April 19 1865: Major-General Lewis Wallace assumed command of VIII Corps (Middle), succeeding Colonel William Walton Morris.

May 17 1865: VIII Corps (Middle) transferred from the Middle Department to the direct command of the Middle Military Division.

Department of Washington

(Transferred to Middle Military Division, August 7 1864-June 27 1865, transferred to Military Division of the Atlantic)

Christopher Columbus Augur (August 7 1864-June 7 1865), John Grubb Parke (temporary June 7 1865-June 26 1865), Christopher Columbus Augur (June 26 1865-June 27 1865)

August 7 1864: The Department of Washington transferred to the Middle Military Division. Major-General Christopher Columbus Augur retained command of the Department of Washington. The District of Alexandria transferred with the Department of Washington to the Middle Military Division. The District of Washington transferred with the Department of Washington to the Middle Military Division. The District of St Mary’s transferred with the Department of Washington to the Middle Military Division. XXII Corps (Washington) transferred with the Department of Washington to the Middle Military Division.

April 24 1865: IX Corps (Potomac) transferred from the Army of the Potomac to the Department of Washington.

April 26 1865: The District of Patuxent was established in the Department of Washington. The District of the Northern Neck was established in the Department of Washington. The District of Washington was reorganised to include the part of the Department of Washington north of the Potomac River except the city of Washington and the territory between the Potomac and Patuxent Rivers south of the Piscataway River.

May 18 1865: The District of the Northern Neck was discontinued, and its territory transferred to the District of Washington. The District of Patuxent was discontinued.

June 7 1865: Major-General John Grubb Parke assumed temporary command of the Department of Washington., succeeding Major-General Christopher Columbus Augur.

June 26 1865: Major-General Christopher Columbus Augur assumed command of the Department of Washington, succeeding Major-General John Grubb Parke. XXII Corps (Washington) was discontinued.

June 27 1865: The Department of Washington transferred from the discontinued Middle Military Division to the Military Division of the Atlantic. The District of Alexandria transferred with the Department of Washington to the Military Division of the Atlantic. The District of Washington transferred with the Department of Washington to the Military Division of the Atlantic. IX Corps (Washington) transferred with the Department of Washington to the Military Division of the Atlantic.

District of Alexandria

(Transferred to Middle Military Division, August 7 1864-June 27 1865, to Military Division of the Atlantic)

John Potts Slough (August 7 1864-November 21 1864), Henry Horatio Wells (temporary November 21 1864-January 1 1865), John Potts Slough (January 1 1865-April 26 1865), John Grubb Parke (April 26 1865-June 7 1865), John Potts Slough (June 7 1865-June 27 1865)

August 7 1864: The District of Alexandria transferred with the Department of Washington to the Middle Military Division. Brigadier-General John Potts Slough retained command of the District of Alexandria.

November 21 1864: Colonel Henry Horatio Wells assumed temporary command of the District of Alexandria, succeeding Brigadier-General John Potts Slough.

January 1 1865: Brigadier-General John Potts Slough assumed command of the District of Alexandria, succeeding Colonel Henry Horatio Wells.

April 26 1865: Major-General John Grubb Parke assumed command of the District of Alexandria, succeeding Brigadier-General John Potts Slough.

June 7 1865: Brigadier-General John Potts Slough assumed command of the District of Alexandria, succeeding Major-General John Grubb Parke.

June 27 1865: The District of Alexandria transferred with the Department of Washington to the Military Division of the Atlantic.

District of Washington

(Transferred to Middle Military Division, August 7 1864-June 27 1865, transferred to Military Division of the Atlantic)

Moses N Wisewell (August 7 1864-April 26 1865), Orlando Bolivar Willcox (April 26 1865-June 27 1865)

August 7 1864: The District of Washington transferred with the Department of Washington to the Middle Military Division. Colonel Moses N Wisewell retained command of the District of Washington.

April 26 1865: The District of Washington was reorganised to include the part of the Department of Washington north of the Potomac River except the city of Washington and the territory between the Potomac and Patuxent Rivers south of the Piscataway River. Brigadier-General Orlando Bolivar Willcox assumed command of the District of Washington, succeeding Colonel Moses N Wisewell.

May 18 1865: The District of the Northern Neck was discontinued, and its territory transferred to the District of Washington.

June 27 1865: The District of Washington transferred with the Department of Washington to the Military Division of the Atlantic.

District of St Mary’s

(Transferred to Middle Military Division, August 7 1864-April 26 1865, discontinued)

James Barnes (August 7 1864-April 26 1865)

August 7 1864: The District of St Mary’s transferred with the Department of Washington to the Middle Military Division. Brigadier-General James Barnes retained command of the District of St Mary’s.

April 26 1865: The District of St Mary’s was discontinued.

District of Patuxent

(Established, April 26 1865-May 18 1865, discontinued)

Henry Horatio Wells (April 26 1865-May 18 1865)

April 26 1865: The District of Patuxent was established in the Department of Washington. It comprised the territory between the Potomac and Patuxent of Piscataway Creek. Colonel Henry Horatio Wells assumed command of the District of Patuxent.

May 18 1865: The District of Patuxent was discontinued.

District of the Northern Neck

(Established, April 26 1865-May 18 1865, discontinued, to District of Washington)

Nelson Bowman Sweitzer (April 26 1865-May 18 1865)

April 26 1865: The District of the Northern Neck was established in the Department of Washington. It comprised the territory between the Potomac and Rappahannock rivers and south of the Fredericksburg & Aquia Railroad. Colonel Nelson Bowman Sweitzer assumed command of District of the Northern Neck.

May 18 1865: The District of the Northern Neck was discontinued. Its territory transferred to the District of Washington.

XXII Corps Washington

(Transferred to Middle Military Division, August 7 1864-June 26 1865, discontinued)

Christopher Columbus Augur (August 7 1864-April 26 1865), John Grubb Parke (April 26 1865-June 26 1865)

August 7 1864: XXII Corps (Washington) transferred with the Department of Washington to the Middle Military Division. Major-General Christopher Columbus Augur retained command of XXII Corps (Washington).

April 26 1865: Major-General John Grubb Parke assumed command of XXII Corps (Washington), succeeding Major-General Christopher Columbus Augur.

June 26 1865: XXII Corps (Washington) was discontinued.

IX Corps Washington

(Transferred from Army of the Potomac, April 24 1865-June 27 1865, transferred to Military Division of the Atlantic)

John Grubb Parke (April 24 1865-June 7 1865), Orlando Bolivar Willcox (temporary June 7 1865-June 26 1865), John Grubb Parke (June 26 1865-June 27 1865)

April 24 1865: IX Corps (Potomac) transferred from the Army of the Potomac to the Department of Washington. Major-General John Grubb Parke retained command of IX Corps (Washington).

June 7 1865: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Washington), succeeding Major-General John Grubb Parke.

June 26 1865: Major-General John Grubb Parke assumed command of IX Corps (Washington), succeeding Brigadier-General Orlando Bolivar Willcox.

June 27 1865: IX Corps (Washington) transferred with the Department of Washington to the Military Division of the Atlantic.

Department of the Susquehanna

(Transferred to Middle Military Division, August 7 1864-December 1 1864, discontinued, to Department of Pennsylvania)

Darius Nash Couch (August 7 1864-December 1 1864)

August 7 1864: The Department of the Susquehanna transferred to the Middle Military Division. Major-General Darius Nash Couch retained command of the Department of the Susquehanna. The District of the Monongahela transferred with the Department of the Susquehanna to the Middle Military Division. The District of the Brandywine transferred with the Department of the Susquehanna to the Middle Military Division. Lehigh District transferred with the Department of the Susquehanna to the Middle Military Division.

August 18 1864: The District of Brandywine was discontinued.

September 6 1864: Juniata District was established in the Department of the Susquehanna, comprising the line of the Williamsport & Elmira Railroad, along the Susquehanna River to the Blue Ridge Mountains and the Maryland State Line; Adams, Cumberland, Franklin and York counties and the Laurel Hill mountains extending north to Johnstown.

December 1 1864: The Department of the Susquehanna was discontinued, and its territory transferred to the Department of Pennsylvania. The District of the Monongahela transferred from the Department of the Susquehanna to the Department of Pennsylvania. Juniata District transferred from the Department of the Susquehanna to the Department of Pennsylvania. Lehigh District was discontinued.

District of the Monongahela

(Transferred to Middle Military Division, August 7 1864-December 1 1864, transferred to Department of Pennsylvania)

Thomas Algeo Rowley (August 7 1864-December 1 1864)

August 7 1864: The District of the Monongahela transferred with the Department of the Susquehanna to the Middle Military Division. Brigadier-General Thomas Algeo Rowley retained command of the District of the Monongahela.

December 1 1864: The District of the Monongahela transferred from the Department of the Susquehanna to the Department of Pennsylvania.

District of the Brandywine

(Transferred to Middle Military Division, August 7 1864-August 18 1864, discontinued)

George Cadwalader (August 7 1864-August 18 1864)

August 7 1864: The District of the Brandywine transferred with the Department of the Susquehanna to the Middle Military Division. Major-General George Cadwalader retained command of the District of Brandywine.

August 18 1864: The District of Brandywine was discontinued.

Lehigh District

(Transferred to Middle Military Division, August 7 1864-December 1 1864, discontinued)

Franz Sigel (August 7 1864-November 9 1864), Thomas Scott Mather (November 9 1864-December 1 1864)

August 7 1864: Lehigh District transferred with the Department of the Susquehanna to the Middle Military Division. Major-General Franz Sigel retained command of Lehigh District.

November 9 1864: Colonel Thomas Scott Mather assumed command of Lehigh District, succeeding Major-General Franz Sigel.

December 1 1864: Lehigh District was discontinued.

Juniata District

(Established, September 6 1864-December 1 1864, transferred to Department of Pennsylvania)

Orris Sanford Ferry (September 6 1864-December 1 1864)

September 6 1864: Juniata District was established in the Department of the Susquehanna, comprising the line of the Williamsport & Elmira Railroad, along the Susquehanna River to the Blue Ridge Mountains and the Maryland State Line; Adams, Cumberland, Franklin and York counties and the Laurel Hill mountains extending north to Johnstown. Brigadier-General Orris Sanford Ferry assumed command of Juniata District.

December 1 1864: Juniata District transferred from the Department of the Susquehanna to the Department of Pennsylvania.

Department of West Virginia

(Transferred to Middle Military Division, August 7 1864-June 27 1865, discontinued, to Middle Department and Department of the Ohio)

David Hunter (interim August 7 1864-August 8 1864), Julius Stahel (interim August 8 1864-August 9 1864), George Crook (temporary August 7 1864-September 1 1864, September 1 1864-February 21 1865), John Dunlap Stevenson (temporary February 21 1865-February 26 1865 interim February 27 1865), Samuel Sprigg Carroll (interim February 27 1865-February 28 1865), Winfield Scott Hancock (February 26 1865-February 28 1865 interim March 1 1865), Samuel Sprigg Carroll (temporary February 28 1865-March 7 1865), Winfield Scott Hancock (March 7 1865-March 19 1865), George Crook (temporary March 19 1865-March 22 1865), Winfield Scott Hancock (March 22 1865-April 22 1865 interim April 24 1865), William Hemsley Emory (temporary April 24 1865-June 27 1865)

August 7 1864: The Department of West Virginia transferred to the Middle Military Division. Major-General David Hunter retained interim command of the Department of West Virginia pending the arrival of Brigadier-General George Crook. The District of Harper’s Ferry transferred with the Department of West Virginia to the Middle Military Division. The Army of the Kanawha transferred with the Department of West Virginia to the Middle Military Division.

August 8 1864: Major-General Julius Stahel assumed interim command of the Department of West Virginia, succeeding Major-General David Hunter, pending the arrival of Brigadier-General George Crook. The Army of the Kanawha was discontinued, and its forces transferred to the Army of West Virginia. The Army of West Virginia was established in the Department of West Virginia.

August 9 1864: Brigadier-General George Crook arrived to temporary command of the Department of West Virginia, succeeding Major-General Julius Stahel.

August 30 1864: Brigadier-General George Crook assumed full command of the Department of West Virginia, arriving on 1st September 1864.

September 1 1864: Brigadier-General George Crook arrived to full command of the Department of West Virginia.

December 19 1864: The Army of West Virginia was discontinued.

February 21 1865: Brigadier-General John Dunlap Stevenson assumed temporary command of the Department of West Virginia, succeeding Major-General George Crook.

February 25 1865: The District of Harper’s Ferry was discontinued.

February 26 1865: Major-General Winfield Scott Hancock was appointed to command the Department of West Virginia, arriving on 28th February 1865, to succeed Brigadier-General John Dunlap Stevenson.

February 27 1865: Brigadier-General Samuel Sprigg Carroll assumed interim command of the Department of West Virginia, succeeding Brigadier-General John Dunlap Stevenson interim pending the arrival of Major-General Winfield Scott Hancock.

February 28 1865: Major-General Winfield Scott Hancock arrived to assume command of the Department of West Virginia, but proceeded on to assume command of the Middle Military Division and delegated the Department to Brigadier-General Samuel Sprigg Carroll. Brigadier-General Samuel Sprigg Carroll assumed temporary command of the Department of West Virginia, arriving on 1st March 1865, after a period of interim command.

March 1 1865: Brigadier-General Samuel Sprigg Carroll arrived to temporary command the Department of West Virginia, succeeding Major-General Winfield Scott Hancock.

March 7 1865: Major-General Winfield Scott Hancock assumed command of the Department of West Virginia, succeeding Brigadier-General Samuel Sprigg Carroll.

March 19 1865: Major-General George Crook assumed temporary command of the Department of West Virginia, succeeding Major-General Winfield Scott Hancock.

March 22 1865: Major-General Winfield Scott Hancock assumed command of the Department of West Virginia, succeeding Major-General George Crook.

April 22 1865: Brigadier-General William Hemsley Emory was appointed to temporary command of the Department of West Virginia, arriving on 24th April 1865, to succeed Major-General William Scott Hancock.

April 24 1865: Brigadier-General William Hemsley Emory arrived to temporary command of the Department of West Virginia, succeeding Major-General Winfield Scott Hancock.

June 27 1865: The Department of West Virginia was discontinued, and its territory was incorporated into the Middle Department and the Department of the Ohio.

District of Harper’s Ferry

(Transferred to Middle Military Division, August 7 1864-February 25 1865, discontinued)

Albion Parris Howe (August 7 1864-August 8 1864), Max Weber (August 8 1864-August 15 1864), John Dunlap Stevenson (August 15 1864-February 21 1865), William Henry Seward (February 21 1865-February 25 1865)

August 7 1864: The District of Harper’s Ferry transferred with the Department of West Virginia to the Middle Military Division. Brigadier-General Albion Parris Howe retained command of the District of Harper’s Ferry.

August 8 1864: Brigadier-General Max Weber assumed command of the District of Harper’s Ferry, succeeding Brigadier-General Albion Parris Howe.

August 15 1864: Brigadier-General John Dunlap Stevenson assumed command of the District of Harper’s Ferry, succeeding Brigadier-General Max Weber.

February 21 1865: Brigadier-General William Henry Seward assumed command of the District of Harper’s Ferry, succeeding Brigadier-General John Dunlap Stevenson.

February 25 1865: The District of Harper’s Ferry was discontinued.

Army of the Kanawha

(Transferred to Middle Military Division, August 7 1864-August 8 1864, discontinued, to Army of West Virginia)

George Crook (August 7 1864-August 8 1864)

August 7 1864: The Army of the Kanawha transferred with the Department of West Virginia to the Middle Military Division. Brigadier-General George Crook retained command of the Army of the Kanawha.

August 8 1864: The Army of the Kanawha was discontinued, and its forces transferred to the Army of West Virginia.

Army of West Virginia

(Established, August 8 1864-December 19 1864, discontinued)

George Crook (August 8 1864-December 19 1864)

August 8 1864: The Army of the Kanawha was discontinued, and its forces transferred to the Army of West Virginia. The Army of West Virginia was established in the Department of West Virginia. Brigadier-General George Crook assumed command of the Army of West Virginia.

December 19 1864: The Army of West Virginia was discontinued.

Department of Pennsylvania

(Established, December 1 1864-June 27 1865)

George Cadwalader (December 1 1864-June 27 1865)

December 1 1864: The Department of Pennsylvania was established in the Middle Military Division, comprising the state of Pennsylvania and the counties of Columbiana, Belmont and Jefferson counties of Ohio. The Department of the Susquehanna was discontinued, and its territory transferred to the Department of Pennsylvania. Major-General George Cadwalader assumed command of the Department of Pennsylvania. The District of Philadelphia was established in the Department of Pennsylvania. The District of the Monongahela transferred from the Department of the Susquehanna to the Department of Pennsylvania.

June 15 1865: The District of Philadelphia was discontinued.

June 27 1865: The Department of Pennsylvania was discontinued, and its territory incorporated into the Middle Department and the Department of the Ohio. Juniata District was discontinued. The District of the Monongahela was discontinued.

District of Philadelphia

(Established, December 1 1864-June 15 1865, discontinued)

George Cadwalader (December 1 1864-December 16 1864), Orris Sanford Ferry (December 16 1864-June 15 1865)

December 1 1864: The District of Philadelphia was established in the Department of Pennsylvania. It comprised Philadelphia and the counties of Bucks, Chester, Delaware and Montgomery counties of Pennsylvania. Major-General George Cadwalader assumed command of the District of Philadelphia.

December 16 1864: Brigadier-General Orris Sanford Ferry assumed command of the District of Philadelphia, succeeding Major-General George Cadwalader.

June 15 1865: The District of Philadelphia was discontinued.

District of the Monongahela

(Transferred from Department of the Susquehanna, December 1 1864-June 27 1865, discontinued)

Thomas Algeo Rowley (December 1 1864-December 29 1864), Greenlief P Davis (December 29 1864-June 27 1865)

December 1 1864: The District of the Monongahela transferred from the Department of the Susquehanna to the Department of Pennsylvania. It consisted of the state of Pennsylvania west of laurel Hill and the counties of Columbiana, Belmont and Jefferson in Ohio. Brigadier-General Thomas Algeo Rowley retained command of the District of the Monongahela.

December 29 1864: Captain USV Greenlief P Davis assumed command of the District of the Monongahela, succeeding Brigadier-General Thomas Algeo Rowley.

June 27 1865: The District of the Monongahela was discontinued.

Juniata District

(Transferred from Department of the Susquehanna, December 1 1864-June 27 1865, discontinued)

Orris Sanford Ferry (December 1 1864-December 16 1864), Charles Hale Morgan (December 16 1864-June 27 1865)

December 1 1864: Juniata District transferred from the Department of the Susquehanna to the Department of Pennsylvania. Brigadier-General Orris Sanford Ferry retained command of Juniata District.

December 16 1864: Lieutenant-Colonel USA Charles Hale Morgan assumed command of Juniata District, succeeding Brigadier-General Orris Sanford Ferry.

June 27 1865: Juniata District was discontinued.

Army of the Shenandoah

(Established, August 7 1864-June 27 1865, discontinued)

Philip Henry Sheridan (August 7 1864-October 16 1864), Horatio Gouverneur Wright (temporary October 16 1864-October 19 1864), Philip Henry Sheridan (October 19 1864-March 7 1865), Winfield Scott Hancock (March 7 1865-April 19 1865), Alfred Thomas Archimedes Torbert (April 19 1865-June 27 1865)

August 7 1864: The Army of the Shenandoah was established in the Middle Military Division. Major-General Philip Henry Sheridan assumed command of the Army of the Shenandoah. Cavalry Corps (Shenandoah) was established in the Army of the Shenandoah. VI Corps (Potomac) transferred from the Army of the Potomac to the Army of the Shenandoah.

October 16 1864: Major-General Horatio Gouverneur Wright assumed temporary command of the Army of the Shenandoah, succeeding Major-General Philip Henry Sheridan.

October 19 1864: Major-General Philip Henry Sheridan assumed command of the Army of the Shenandoah, succeeding Major-General Henry Gouverneur Wright.

November 7 1864: XIX Corps (Shenandoah) was established in the Army of the Shenandoah. The elements of 1st Division and 2nd Division, known as ‘Detachment XIX Corps’ while serving in the Shenandoah Valley were designated XIX Corps (Shenandoah) while the 1st Division retained the interim title of XIX Corps (Gulf).

December 6 1864: VI Corps transferred from the Army of the Shenandoah to the Army of the Potomac.

March 7 1865: Major-General Winfield Scott Hancock assumed command of the Army of the Shenandoah, succeeding Major-General Philip Henry Sheridan.

March 20 1865: XIX Corps (Shenandoah) was discontinued.

March 25 1865: Cavalry Corps (Shenandoah) was discontinued, and is forces incorporated into Sheridan’s Cavalry Command.

March 26 1865: Sheridan’s Cavalry Command was established in the Department of the Potomac. It comprised the combined cavalry forces of the Army of the Potomac, the Army of the James and the Army of the Shenandoah.

April 19 1865: Brigadier-General Alfred Thomas Archimedes Torbert assumed command of the Army of the Shenandoah, succeeding Major-General Winfield Scott Hancock.

June 27 1865: The Army of the Shenandoah was discontinued.

VI Corps Shenandoah

(Transferred from Army of the Potomac, August 7 1864-December 6 1864, transferred to Army of the Potomac)

Horatio Gouverneur Wright (August 7 1864-October 16 1864), James Brewerton Ricketts (temporary October 16 1864-October 19 1864), George Washington Getty (interim October 19 1864), Horatio Gouverneur Wright (October 19 1864-December 6 1864)

August 7 1864: VI Corps (Potomac) transferred from the Army of the Potomac to the Army of the Shenandoah. Major-General Horatio Gouverneur Wright retained command of VI Corps (Shenandoah).

October 16 1864: Brigadier-General James Brewerton Ricketts assumed temporary command of VI Corps (Shenandoah), succeeding Major-General Horatio Gouverneur Wright.

October 19 1864: Brigadier-General George Washington Getty assumed interim command of VI Corps (Shenandoah), succeeding Brigadier-General James Brewerton Ricketts. Major-General Horatio Gouverneur Wright assumed command of VI Corps (Shenandoah), succeeding Brigadier-General George Washington Getty.

December 6 1864: VI Corps (Shenandoah) transferred from the Army of the Shenandoah to the Army of the Potomac.

Cavalry Corps Shenandoah

(Established, August 7 1864-March 25 1865, discontinued, to Sheridan’s Cavalry Command)

Alfred Thomas Archimedes Torbert (August 7 1864-January 26 1865), Wesley Merritt (January 26 1865-March 25 1865)

August 7 1864: Cavalry Corps was established in the Army of the Shenandoah. Brigadier-General Alfred Thomas Archimedes Torbert was appointed to command Cavalry Corps (Shenandoah), arriving on August 10th 1864.

August 10 1864: Brigadier-General Alfred Thomas Archimedes Torbert arrived to command Cavalry Corps (Shenandoah).

January 26 1865: Brigadier-General Wesley Merritt assumed command of Cavalry Corps (Shenandoah), succeeding Brigadier-General Alfred Thomas Archimedes Torbert.

March 25 1865: Cavalry Corps (Shenandoah) was discontinued, and is forces incorporated into Sheridan’s Cavalry Command.

XIX Corps Shenandoah

(Transferred from Army of the Gulf, November 7 1864-March 20 1865, discontinued)

Cuvier Grover (November 7 1864-December 28 1864), William Hemsley Emory (December 28 1864-March 20 1865)

November 7 1864: XIX Corps (Shenandoah) was established in the Army of the Shenandoah. Brigadier-General Cuvier Grover was appointed to command XIX Corps (Shenandoah), arriving on 11th November 1864.The elements of 1st Division and 2nd Division known as ‘Detachment XIX Corps (Gulf)’ were designated XIX Corps (Shenandoah). The 3rd Division remained in Louisiana with the interim title XIX Corps (Gulf).

November 11 1864: Brigadier-General Cuvier Grover arrived to command XIX Corps (Shenandoah).

December 28 1864: Brigadier-General William Hemsley Emory assumed command of XIX Corps (Shenandoah), succeeding Brigadier-General Cuvier Grover.

March 20 1865: XIX Corps (Shenandoah) was discontinued.

VIII Corps Middle

(Transferred from Middle Department, May 17 1865-June 27 1865, transferred to Military Division of the Atlantic)

Lewis Wallace (May 17 1865-June 27 1865)

May 17 1865: VIII Corps (Middle) transferred from the Middle Department to the direct command of the Middle Military Division. Major-General Lewis Wallace retained command of VIII Corps Middle.

June 27 1865: VIII Corps (Middle) transferred from the Middle Military Division to the Military Division of the Atlantic.

Department of Virginia

(Established, from Department of Virginia and North Carolina, January 18 1865-April 19 1865, transferred to Military Division of the James)

Edward Otho Cresap Ord (January 18 1865-April 19 1865)

January 18 1865: The Department of Virginia was established, comprising the territory within 60 miles of Fort Monroe, Northampton and Accomac counties, Virginia south of the Rappahannock River and east of the Fredericksburg–Richmond–Petersburg–Weldon Railroad. Major-General Edward Otho Cresap Ord was appointed to command the Department of Virginia, arriving on 22nd January 1865. The District of Eastern Virginia transferred from the Department of Virginia and North Carolina to the Department of Virginia. The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia and North Carolina to the Department of Virginia. The Sub-District of New Bern transferred from the Department of Virginia and North Carolina to the Department of Virginia. The Army of the James transferred interim from the Department of Virginia and North Carolina to the Department of Virginia. Terry’s Provisional Corps transferred interim from the Department of Virginia and North Carolina to the Department of Virginia.

January 22 1865: Major-General Edward Otho Cresap Ord arrived to command the Department of Virginia.

January 31 1865: The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia to the District of North Carolina. Terry’s Provisional Corps transferred from the Department of Virginia to the Department of North Carolina. The District of Virginia was established in the Department of Virginia. The Sub-District of New Bern was discontinued, and its territory transferred to the District of North Carolina. The Army of the James transferred officially to the Department of Virginia. Terry’s Provisional Corps (Virginia) transferred to the Department of North Carolina.

March 25 1865: The District of Lynchburg was established in the Department of Virginia. It comprised the counties of Nelson, Amherst, Bedford, Campbell, Appomattox, Pittsylvania, Henry and Patrick counties of Virginia.

April 13 1865: The District of the Peninsula was established in the Department of Virginia. It comprised the territory between the York and James Rivers.

April 16 1865: Major-General Henry Wager Halleck was appointed to command the Department of Virginia but did not arrive to take command. Major-General Edward Otho Cresap Ord retained command of the Department of Virginia.

April 19 1865: The Department of Virginia transferred to the Military Division of the James. The District of Virginia transferred with the Department of Virginia to the Military Division of the James. The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the James. The District of the Peninsula transferred with the Department of Virginia to the Military Division of the James. The District of Beaufort North Carolina transferred with the Department of Virginia to the Military Division of the James. The District of Lynchburg transferred with the Department of Virginia to the Military Division of the James. The Army of the James transferred with the Department of Virginia to the Military Division of the James.

District of Eastern Virginia

(Transferred from Department of Virginia and North Carolina, January 18 1865-April 19 1865, transferred to Military Division of the James)

George Foster Shepley (January 18 1865-February 11 1865), George Henry Gordon (February 11 1865-April 19 1865)

January 18 1865: The District of Eastern Virginia transferred from the Department of Virginia and North Carolina to the Department of Virginia. Brigadier-General George Foster Shepley retained command of the District of Eastern Virginia.

February 11 1865: Brigadier-General George Henry Gordon assumed command of the District of Eastern Virginia, succeeding Brigadier-General George Foster Shepley.

April 19 1865: The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the James.

Sub-District of Beaufort North Carolina

(Transferred from Department of Virginia and North Carolina, January 18 1865-January 31 1865, transferred to Department of North Carolina)

James Stewart (January 18 1865-January 31 1865)

January 18 1865: The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia and North Carolina to the Department of Virginia. Colonel James Stewart retained command of the Sub-District of Beaufort (North Carolina).

January 31 1865: The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia to the District of North Carolina.

Sub-District of New Bern

(Transferred from Department of Virginia and North Carolina, January 18 1865-January 31 1865, discontinued, to District of North Carolina)

Edward Harland (January 18 1865-January 31 1865)

January 18 1865: The Sub-District of New Bern transferred from the Department of Virginia and North Carolina to the Department of Virginia. Brigadier-General Edward Harland retained command of the Sub-District of New Bern.

January 31 1865: The Sub-District of New Bern was discontinued, and its territory transferred to the District of North Carolina.

District of Virginia

(Established, January 31 1865-April 19 1865, transferred to Military Division of the James)

Edward Otho Cresap Ord (January 31 1865-April 19 1865)

January 31 1865: The District of Virginia was established in the Department of Virginia. Major-General Edward Otho Cresap Ord assumed command of the District of Virginia.

April 19 1865: The District of Virginia transferred with the Department of Virginia to the Military Division of the James.

District of Lynchburg

(Established, March 25 1865-April 19 1865, transferred to Military Division of the James)

John Irvin Gregg (March 25 1865-April 19 1865)

March 25 1865: The District of Lynchburg was established in the Department of Virginia. It comprised the counties of Nelson, Amherst, Bedford, Campbell, Appomattox, Pittsylvania, Henry and Patrick counties of Virginia. Colonel John Irvin Gregg assumed command of the District of Lynchburg.

April 19 1865: The District of Lynchburg transferred with the Department of Virginia to the Military Division of the James.

District of the Peninsula

(Established, April 13 1865-April 19 1865, transferred to Military Division of the James)

Benjamin Chambers Ludlow (April 13 1865-April 19 1865)

April 13 1865: The District of the Peninsula was established in the Department of Virginia. It comprised the territory between the York and James Rivers. Lieutenant-Colonel Benjamin Chambers Ludlow assumed command of the District of the Peninsula.

April 19 1865: The District of the Peninsula transferred with the Department of Virginia to the Military Division of the James.

Army of the James

(Transferred from Department of Virginia and North Carolina, January 18 1865-April 19 1865, transferred to Military Division of the James)

Edward Otho Cresap Ord (January 18 1865-April 19 1865)

January 18 1865: The Army of the James transferred interim from the Department of Virginia and North Carolina to the Department of Virginia. Major-General Edward Otho Cresap Ord retained command of the Army of the James. XXIV Corps (James) transferred with the Army of the James from the Department of Virginia and North Carolina to the Department of Virginia. XXV Corps (James) transferred with the Army of the James from the Department of Virginia and North Carolina to the Department of Virginia.

January 31 1865: The Army of the James transferred officially to the Department of Virginia. Major-General Edward Otho Cresap Ord retained command of the Army of the James.

March 26 1865: The cavalry of the Army of the James transferred to Sheridan’s Cavalry Command (Potomac).

April 19 1865: The Army of the James transferred with the Department of Virginia to the Military Division of the James. XXIV Corps (James) transferred with the Army of the James to the Military Division of the James. XXV Corps (James) transferred with the Army of the James to the Military Division of the James.

XXIV Corps James

(Transferred from Department of Virginia and North Carolina, January 18 1865-April 19 1865, transferred to Military Division of the James)

John Gibbon (January 18 1865-April 19 1865)

January 18 1865: XXIV Corps (James) transferred with the Army of the James from the Department of Virginia and North Carolina to the Department of Virginia. Major-General John Gibbon retained command of XXIV Corps (James).

April 19 1865: XXIV Corps (James) transferred with the Army of the James to the Military Division of the James.

XXV Corps James

(Transferred from Department of Virginia and North Carolina, January 18 1865-April 19 1865, transferred to Military Division of the James)

Charles Adam Heckman (January 18 1865-February 2 1865), Godfrey Weitzel (February 2 1865-April 19 1865)

January 18 1865: XXV Corps (James) transferred with the Army of the James from the Department of Virginia and North Carolina to the Department of Virginia. Brigadier-General Charles Adam Heckman retained command of XXV Corps (James).

February 2 1865: Major-General Godfrey Weitzel assumed command of XXV Corps (James), succeeding Brigadier-General Charles Adam Heckman.

April 19 1865: XXV Corps (James) transferred with the Army of the James to the Military Division of the James.

 

Terry’s Provisional Corps Virginia

(Transferred from Department of Virginia, January 18 1865-January 31 1865, transferred to Department of North Carolina)

Alfred Howe Terry (January 18 1865-January 31 1865)

January 18 1865: Terry’s Provisional Corps transferred interim from the Department of Virginia and North Carolina to the Department of Virginia. Major-General Alfred Howe Terry retained command of Terry’s Provisional Corps.

January 31 1865: Terry’s Provisional Corps transferred from the Department of Virginia to the Department of North Carolina.

Military Division of the James

(Established, April 19 1865-June 27 1865, discontinued, to Military Division of the Atlantic)

Henry Wager Halleck (April 19 1865-June 27 1865)

April 19 1865: The Military Division of the James was established to comprise the Department of Virginia and the Department of the Potomac. Major-General Henry Wager Halleck assumed command of the Military Division of the James. The Department of the Potomac transferred to the Military Division of the James. The Department of Virginia transferred to the Military Division of the James. The parts of North Carolina not occupied by the armies of the Military Division of the Mississippi transferred from the Department of North Carolina to the Military Division of the James. The District of Virginia transferred with the Department of Virginia to the Military Division of the James. The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the James. The District of the Peninsula transferred with the Department of Virginia to the Military Division of the James. The District of Lynchburg transferred with the Department of Virginia to the Military Division of the James. The Army of the James transferred with the Department of Virginia to the Military Division of the James. The Army of the Potomac transferred with the Department of the Potomac to the Military Division of the James. Sheridan’s Cavalry Command (Potomac) transferred with the Department of the Potomac to the Military Division of the James.

May 6 1865: Sheridan’s Cavalry Command (James) was discontinued.

June 27 1865: The Military Division of the James was discontinued. The Department of the Potomac was discontinued. The Department of Virginia transferred from the Military Division of the James to the Military Division of the Atlantic. The Army of the James transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Lynchburg transferred with the Department of Virginia to the Military Division of the Atlantic. The Army of the James transferred to the Military Division of the Atlantic.

Department of Virginia

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

Edward Otho Cresap Ord (April 19 1865-May 13 1865), Alfred Howe Terry (temporary May 13 1865-June 14 1865, June 14 1865June 27 1865)

April 19 1865: The Department of Virginia transferred to the Military Division of the James. Major-General Henry Wager Halleck’s appointment to command the Department of Virginia was revoked before he assumed command. Major-General Edward Otho Cresap Ord retained command of the Department of Virginia. The District of Virginia transferred with the Department of Virginia to the Military Division of the James. The District of the Peninsula transferred with the Department of Virginia to the Military Division of the James. The District of Lynchburg transferred with the Department of Virginia to the Military Division of the James. The Army of the James transferred with the Department of Virginia to the Military Division of the James.

April 27 1865: The District of the Peninsula was discontinued, and its territory transferred to the Sub-District of the Peninsula in the District of Eastern Virginia.

May 13 1865: Major-General Alfred Howe Terry assumed interim temporary command of the Department of Virginia, succeeding Major-General Edward Otho Cresap Ord.

May 21 1865: The District of Fort Monroe was established in the Department of Virginia.

May 22 1865: The District of the Nottoway was established in the Department of Virginia.

May 25 1865: The District of Henrico was established in the Department of Virginia. The Sub-District of Blackwater was established in the District of the Nottoway in the Department of Virginia. The Sub-District of Roanoke was established in the District of the Nottoway. The Sub-District of the Appomattox was established in the District of the Nottoway in the Department of Virginia. The Sub-District of the Peninsula transferred from the District of Eastern Virginia to the District of Fort Monroe. The Sub-District of the Rappahannock was established in the Department of Virginia. The Sub-District of the South Anna was established in the Department of Virginia.

June 14 1865: Brigadier-General Alfred Howe Terry assumed full command of the Department of Virginia.

June 27 1865: The Department of Virginia transferred from the Military Division of the James to the Military Division of the Atlantic. The District of Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. The Army of the James transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Henrico transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Fort Monroe transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Lynchburg transferred with the Department of Virginia to the Military Division of the Atlantic. The District of the Nottoway transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of the Rappahannock transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of the South Anna transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic.

District of Virginia

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

Edward Otho Cresap Ord (April 19 1865-June 27 1865)

April 19 1865: The District of Virginia transferred with the Department of Virginia to the Military Division of the James. Major-General Edward Otho Cresap Ord retained command of the District of Virginia.

June 27 1865: The District of Virginia transferred with the Department of Virginia to the Military Division of the Atlantic.

District of Eastern Virginia

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

George Henry Gordon (April 19 1865-June 27 1865)

April 19 1865: The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the James. Brigadier-General George Henry Gordon retained command of the District of Eastern Virginia.

April 27 1865: The District of the Peninsula was discontinued. The Sub-District of the Peninsula was established in the District of Eastern Virginia.

May 25 1865: The Sub-District of the Peninsula transferred from the District of Eastern Virginia to the District of Fort Monroe.

June 27 1865: The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the Atlantic.

Sub-District of the Peninsula

(Established, from District of the Peninsula, April 27 1865-June 27 1865, transferred to Military Division of the Atlantic)

Benjamin Chambers Ludlow (April 27 1865-June 27 1865)

April 27 1865: The District of the Peninsula was discontinued, and renamed the Sub-District of the Peninsula in the District of Eastern Virginia. The Sub-District of the peninsula was established in the District of Eastern Virginia. It was bounded in the north by the York and Pamunkey Rivers, in the east by the Chesapeake Bay, in the south by the James River and in the west by the Richmond, Fredericksburg & Potomac Railroad. The Sub-District of the Peninsula was established in the District of Eastern Virginia. Colonel Benjamin Chambers Ludlow retained command of the Sub-District of the Peninsula.

May 25 1865: The Sub-District of the Peninsula transferred to the District of Fort Monroe.

District of Lynchburg

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

John Irvin Gregg (April 19 1865-June 27 1865)

April 19 1865: The District of Lynchburg transferred with the Department of Virginia to the Military Division of the James. Colonel John Irvin Gregg retained command of the District of Lynchburg.

June 27 1865: The District of Lynchburg transferred with the Department of Virginia to the Military Division of the Atlantic.

District of the Peninsula

(Transferred to Military Division of the James, April 19 1865-April 27 1865, discontinued, to Sub-District of the Peninsula) Benjamin Chambers Ludlow (April 19 1865-April 27 1865)

April 19 1865: The District of the Peninsula transferred with the Department of Virginia to the Military Division of the James. Lieutenant-Colonel Benjamin Chambers Ludlow retained command of the District of the Peninsula.

April 27 1865: The District of the Peninsula was discontinued, and renamed the Sub-District of the Peninsula in the District of Eastern Virginia.

District of Fort Monroe

(Established, May 21 1865-June 27 1865, transferred to Military Division of the Atlantic)

Nelson Appleton Miles (May 21 1865-June 27 1865)

May 21 1865: The District of Fort Monroe was established in the Department of Virginia. It comprised Fort Monroe and the counties of Accomac and Northampton. Brigadier-General Nelson Appleton Miles assumed command of the District of Fort Monroe.

May 25 1865: The Sub-District of the Peninsula transferred from the District of Eastern Virginia to the District of Fort Monroe. It was redefined to include the counties of Mathews, Gloucester, New Kent, King William, Charles City, James City, York, Warwick and Elizabeth City in Virginia, except for Fort Monroe.

June 27 1865: The District of Fort Monroe transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic.

Sub-District of the Peninsula

(Transferred from District of Eastern Virginia, May 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Benjamin Chambers Ludlow (May 25 1865-June 27 1865)

May 25 1865: The Sub-District of the Peninsula transferred from the District of Eastern Virginia to the District of Fort Monroe. It was redefined to include the counties of Mathews, Gloucester, New Kent, King William, Charles City, James City, York, Warwick and Elizabeth City in Virginia, except for Fort Monroe. Colonel Benjamin Chambers Ludlow retained command of the Sub-District of the Peninsula.

June 27 1865: The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic.

District of the Nottoway

(Established, May 22 1865-June 27 1865, transferred to Military Division of the Atlantic)

George Lucas Hartsuff (May 22 1865-June 27 1865)

May 22 1865: The District of the Nottoway was established in the Department of Virginia. It comprised the counties south of Petersburg. Major-General George Lucas Hartsuff assumed command of the District of the Nottoway.

May 25 1865: The Sub-District of Blackwater was established in the District of the Nottoway in the Department of Virginia. It comprised the counties of Sussex, Surrey, Greenville, Brunswick, Dinwiddie and Price George in Virginia. The Sub-District of Roanoke was established in the District of the Nottoway. It comprised the counties of Mecklenburg, Lunenburg, Prince Edward, Nottoway, Charlotte and Halifax in Virginia. The Sub-District of the Appomattox was established in the District of Nottoway in the Department of Virginia. It comprised the counties of Chesterfield, Amelia, Powhatan, Cumberland and Buckingham in Virginia.

June 27 1865: The District of the Nottoway transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of Blackwater transferred with the District of the Nottoway to the Military Division of the Atlantic. The Sub-District of Roanoke transferred with the District of the Nottoway to the Military Division of the Atlantic. The Sub-District of the Appomattox transferred with the District of the Nottoway to the Military Division of the Atlantic.

Sub-District of Blackwater

(Established, May 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Gilbert Hunt McKibbin (May 25 1865-June 27 1865)

May 25 1865: The Sub-District of Blackwater was established and transferred to the District of the Nottoway in the Department of Virginia. It comprised the counties of Sussex, Surrey, Greenville, Brunswick, Dinwiddie and Price George in Virginia. Captain Gilbert Hunt McKibbin assumed command of the Sub-District of Blackwater.

Jun e27 1865: The Sub-District of Blackwater transferred with the District of the Nottoway to the Military Division of the Atlantic.

Sub-District of Roanoke

(Established, May 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Edward Ferrero (May 25 1865-June 27 1865)

May 25 1865: The Sub-District of Roanoke was established in the District of the Nottoway. It comprised the counties of Mecklenburg, Lunenburg, Prince Edward, Nottoway, Charlotte and Halifax in Virginia. Brigadier-General Edward Ferrero assumed command of the Sub-District of Roanoke.

June 27 1865: The Sub-District of Roanoke transferred with the District of the Nottoway to the Military Division of the Atlantic.

Sub-District of the Appomattox

(Established, May 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Charles Henry Smith (May 25 1865-June 27 1865)

May 25 1865: The Sub-District of the Appomattox was established and transferred to the District of Nottoway in the Department of Virginia. It comprised the counties of Chesterfield, Amelia, Powhatan, Cumberland and Buckingham in Virginia. Colonel Charles Henry Smith assumed command of the Sub-District of the Appomattox.

June 27 1865: The Sub-District of the Appomattox transferred with the District of the Nottoway to the Military Division of the Atlantic.

District of Henrico

(Established, May 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Marsena Rudolph Patrick (May 25 1865-June 9 1865), John Wesley Turner (June 9 1865-June 27 1865)

May 25 1865: The District of Henrico was established in the Department of Virginia, to comprise Henrico County, Virginia. Brigadier-General Marsena Rudolph Patrick assumed command of the District of Henrico.

June 9 1865: Brigadier-General John Wesley Turner assumed command of the District of Henrico, succeeding Major-General Marsena Rudolph Patrick.

June 27 1865: The District of Henrico transferred with the Department of Virginia to the Military Division of the Atlantic.

Sub-District of the Rappahannock

(Established, May 25-June 27 1865, transferred to Military Division of the Atlantic)

Edwin Vose Sumner Jr (May 25-June 27 1865)

May 25 1865: The Sub-District of the Rappahannock was established in the Department of Virginia. It comprised the counties of Middlesex, King and Queen, Essex, Caroline, Spotsylvania and Orange in Virginia. Colonel Edwin Vose Sumner Jr assumed command of the Sub-District of the Rappahannock.

June 27 1865: The Sub-District of the Rappahannock transferred with the Department of Virginia to the Military Division of the Atlantic.

Sub-District of the South Anna

(Established, May 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Alvin Coe Voris (May 25-June 27 1865)

May 25 1865: The Sub-District of the South Anna was established in the Department of Virginia. It comprised the counties of Hanover, Louisa, Albemarle, Goochland, Fluvanna, and Greene in Virginia. Lieutenant-Colonel Alvin Coe Voris assumed command of the Sub-District of the South Anna.

June 27 1865: The Sub-District of the South Anna transferred with the Department of Virginia to the Military Division of the Atlantic.

Army of the James

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

Edward Otho Cresap Ord (April 19 1865-June 27 1865)

April 19 1865: The Army of the James transferred with the Department of Virginia to the Military Division of the James. XXIV Corps (James) transferred with the Army of the James to the Military Division of the James. XXV Corps (James) transferred with the Army of the James to the Military Division of the James. Major-General Edward Otho Cresap Ord retained command of the Army of the James.

May 23 1865: XXV Corps (James) transferred from the Army of the James to the Military Division of the Southwest.

June 27 1865: The Army of the James transferred with the Department of Virginia to the Military Division of the Atlantic. XXIV Corps (James) transferred with the Army of the James to the Military Division of the Atlantic.

XXIV Corps James

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

John Gibbon (April 19 1865-April 27 1865), John Wesley Turner (April 27 1865-May 17 1865), John Gibbon (May 17 1865-June 27 1865)

April 19 1865: XXIV Corps (James) transferred with the Army of the James to the Military Division of the James. Major-General John Gibbon retained command of XXIV Corps (James).

April 27 1865: Brigadier-General John Wesley Turner assumed temporary command of XXIV Corps (James), succeeding Major-General John Gibbon.

May 17 1865: Major-General John Gibbon assumed command of XXIV Corps (James), succeeding Brigadier-General John Wesley Turner.

June 2871865: XXIV Corps (James) transferred with the Army of the James to the Military Division of the Atlantic.

XXV Corps James

(Transferred to Military Division of the James, April 19 1865-May 23 1865, transferred to Military Division of the Southwest)

Godfrey Weitzel (April 19 1865-May 23 1865)

April 19 1865: XXV Corps (James) transferred with the Army of the James to the Military Division of the James. Major-General Godfrey Weitzel retained command of XXV Corps (James).

May 23 1865: XXV Corps (James) transferred from the Army of the James to the Military Division of the Southwest.

Department of the Potomac

(Transferred to Military Division of the James, April 19 1865-June 27 1865, discontinued, to Military Division of the Atlantic)

George Gordon Meade (April 19 1865-June 27 1865)

April 19 1865: The Department of the Potomac transferred to the Military Division of the James. Major-General George Gordon Meade retained command of the Department of the Potomac. The Army of the Potomac transferred with the Department of the Potomac to the Military Division of the James. Sheridan’s Cavalry Command (Potomac) transferred with the Department of the Potomac to the Military Division of the James.

May 6 1865: Sheridan’s Cavalry Command (Potomac) was discontinued.

June 27 1865: The Department of the Potomac was discontinued, and its territory incorporated into the Middle Department. The Army of the Potomac transferred from the Department of the Potomac to the Military Division of the Atlantic.

Army of the Potomac

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

George Gordon Meade (April 19 1865-June 27 1865)

April 19 1865: The Army of the Potomac transferred with the Department of the Potomac to the Military Division of the James. Major-General George Gordon Meade retained command of the Army of the Potomac. II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. IX Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James.

May 6 1865: Cavalry Corps (Potomac) transferred from Sheridan’s Cavalry Command to the Army of the Potomac.

June 27 1865: The Army of the Potomac transferred from the Department of the Potomac to the Military Division of the Atlantic. Cavalry Corps (Potomac) was discontinued. II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic. V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic. VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic.

II Corps Potomac

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

Francis Channing Barlow (temporary April 19 1865-May 5 1865), Andrew Atkinson Humphreys (May 5 1865-June 9 1865), Gershom Mott (temporary June 9 1865-June 20 1865), Andrew Atkinson Humphreys (June 20 1865-June 27 1865)

April 19 1865: II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. Brigadier-General Francis Channing Barlow retained temporary command of II Corps (Potomac).

May 5 1865: Major-General Andrew Atkinson Humphreys assumed command of II Corps (Potomac), succeeding Brigadier-General Francis Channing Barlow.

June 9 1865: Major-General Gershom Mott assumed temporary command of II Corps (Potomac), succeeding Major-General Andrew Atkinson Humphreys.

June 20 1865: Major-General Andrew Atkinson Humphreys assumed command of II Corps (Potomac), succeeding Major-General Gershom Mott.

June 27 1865: II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic.

V Corps Potomac

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

Charles Griffin (April 19 1865-June 27 1865)

April 19 1865: V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. Major-General Charles Griffin retained command of V Corps (Potomac).

June 27 1865: V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic.

VI Corps Potomac

(Transferred to Military Division of the James, April 19 1865-June 27 1865, transferred to Military Division of the Atlantic)

Horatio Gouverneur Wright (April 19 1865-June 27 1865)

April 19 1865: VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. Major-General Horatio Gouverneur Wright retained command of VI Corps (Potomac).

June 27 1865: VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic.

IX Corps Potomac

(Transferred to Military Division of the James, April 19 1865-April 24 1865, transferred to Department of Washington)

John Grubb Parke (April 19 1865-April 24 1865)

April 19 1865: IX Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. Major-General John Grubb Parke retained command of IX Corps (Potomac).

April 24 1865: IX Corps (Potomac) transferred from the Army of the Potomac to the Department of Washington.

Cavalry Corps Potomac

(Transferred from Sheridan’s Cavalry Command (Potomac), May 6 1865-June 27 1865, discontinued)

Wesley Merritt (May 6 1865-May 22 1865), George Crook (May 22 1865-June 1 1865), William Wells (June 1 1865-June 27 1865)

May 6 1865: Cavalry Corps (Potomac) transferred from Sheridan’s Cavalry Command (Potomac) to the Army of the Potomac. Major-General Wesley Merritt retained command of Cavalry Corps (Potomac).

May 22 1865: Major-General George Crook assumed command of Cavalry Corps (Potomac), succeeding Major-General Wesley Merritt.

June 1 1865: Brigadier-General William Wells assumed command of Cavalry Corps (Potomac), succeeding Major-General George Crook.

June 27 1865: Cavalry Corps (Potomac) was discontinued.

Sheridan’s Cavalry Command James

(Transferred to Military Division of the James, April 19 1865-May 6 1865, discontinued, to Cavalry Corps (Potomac)

Philip Henry Sheridan (April 19 1865-May 6 1865)

April 19 1865: Sheridan’s Cavalry Command (Potomac) transferred with the Department of the Potomac to the Military Division of the James. Cavalry Corps (Potomac) transferred with Sheridan’s Cavalry Command (Potomac) to the Military Division of the James. Major-General Philip Henry Sheridan retained command of Sheridan’s Cavalry Command (Potomac).

May 6 1865: Sheridan’s Cavalry Command (James) was discontinued.

Cavalry Corps James

(Transferred to Military Division of the James, April 19 1865-May 6 1865, transferred to Army of the Potomac)

Wesley Merritt (April 19 1865-May 6 1865)

April 19 1865: Cavalry Corps (Potomac) transferred with Sheridan’s Cavalry Command (Potomac) to the Military Division of the James. Brigadier-General Wesley Merritt retained command of Cavalry Corps (Potomac).

May 6 1865: Cavalry Corps (James) transferred from Sheridan’s Cavalry Command (Potomac) to the Army of the Potomac.

Part 3g: Western Theatre

Summary

This theatre broadly covers the states of Illinois, Indiana, Ohio, Kentucky, Tennessee, Mississippi and adjacent operational regions in Alabama, Georgia, South Carolina, and North Carolina.

This was the decisive theatre of operations where the foundations of Union victory were established. Being geographically central, operations in this theatre inevitably impinged on and overlapped with all the other theatres of war. The military organisation therefore experienced a complex evolution as attention was frequently diverted to diverging and tangential operations. Nevertheless, the main focus remained on two main lines of advance by the Union Army, both assisted by naval forces on the inland rivers. The first followed the line of the Mississippi southwards and the second, followed the line of the Tennessee River into northern Georgia during 1862 to 1864. Exploitation of the latter advance in late 1864 and 1865 took dominant Union forces from the western theatre across Georgia to the Atlantic Coast and then north through the Carolinas.

There first attempt to bring these extensive operations under a unified command was comparatively short-lived.  The Department (Military Division) of the Mississippi was created in March 1862 to command operations in states bordering the Mississippi, Tennessee, Cumberland and Ohio Rivers. The occupation of Missouri, Kentucky, and Western Tennessee was largely accomplished, although those areas remained under continual threat of raids and reconquest. This supreme command was dissolved into its constituent departments in September and October 1862 as the objectives of each region once again diverged.

Unified command was more fully achieved in October 1863 with the creation of the Military Division of the Mississippi. This development became possible after control of the Mississippi River was achieved during the summer and attention concentrated on the line of invasion along the Tennessee River and into Georgia, with operations in eastern Tennessee subordinated to it. The inexorable progress of the armies of the Military Division through Georgia in 1864, and into the Carolinas in 1865 during brought those regions, and their Departmental commands in the Atlantic Coast Theatre, within its sphere of operational control but not necessarily its administrative control.

The successful introduction of the Military Division of the Mississippi to coordinate more than one Department was extended to other major theatres. The Military Division of West Mississippi was formed in May 7 1864 and renamed the Military Division of the Southwest in May 1865. The Middle Military Division was formed in August 1864, and the Military Division of the Missouri in January 1865. A Military Division was not formed in Virginia as the General-in-Chief was already giving immediate unified command in that theatre. This level of command was retained and extended after the end of hostilities so that every part of the continent came under the control of one of five newly designated Military Divisions (the James later the Atlantic, the Pacific, the Gulf, the Mississippi, and the Tennessee).

Department of Kentucky

(Established, May 28 1861-August 15 1861, discontinued, to Department of the Cumberland)

Robert Anderson (May 28 1861-August 15 1861)

May 28 1861: The Department of Kentucky was established, comprising that territory of the state within 100 miles of the Ohio River, detached from the Department of the East. Brigadier-General Robert Anderson assumed command of the Department of Kentucky.

August 15 1861: The Department of Kentucky was discontinued, and most of its territory transferred to the Department of the Cumberland; Western Kentucky transferred from the Department of Kentucky to the Western Department.

Department of the Cumberland

(Established, from Department of Kentucky, August 15 1861-November 9 1861, discontinued, to Department of the Missouri and Department of the Ohio)

Robert Anderson (August 15 1861-October 6 1861 interim October 8 1861), William Tecumseh Sherman (October 6 1861-November 9 1861)

August 15 1861: The Department of the Cumberland was established, comprising the states of Tennessee and Kentucky except for the territory occupied by forces of the Western Department at the junction of Tennessee, Cumberland Ohio and Mississippi rivers. Brigadier-General Robert Anderson was appointed to command the Department of the Cumberland, arriving on 24th September 1861.

September 19 1861: The territory of Kentucky within 15 miles of Cincinnati transferred from the Department of the Cumberland to the Department of the Ohio.

September 24 1861: Brigadier-General Robert Anderson arrived to command the Department of the Cumberland.

October 6 1861: Brigadier-General William Tecumseh Sherman was appointed to command the Department of the Cumberland, arriving on 8th October 1861.

October 8 1861: Brigadier-General William Tecumseh Sherman arrived to command the Department of the Cumberland, succeeding Brigadier-General Robert Anderson.

November 9 1861: The Department of the Cumberland was discontinued, and its territory divided between the Department of the Missouri and the Department of the Ohio. Tennessee west of the Cumberland River transferred from the Department of the Cumberland to the Department of the Ohio.

Department of the Missouri

(Established, from the Western Department, November 9 1861-March 11 1862, transferred to Department (Military Division) of the Mississippi)

Henry Wager Halleck (November 9 1861-March 11 1862)

November 9 1861: The Department of the Missouri was established, comprising Missouri, Iowa, Minnesota, Wisconsin, Illinois and Arkansas from the Western Department, the Department of the East and Kentucky west of the Cumberland River from the Department of the Cumberland. Major-General Henry Wager Halleck was appointed to command the Department of the Missouri, arriving on 19th November 1861. The Department of the Cumberland was discontinued, and its territory divided between the Department of the Missouri and the Department of the Ohio. The District of Southeast Missouri transferred from the Western Department to the Department of the Missouri, comprising the vicinity of Cairo, Illinois, and Ironton, Jefferson City and Cape Girardeau, Missouri. The District of Western Kentucky transferred from the Western Department to the Department of the Missouri.

November 19 1861: Major-General Henry Wager Halleck arrived to command the Department of the Missouri.

November 21 1861: The District of St Louis was established in the Department of the Missouri

November 26 1861: The District of North Missouri was established in the Department of the Missouri.

December 3 1861: The District of Central Missouri was established in the Department of the Missouri. The Army of Western Missouri was established in the District of Central Missouri.

December 23 1861: The District of Cairo was established in the Department of the Missouri.

December 25 1861: The District of Southwest Missouri was established in the Department of the Missouri. The Army of the Southwest (“Army of Southwest Missouri”) was established in the District of Southwest Missouri.

January 31 1862: The District of Western Kentucky was discontinued.

February 6 1862: The region of Western Tennessee transferred from the Department of the Ohio to the Department of the Missouri.

February 14 1862: The District of West Tennessee was established in the Department of the Missouri.

February 23 1862: The Army of the Mississippi was officially announced for the proposed Department (Military Division) of the Mississippi, to be formally established on March 1st 1862. The District of the Mississippi was established in the Department of the Missouri.

February 27 1862: The Army of the Mississippi transferred to the District of the Mississippi.

March 11 1862: The Department of the Missouri transferred to the Department (Military Division) of the Mississippi. The District of Southeast Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The District of St Louis transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The District of Central Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The District of Southwest Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The Army of the Southwest (“Army of Southwest Missouri”) transferred with the District of Southwest Missouri to the Department (Military Division) of the Mississippi. The District of West Tennessee transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The Army of West Tennessee transferred from the District of West Tennessee to the Department (Military Division) of the Mississippi. The District of the Mississippi transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. Army of the Mississippi transferred from the District of the Mississippi to the Department (Military Division) of the Mississippi.

District of Southeast Missouri

(Transferred from Western Department, November 9 1861-March 11 1862, transferred to Department (Military Division of the Mississippi)

Ulysses Simpson Grant (November 9 1861-March 1 1862), Frederick Steele (March 1 1862-March 11 1862)

November 9 1861: The District of Southeast Missouri transferred from the Western Department to the Department of the Missouri, comprising the vicinity of Cairo, Illinois, and Ironton, Jefferson City and Cape Girardeau, Missouri. Brigadier-General Ulysses Simpson Grant retained command of the District of Southeast Missouri.

March 1 1862: Brigadier-General Frederick Steele assumed command of the District of Southeast Missouri, succeeding Major-General Ulysses Simpson Grant.

March 11 1862: The District of Southeast Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi.

District of Western Kentucky

(Transferred from Western Department, November 9 1861-January 31 1862, discontinued)

Charles Ferguson Smith (November 9 1861-November 17 1861), Horatio Gouverneur Wright (November 17 1861-January 31 1862)

November 9 1861: The District of Western Kentucky transferred from the Western Department to the Department of the Missouri. Brigadier-General Charles Ferguson Smith retained command of the District of Western Kentucky.

November 17 1861: Brigadier-General Horatio Gouverneur Wright assumed command of the District of Western Kentucky, succeeding Brigadier-General Charles Ferguson Smith.

January 31 1862: The District of Western Kentucky was discontinued.

District of St Louis

(Established, November 21 1861-March 11 1862, transferred to Department (Military Division of the Mississippi)

John McAllister Schofield (November 21 1861-March 11 1862)

November 21 1861: The District of St Louis was established in the Department of the Missouri, bounded by the Mississippi, Missouri and Meramec Rivers and the railroad line from Pacific to Rolla as far as Lindsey’s Station and a line drawn from the mouth of the Osage River just west of Jefferson City to the Meramec River. Brigadier-General John McAllister Schofield assumed command of the District of St Louis.

March 11 1862: The District of St Louis transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi.

District of North Missouri

(Established, November 26 1861-March 11 1862, discontinued, to District of Northwest Missouri)

Benjamin Mayberry Prentiss (November 26 1861-December 26 1861), John McAllister Schofield (December 26 1861-March 11 1862)

November 26 1861: The District of North Missouri was established in the Department of the Missouri, comprising the territory of the state north of the Missouri River. Brigadier-General Benjamin Mayberry Prentiss assumed command of the District of North Missouri.

December 26 1861: Brigadier-General John McAllister Schofield assumed command of the District of North Missouri, succeeding Brigadier-General Benjamin Mayberry Prentiss.

March 11 1862: The District of North Missouri was discontinued, and incorporated into the District of Northwest Missouri.

District of Central Missouri

(Established, December 3 1861-March 11 1862, transferred to Department (Military Division of the Mississippi)

John Pope (December 3 1861-February 12 1862), James Totten (February 12 1862-March 11 1862)

December 3 1861: The District of Central Missouri was established in the Department of the Missouri, comprising the region between the Missouri and Osage Rivers in Missouri. Brigadier-General John Pope assumed command of the District of Central Missouri. The Army of Western Missouri was established in the District of Central Missouri.

February 12 1862: The Army of Western Missouri was discontinued. Lieutenant-Colonel James Totten assumed command of the District of Central Missouri, succeeding Brigadier-General John Pope.

March 11 1862: The District of Central Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi.

Army of Western Missouri

(Established, December 3 1861-February 12 1862, discontinued, to Army of the Mississippi)

John Pope (December 3 1861-February 12 1862)

December 3 1861: The Army of Western Missouri was established in the District of Central Missouri. Brigadier-General John Pope assumed command of the Army of Western Missouri.

February 12 1862 The Army of Western Missouri was discontinued, and later incorporated into the Army of the Mississippi.

District of Cairo

(Established, December 23 1861-March 11 1862, discontinued)

Ulysses Simpson Grant (December 23 1861-February 14 1862), William Tecumseh Sherman (February 14 1862-March 11 1862)

December 23 1861: The District of Cairo was established in the Department of the Missouri, comprising the vicinity of Cairo, Illinois. Brigadier-General Ulysses Simpson Grant assumed command of the District of Cairo.

February 14 1862: Brigadier-General William Tecumseh Sherman assumed command of the District of Cairo, succeeding Brigadier-General Ulysses Simpson Grant.

March 11 1862: The District of Cairo was discontinued.

District of Southwest Missouri

(Established, December 25 1861-March 11 1862, transferred to Department (Military Division of the Mississippi)

Samuel Ryan Curtis (December 25 1861-March 11 1862)

December 25 1861: The District of Southwest Missouri was established in the Department of the Missouri, comprising the state of Missouri south of the Osage River and west of the Meramec River. Brigadier-General Samuel Ryan Curtis assumed command of the District of Southwest Missouri. The Army of the Southwest (“Army of Southwest Missouri”) was established in the District of Southwest Missouri.

March 11 1862: The District of Southwest Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The Army of the Southwest (“Army of Southwest Missouri”) transferred with the District of Southwest Missouri to the Department (Military Division) of the Mississippi.

Army of the Southwest

(Established, December 25 1861-March 11 1862, transferred to Department (Military Division of the Mississippi)

Samuel Ryan Curtis (December 25 1861-March 11 1862)

December 25 1861: The Army of the Southwest (“Army of Southwest Missouri”) was established in the District of Southwest Missouri. Brigadier-General Samuel Ryan Curtis assumed command of the Army of the Southwest.

March 11 1862: The Army of the Southwest (“Army of Southwest Missouri”) transferred with the District of Southwest Missouri to the Department (Military Division) of the Mississippi.

District of West Tennessee

(Established, February 14 1862-March 11 1862, transferred to Department (Military Division of the Mississippi)

Ulysses Simpson Grant (February 14 1862-March 11 1862)

February 14 1862: The District of West Tennessee was established in the Department of the Missouri, comprising the territory around Fort Donelson, Tennessee, and locations occupied by the Army of West Tennessee. Brigadier-General Ulysses Simpson Grant was appointed to command the District of West Tennessee, arriving on 17th February 1862.

February 17 1862: Brigadier-General Ulysses Simpson Grant arrived to command the District of West Tennessee.

February 21 1862: The Army of West Tennessee was established in the District of West Tennessee.

March 11 1862: The District of West Tennessee transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The Army of West Tennessee transferred from the District of West Tennessee to the Department (Military Division) of the Mississippi.

Army of West Tennessee

(Established, February 21 1862-March 11 1862, transferred to Department (Military Division) of the Mississippi)

Ulysses Simpson Grant (February 21 1862-March 11 1862)

February 21 1862: The Army of West Tennessee was established in the District of West Tennessee. The Army was usually but incorrectly referred to as the “Army of the Tennessee”. Major-General Ulysses Simpson Grant assumed command of the Army of West Tennessee (“Army of the Tennessee”).

March 11 1862: The Army of West Tennessee transferred from the District of West Tennessee to the Department (Military Division) of the Mississippi.

District of the Mississippi

(Established, February 27 1862-March 11 1862, transferred to Department (Military Division of the Mississippi)

John Pope (February 27 1862-March 11 1862)

February 27 1862: The District of the Mississippi was established in the Department of the Missouri, comprising the parts of Missouri between the Saint Francis River and the Mississippi River. Brigadier-General John Pope assumed command of the District of the Mississippi. The Army of the Mississippi transferred to the District of the Mississippi. Brigadier-General John Pope retained command of the Army of the Mississippi.

March 11 1862: The District of the Mississippi transferred with the District of the Mississippi to the Department (Military Division) of the Mississippi. The Army of the Mississippi transferred from the District of the Mississippi to the Department (Military Division) of the Mississippi.

Army of the Mississippi

(Transferred from Department of the Missouri, February 27 1862-March 11 1862, transferred to Department (Military Division) of the Mississippi)

John Pope (February 27 1862-March 11 1862)

February 27 1862: The Army of the Mississippi transferred to the District of the Mississippi. Brigadier-General John Pope retained command of the Army of the Mississippi.

March 11 1862: The Army of the Mississippi transferred from the District of the Mississippi to the Department (Military Division) of the Mississippi.

Army of the Mississippi

(Established, from Army of Western Missouri, February 23 1862-February 27 1862, transferred to District of the Mississippi)

John Pope (February 23 1862-February 27 1862)

February 23 1862: The Army of the Mississippi was officially announced for the proposed Department (Military Division) of the Mississippi, which would be formally established on March 1st 1862. It comprised the forces of the former Army of Western Missouri. Brigadier-General John Pope assumed command of the Army of the Mississippi.

February 27 1862: The Army of the Mississippi transferred to the District of the Mississippi.

Department of the Ohio

(Established, May 3 1861-March 11 1862, to Mountain Department)

George Brinton McClellan (May 3 1861-July 22 1861), William Starke Rosecrans (July 23 1861-September 20 1861), Ormsby McKnight Mitchel (September 21 1861-November 9 1861 interim November 14 1861), Don Carlos Buell (November 10 1861-March 11 1862)

May 3 1861: The Department of the Ohio was established, comprising Illinois, Ohio and Indiana transferred from the Department of the East. Ohio State Major-General George Brinton McClellan was appointed to command the Department of the Ohio, arriving on 13th May 1861.

May 8 1861: The parts of Pennsylvania and Virginia north of the Kanawha River, north and west of the Greenbrier River and thence on a line northwest to the southwest boundary of Maryland were transferred from the Department of the East to the Department of the Ohio.

May 9 1861: The Department of the Ohio was extended to include the parts of Pennsylvania and Virginia north of the Kanawha River and west of the Greenbrier River, and on a line drawn from the Greenbrier River to the southwest corner of Maryland, then to the Pennsylvania border and to the northeast corner of McKean county, Pennsylvania, to its existing territory of Illinois, Ohio and Indiana. These territories were detached from the Department of the East and the Department of Pennsylvania.

May 13 1861: Ohio State Major-General George Brinton McClellan arrived to command the Department of the Ohio.

June 6 1861: The state of Missouri transferred from the Department of the West to the Department of the Ohio.

June 14 1861: The Army of Occupation was established in western Virginia in the Department of the Ohio.

July 5 1861: The states of Missouri and Illinois were transferred from the Department of the Ohio to the Western Department.

July 23 1861: Brigadier-General William Starke Rosecrans assumed command of the Department of the Ohio, succeeding Major-General George Brinton McClellan.

July 24 1861: The Cheat Mountain District was established in the Department of the Ohio, comprising the vicinity of Cheat Mountain, Virginia.

July 25 1861: All the parts of Pennsylvania in the Department of the Ohio were transferred to the Department of Pennsylvania. The Cheat River District was established in the Department of the Ohio, comprising the territories of Tygart’s Valley and the Cheat River in Virginia.

August 3 1861: The District of Grafton was established in the Department of the Ohio, comprising the line of the Baltimore & Ohio Railroad from Cumberland, Maryland, to Wheeling, Virginia, and the Northwestern Virginia Railroad from Grafton to Parkersburg, Virginia.

September 4 1861: The Cheat River District was discontinued.

September 19 1861: The Department of the Ohio was reorganised to include Ohio, Indiana and the territory of Kentucky within 15 miles of Cincinnati, Ohio. The territory of Kentucky within 15 miles of Cincinnati transferred from the Department of the Cumberland to the Department of the Ohio. The states of Ohio and Indiana were transferred to the Department of the Ohio. The territory of Kentucky within 15 miles of Cincinnati transferred from the Department of the Cumberland to the Department of the Ohio. Brigadier-General Ormsby McKnight Mitchel was appointed to command the Department of the Ohio, arriving on 21st September 1861, to succeed Major-General William Starke Rosecrans. The Department of Western Virginia was established, comprising Virginia west of the Blue Ridge Mountains, with its territory was taken from the Department of the East and the Department of the Ohio. The Army of Occupation (Ohio) was discontinued. The Cheat Mountain District was discontinued.

September 21 1861: Brigadier-General Ormsby McKnight Mitchel assumed command of the Department of the Ohio, succeeding Major-General William Starke Rosecrans.

November 9 1861: The Army of the Ohio was established in the Department of the Ohio.

November 15 1861: Brigadier-General Don Carlos Buell arrived to command the Department of the Ohio. Brigadier-General Don Carlos Buell arrived to command the Army of the Ohio.

December 20 1861: The District of Grafton was discontinued, and its territory transferred to the Railroad District in the Department of Western Virginia.

February 6 1862: The region of Western Tennessee transferred from the Department of the Ohio to the Department of the Missouri.

March 11 1862: The Department of the Ohio was discontinued although the field army continued to be called the Army of the Ohio until 24th October 1862, operating under the authority of the Department (Military Division) of the Mississippi. The Army of the Ohio transferred from the Department of the Ohio to the Department (Military Division) of the Mississippi.

Cheat Mountain District

(Established, July 24 1861-September 19 1861, discontinued)

Joseph Jones Reynolds (July 24 1861-September 19 1861)

July 24 1861: The Cheat Mountain District was established in the Department of the Ohio, comprising the vicinity of Cheat Mountain, Virginia. Brigadier-General Joseph Jones Reynolds assumed command of the Cheat Mountain District.

September 19 1861: The Cheat Mountain District was discontinued.

Cheat River District

(Established, July 25 1861-September 4 1861, discontinued)

Charles John Biddle (July 25 1861-August 19 1861, Henry Washington Benham (August 20 1861-September 4 1861)

July 25 1861: The Cheat River District was established in the Department of the Ohio, comprising the territories of Tygart’s Valley and the Cheat River in Virginia. Colonel Charles John Biddle assumed command of the Cheat River District.

August 20 1861: Brigadier-General Henry Washington Benham assumed command of the Cheat River District, succeeding Colonel Charles John Biddle.

September 4 1861: The Cheat River District was discontinued.

District of Grafton

(Established, August 3 1861-December 20 1861, discontinued, to Railroad District)

Benjamin Franklin Kelley (August 3 1861-December 20 1861)

August 3 1861: The District of Grafton was established in the Department of the Ohio, comprising the line of the Baltimore & Ohio Railroad from Cumberland, Maryland, to Wheeling, Virginia, and the Northwestern Virginia Railroad from Grafton to Parkersburg, Virginia. Brigadier-General Benjamin Franklin Kelley assumed command of the District of Grafton.

Brigadier-General Benjamin Franklin Kelley assumed command of the District of Grafton.

December 20 1861: The District of Grafton was discontinued, and its territory transferred to the Railroad District in the Department of Western Virginia.

Army of Occupation

(Established, June 14 1861-September 19 1861, discontinued)

George Brinton McClellan (June 14 1861-July 22 1861), William Starke Rosecrans (July 23 1861-September 19 1861)

June 14 1861: The Army of Occupation was established in western Virginia in the Department of the Ohio. Major-General George Brinton McClellan assumed command of the Army of Occupation (Ohio).

July 23 1861: Brigadier-General William Starke Rosecrans assumed command of the Army of Occupation (Ohio), succeeding Major-General George Brinton McClellan.

September 19 1861: The Army of Occupation (Ohio) was discontinued.

Army of the Ohio

(Established, November 9 1861-March 11 1862, transferred to Department (Military Division) of the Mississippi)

Don Carlos Buell (November 9 1861-March 11 1862)

November 9 1861: The Army of the Ohio was established in the Department of the Ohio. Brigadier-General Don Carlos Buell was appointed to command the Army of the Ohio, arriving on 15th November 1861.

November 15 1861: Brigadier-General Don Carlos Buell arrived to command the Army of the Ohio

March 11 1862: The Army of the Ohio transferred to the Department (Military Division) of the Mississippi.

Department (Military Division) of the Mississippi

(Established, from Department of the Missouri and Department of Kansas, March 11 1862-September 19 1862, discontinued, to Department of the Missouri)

Henry Wager Halleck (March 11 1862-September 19 1862)

March 11 1862: The Department (Military Division) of the Mississippi was established, bringing unified command over the Department of the Missouri and the Department of Kansas. Headquarters were established at St Louis, Missouri. Its territory of authority covered Kansas, Nebraska Territory, Colorado Territory (except Fort Garland), Dakota Territory and the Indian Territory from the Department of Kansas; Wisconsin, Missouri, Illinois, western Kentucky, western Tennessee, Arkansas, Minnesota and Iowa from the Department of the Missouri; and western Michigan, Indiana and western Ohio from the Department of Ohio. The territorial command should normally have been designated a Military Division but as the senior officer of the Army, Major-General George Brinton McClellan, was commanding the Department of the Potomac, it was inappropriate to name the command of the second most senior officer, Major-General Henry Wager Halleck, at the higher level. Major-General Henry Wager Halleck assumed command of the Department (Military Division) of the Mississippi, arriving on 13th March 1862. The Department of the Missouri transferred to the Department (Military Division) of the Mississippi. The Department of Kansas transferred to the Department (Military Division) of the Mississippi. The District of Southeast Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The District of St Louis transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The District of Central Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The District of Southwest Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The Army of the Southwest (“Army of Southwest Missouri”) transferred with the District of Southwest Missouri to the Department (Military Division) of the Mississippi. The District of West Tennessee transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. The Army of West Tennessee transferred from the District of West Tennessee to the Department (Military Division) of the Mississippi. The District of the Mississippi transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. Army of the Mississippi transferred from the District of the Mississippi to the Department (Military Division) of the Mississippi.

March 12 1862: The District of Northeast Missouri was established in the Department of the Missouri. The District of Northwest Missouri was established in the Department of the Missouri.

March 13 1862: Major-General Henry Wager Halleck arrived to command the Department (Military Division) of the Mississippi.

March 19 1862: The District of Kansas was established in the Department (Military Division) of the Mississippi, comprising the discontinued Department of Kansas. The District of the Ohio was established in the Department (Military Division) of the Mississippi.

March 21 1862: The District of Cairo was established in the Department of the Missouri.

April 1 1862: The Sub-District of Columbus was established in the District of Cairo.

May 2 1862: The Department of Kansas was established and detached from the Department (Military Division) of the Mississippi, comprising Kansas, Dakota Territory, Nebraska Territory, Indian Territory and Colorado Territory (except for Fort Garland). The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri. The District of Kansas was discontinued.

May 11 1862: The District of Southeast Missouri was discontinued.

June 1 1862: The District of Central Missouri was discontinued, and incorporated into the District of Missouri. The District of Missouri was established in the Department of the Missouri.

June 4 1862: The District of St Louis was discontinued, and incorporated into the District of Missouri. The District of Northeast Missouri was discontinued, and incorporated into the District of Missouri.

June 8 1862: The territories of Eastern Kentucky and eastern Tennessee were transferred from the Mountain Department to the Department (Military Division) of the Mississippi.

June 16 1862: The District of the Mississippi was discontinued, and its territory transferred the District of West Tennessee.

June 21 1862: The Sub-District of Jackson was established in the District of West Tennessee,

June 26 1862: The Army of the Mississippi transferred from the Department (Military Division) of the Mississippi to the District of the West Tennessee.

June 30 1862: The Sub-District of Columbus was discontinued.

July 1 1862: The District of Corinth was established in the Department (Military Division) of the Mississippi.

July 11 1862: Major-General Henry Wager Halleck was appointed General-in-Chief of the United States Army, arriving on July 23 1862.

July 16 1862: The District of the Ohio transferred from the Department (Military Division) of the Mississippi to report directly to the War Department.

August 19 1862: The District of Cairo was discontinued.

September 6 1862: The Department of the Northwest was established, comprising the states of Wisconsin, Iowa and Minnesota, and Nebraska Territory and Dakota Territory. The states of Minnesota and Iowa were detached from the Department (Military Division) of the Mississippi. Wisconsin was taken from the Department of the Ohio. Dakota Territory and Nebraska Territory were transferred from the Department of Kansas to the Department of the Northwest.

September 19 1862: The Department (Military Division) of the Mississippi was discontinued. The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri. Kansas and the Indian Territory were transferred from the Department of Kansas to the Department of the Missouri. The Army of Kansas was discontinued. The Department of the Missouri was transferred from the Department (Military Division) of the Mississippi to the War Department. The District of Southwest Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri. The District of West Tennessee transferred directly to the War Department. The Sub-District of Jackson transferred with the District of West Tennessee to the War Department. The District of Corinth transferred from the Department (Military Division) of the Mississippi to the District of West Tennessee. The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri. The Army of West Tennessee transferred from the Department (Military Division) of the Mississippi to the District of West Tennessee. The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri. The Army of the Mississippi transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri.

Department of the Missouri

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-September 19 1862, transferred from the Department (Military Division) of the Mississippi, see Part 3c: Trans-Mississippi, Northwest and Frontier Theatre)

Henry Wager Halleck (March 11 1862-September 19 1862)

March 11 1862: The Department of the Missouri transferred to the Department (Military Division) of the Mississippi. Major-General Henry Wager Halleck retained command of the Department of the Missouri.

March 12 1862: The District of Northeast Missouri was established in the Department of the Missouri. The District of Northwest Missouri was established in the Department of the Missouri.

April 1 1862: The Sub-District of Columbus was established in the District of Cairo.

May 2 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri.

May 11 1862: The District of Southeast Missouri was discontinued.

June 1 1862: The District of Central Missouri was discontinued, and incorporated into the District of Missouri. The District of Missouri was established in the Department of the Missouri.

June 4 1862: The District of St Louis was discontinued, and incorporated into the District of Missouri. The District of Northeast Missouri was discontinued, and incorporated into the District of Missouri.

September 19 1862: The Department of the Missouri was transferred from the Department (Military Division) of the Mississippi to the War Department. The Department of the Missouri was reorganised to comprise Missouri and Arkansas; Kansas, and the Indian Territory transferred from the Department of Kansas; Alton, Illinois, from the Department of the Ohio and Kentucky and Tennessee west of the Tennessee River from the Department (Military Division) of the Mississippi. Alton, Illinois, transferred from the Department of the Ohio to the Department of the Missouri.

District of Southeast Missouri

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-May 2 1862, transferred to District of Southwest Missouri)

Frederick Steele (March 11 1862-May 2 1862)

March 11 1862: The District of Southeast Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. Brigadier-General Frederick Steele retained command of the District of Southeast Missouri.

May 2 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri.

District of St Louis

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-June 4 1862, discontinued, to District of Missouri)

John McAllister Schofield (March 11 1862-April 10 1862), Lewis Merrill (April 10 1862-June 4 1862)

March 11 1862: The District of St Louis transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. Brigadier-General John McAllister Schofield retained command of the District of St Louis.

April 10 1862: Colonel Lewis Merrill assumed command of the District of St Louis, succeeding Brigadier-General John McAllister Schofield.

June 4 1862: The District of St Louis was discontinued, and incorporated into the District of Missouri.

District of Central Missouri

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-June 1 1862, discontinued, to District of Missouri)

James Totten (March 11 1862-June 1 1862)

March 11 1862: The District of Central Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. State Brigadier-General James Totten retained command of the District of Central Missouri.

June 1 1862: The District of Central Missouri was discontinued, and incorporated into the District of Missouri.

District of Southwest Missouri

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-September 19 1862, transferred to Department of the Missouri)

Samuel Ryan Curtis (March 11 1862-June 4 1862), Egbert Benson Brown (June 4 1862-September 19 1862)

March 11 1862: The District of Southwest Missouri transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. Brigadier-General Samuel Ryan Curtis retained command of the District of Southwest Missouri.

May 2 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri.

May 11 1862: The District of Southeast Missouri was discontinued.

June 4 1862: State Brigadier-General Egbert Benson Brown assumed command of the District of Southwest Missouri, succeeding Major-General Samuel Ryan Curtis.

September 19 1862: The District of Southwest Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri.

District of Southeast Missouri

(Transferred from Department of the Missouri, May 2 1862-May 11 1862, discontinued)

Frederick Steele (May 2 1862-May 11 1862)

May 2 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri.

May 11 1862: The District of Southeast Missouri was discontinued.

District of Northeast Missouri

(Established, March 12 1862-June 4 1862, discontinued, to District of Missouri)

John Montgomery Glover (March 12 1862-June 4 1862)

March 12 1862: The District of Northeast Missouri was established in the Department of the Missouri, comprising the state of Missouri north of Randolph County and east of Linn County. Colonel John Montgomery Glover assumed command of the District of Northeast Missouri.

June 4 1862: The District of Northeast Missouri was discontinued, and incorporated into the District of Missouri.

District of Northwest Missouri

(Established, from District of North Missouri, March 12 1862-September 19 1862, transferred to Department of the Missouri)

Benjamin Franklin Loan March 12 1862-June 4 1862), vacant June 4 1862-August 13 1862), Willard Preble Hall (August 23 1862-September 19 1862)

March 12 1862: The District of Northwest Missouri was established in the Department of the Missouri, comprising the state of Missouri north of the Missouri River and west of the eastern boundary of Linn County. Missouri State Brigadier-General Benjamin Franklin Loan assumed command of the District of Northwest Missouri.

June 4 1862: Command of the District of Northwest Missouri became vacant.

August 23 1862: State Brigadier-General Willard Preble Hall assumed command of the District of Northwest Missouri, succeeding a vacancy after State Brigadier-General Benjamin Franklin Loan.

September 19 1862: The District of Northwest Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri.

District of Missouri

(Established, from District of Central Missouri, June 1 1862-September 19 1862, transferred to Department of the Missouri)

John McAllister Schofield (June 1 1862-September 19 1862)

June 1 1862: The District of Missouri was established in the Department (Military Division) of the Mississippi, comprising the state of Missouri except for Mississippi, New Madrid and Pemiscut counties. Brigadier-General John McAllister Schofield assumed command of the District of Missouri.

September 19 1862: The District of Missouri transferred from the Department (Military Division) of the Mississippi to the Department of the Missouri.

Army of the Southwest

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-September 19 1862, transferred to Department of the Missouri)

Samuel Ryan Curtis (March 11 1862-August 29 1862), Frederick Steele (August 29 1862-September 19 1862)

March 11 1862: The Army of the Southwest (“Army of Southwest Missouri”) transferred with the District of Southwest Missouri to the Department (Military Division) of the Mississippi. Brigadier-General Samuel Ryan Curtis retained command of the Army of the Southwest.

August 29 1862: Brigadier-General Frederick Steele assumed command of the Army of the Southwest, succeeding Major-General Samuel Ryan Curtis.

September 19 1862: The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri.

District of the Mississippi

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-June 16 1862, discontinued, to District of West Tennessee)

John Pope (March 11 1862-Apri l21 1862), Isaac Ferdinand Quinby (April 21 1862-June 16 1862)

March 11 1862: The District of the Mississippi transferred with the Department of the Missouri to the Department (Military Division) of the Mississippi. Major-General John Pope retained command of the District of the Mississippi. The Army of the Mississippi transferred from the District of the Mississippi to the Department (Military Division) of the Mississippi.

April 21 1862: Brigadier-General Isaac Ferdinand Quinby assumed command of the District of the Mississippi, succeeding Major-General John Pope.

June 16 1862: The District of the Mississippi was discontinued, and its territory transferred the District of West Tennessee.

District of West Tennessee

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-September 19 1862, transferred to War Department)

Charles Ferguson Smith (March 11 1862-March 17 1862), Ulysses Simpson Grant (March 17 1862-September 19 1862)

March 11 1862: The District of West Tennessee transferred from the Department of the Missouri to the Department (Military Division) of the Mississippi. Brigadier-General Charles Ferguson Smith assumed command of the District of West Tennessee, succeeding Major-General Ulysses Simpson Grant.

March 17 1862: Brigadier-General Ulysses Simpson Grant assumed command of the District of West Tennessee, succeeding Brigadier-General Charles Ferguson Smith.

June 16 1862: The District of the Mississippi was discontinued, and its territory transferred the District of West Tennessee.

June 21 1862: The Sub-District of Jackson was established in the District of West Tennessee.

June 26 1862: The Army of the Mississippi transferred from the Department (Military Division) of the Mississippi to the District of the West Tennessee.

September 19 1862: The District of West Tennessee transferred from the Department (Military Division) of the Mississippi to the War Department. The Sub-District of Jackson transferred with the District of West Tennessee to the War Department.

Sub-District of Jackson

(Established, June 21 1862-September 19 1862, transferred to War Department)

John Alexander McClernand (June 21 1862-August 25 1862), John Alexander Logan (August 25 1862-September 19 1862)

June 21 1862: The Sub-District of Jackson was established in the District of West Tennessee, comprising the territory around Jackson, City, Bolivar, Grand Junction, La Grange, Trenton and Humboldt, Tennessee. Major-General John Alexander McClernand assumed command of the Sub-District of Jackson.

August 25 1862: Brigadier-General John Alexander Logan assumed command of the Sub-District of Jackson, succeeding Major-General John Alexander McClernand.

September 19 1862: The Sub-District of Jackson transferred with the District of West Tennessee to the War Department.

 

Army of the Mississippi

(Transferred from Department (Military Division) of the Mississippi, June 26 1862-September 19 1862, transferred to War Department)

William Starke Rosecrans (June 26 1862-September 19 1862)

June 26 1862: The Army of the Mississippi transferred from the Department (Military Division) of the Mississippi to the District of the West Tennessee. Major-General William Starke Rosecrans assumed command of the Army of the Mississippi, succeeding Major-General John Pope.

September 19 1862: The Army of the Mississippi transferred from the Department (Military Division) of the Mississippi with the District of West Tennessee.

District of the Ohio

(Established, March 19 1862-July 16 1862, transferred to War Department)

Don Carlos Buell (March 19 1862-July 16 1862)

March 19 1862: The District of the Ohio was established in the Department (Military Division) of the Mississippi, comprising the territory east of the Tennessee River in Kentucky and Tennessee except for Fort Henry and Fort Donelson occupied by the Army of the Ohio. Brigadier-General Don Carlos Buell assumed command of the District of the Ohio.

July 16 1862: The District of the Ohio transferred from the Department (Military Division) of the Mississippi to the War Department.

District of Cairo

(Established, March 21 1862-August 19 1862, discontinued)

William Kerley Strong (March 21 1862-Apri l12 1862), James Madison Tuttle (April 12 1862-August 19 1862)

March 21 1862: The District of Cairo was established in the Department (Military Division) of the Mississippi, comprising the vicinity of Cairo, Illinois. Brigadier-General William Kerley Strong assumed command of the District of Cairo.

April 1 1862: The Sub-District of Columbus was established in the District of Cairo, comprising the vicinity of Columbus, Kentucky.

June 30 1862: The Sub-District of Columbus was discontinued.

August 12 1862: Brigadier-General James Madison Tuttle assumed command of the District of Cairo, succeeding Brigadier-General William Kerley Strong.

August 19 1862: The District of Cairo was discontinued.

Sub-District of Columbus

(Established, April 1 1862-June 30 1862, discontinued)

Isaac Ferdinand Quinby (April 1 1862-June 30 1862)

April 1 1862: The Sub-District of Columbus was established in the District of Cairo, comprising the vicinity of Columbus, Kentucky. Brigadier-General Isaac Ferdinand Quinby assumed command of the Sub-District of Columbus.

June 30 1862: The Sub-District of Columbus was discontinued.

District of Corinth

(Established, July 1 1862-September 19 1862, to District of West Tennessee)

William Starke Rosecrans (July 1 1862-September 19 1862)

July 1 1862: The District of Corinth was established in the Department (Military Division) of the Mississippi, comprising the vicinity of Corinth, Mississippi. Major-General William Starke Rosecrans assumed command of the District of Corinth.

September 19 1862: The District of Corinth transferred from the Department (Military Division) of the Mississippi to the District of West Tennessee.

Army of the Ohio

(Transferred from Department of the Ohio, March 11 1862-August 19 1862, transferred to Department of the Ohio)

Don Carlos Buell (March 11 1862-August 19 1862)

March 11 1862: The Army of the Ohio transferred from the Department of the Ohio to the Department (Military Division) of the Mississippi. Major-General Don Carlos Buell retained command of the Army of the Ohio.

August 19 1862: The Army of the Ohio transferred from the Department (Military Division) of the Mississippi to the Department of the Ohio. Major-General Don Carlos Buell retained command of the Army of the Ohio.

Army of West Tennessee (“Army of the Tennessee”)

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-September 19 1862, transferred to District of West Tennessee)

Ulysses Simpson Grant (March 11 1862-April 29 1862), George Henry Thomas (April 29 1862-September 19 1862)

March 11 1862: The Army of West Tennessee transferred from the District of West Tennessee to the Department (Military Division) of the Mississippi. The Army of West Tennessee was renamed unofficially the “Army of the Tennessee”. Major-General Ulysses Simpson Grant retained command of the Army of West Tennessee.

April 29 1862: Major-General George Henry Thomas assumed command of the Army of West Tennessee, succeeding Major-General Ulysses Simpson Grant.

September 19 1862: The Army of West Tennessee transferred from the Department (Military Division) of the Mississippi with the District of West Tennessee.

Army of the Mississippi

(Transferred from Department of the Missouri, March 11 1862-June 16 1862, transferred to District of West Tennessee)

John Pope (March 11 1862-June 16 1862)

February 23 1862: The Army of the Mississippi was officially announced for the proposed Department (Military Division) of the Mississippi, which would be formally established on March 1st 1862.

March 11 1862: The Army of the Mississippi transferred from the Department of the Missouri to the Department (Military Division) of the Mississippi. Major-General John Pope retained command of the Army of the Mississippi.

June 26 1862: The Army of the Mississippi transferred from the Department (Military Division) of the Mississippi to the District of the West Tennessee.

Department of Kansas

(Transferred to the Department (Military Division) of the Mississippi, March 11 1862-March 19 1862, discontinued, to District of Kansas)

David Hunter (March 11 1862-March 19 1862)

March 11 1862: The Department of Kansas transferred to the Department (Military Division) of the Mississippi. Major-General David Hunter retained command of the Department of Kansas.

March 19 1862: The Department of Kansas was discontinued, and its territory transferred to the District of Kansas.

District of Kansas

(Established, from Department of Kansas, March 19 1862-May 2 1862, discontinued, to Department of Kansas, See: Part 3c: Trans-Mississippi, Northwest and Frontier Theatre)

James William Denver (March 19 1862-April 10 1862), Samuel Davis Sturgis (April 10 1862-May 2 1862)

March 19 1862: The District of Kansas was established in the Department (Military Division) of the Mississippi. Brigadier-General James William Denver was appointed to command the District of Kansas, arriving on April 1 1862.

April 1 1862: Brigadier-General James William Denver arrived to command the District of Kansas.

April 10 1862: Brigadier-General Samuel Davis Sturgis assumed command of the District of Kansas, succeeding Brigadier-General James William Denver.

May 2 1862: The District of Kansas was discontinued, and its territory transferred to the Department of Kansas. See: Part 3c: Trans-Mississippi, Northwest and Frontier Theatre

District of the Ohio

(Transferred from Department (Military Division) of the Mississippi, July 16 1862-October 24 1862, discontinued, to Department of the Cumberland)

Don Carlos Buell (July 16 1862-October 24 1862)

July 16 1862: The District of the Ohio transferred from the Department of the Mississippi to the War Department. The District of the Ohio comprised the territory east of the Tennessee River in Kentucky and Tennessee except for Fort Henry and Fort Donelson occupied by the Army of the Ohio. Brigadier-General Don Carlos Buell assumed command of the District of the Ohio. Major-General Don Carlos Buell retained command of the District of the Ohio.

October 24 1862: The District of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland.

Department of the Ohio

(Established, August 19 1862-October 16 1863, transferred to Military Division of the Mississippi)

Horatio Gouverneur Wright August 19 1862-March 25 1863), Ambrose Everett Burnside (March 25 1863-October 16 1863)

August 19 1862: The Department of the Ohio was established, comprising Illinois, Indiana, western Ohio, western Michigan, Wisconsin, Missouri and Tennessee and Kentucky east of the Tennessee River, including the Cumberland Gap in Tennessee. Headquarters were at Cincinnati. These territories were detached from the Department (Military Division) of the Mississippi, the Department of the Potomac and the Mountain Department. Major-General Horatio Gouverneur Wright was appointed to command the Department of the Ohio, arriving on 23rd August 1862. The Army of the Ohio transferred to the Department of the Ohio.

August 23 1862: Major-General Horatio Gouverneur Wright arrived to command the Department of the Ohio.

August 24 1862: The District of Louisville was established in the Department of the Ohio, comprising the territory round Louisville, Kentucky.

August 25 1862: The Army of Kentucky was established in the Department of the Ohio.

August 30 1862: The Army of Kentucky was discontinued, and integrated into the Army of the Ohio.

September 6 1862: The state of Wisconsin was transferred from the Department of the Ohio to the Department of the Northwest.

September 19 1862: Alton, Illinois, transferred from the Department of the Ohio to the Department of the Missouri. Western Virginia transferred from the Department of the Potomac to the Department of the Ohio. The Sub-District of the Kanawha was established in the Department of the Ohio.

September 24 1862: The Cheat Mountain District was established in the Department of the Ohio, comprising the vicinity of Cheat Mountain, Virginia.

September 28 1862: The District of Western Virginia was established in the Department of the Ohio, comprising western Virginia and the counties in Ohio adjacent to Virginia.

October 16 1862: Cairo, Illinois, transferred from the Department of the Ohio to the Department of the Tennessee.

October 24 1862: Tennessee east of the Tennessee River (excluding Fort Henry and Fort Donelson and the territory around Cumberland Gap transferred from the Department the Ohio to the Department of the Cumberland. The portions of Alabama and Georgia under control of the Army of the Ohio transferred to the Department of the Cumberland. The Army of the Ohio was discontinued, and its forces transferred to the Army of the Cumberland. The District of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland.

November 13 1862: The Cheat Mountain District in the Department of the Ohio was discontinued.

November 17 1862: The District of Central Kentucky was established in the Department of the Ohio. The District of Eastern Kentucky was established in the Department of the Ohio. The District of Louisville was discontinued, and its territory incorporated into the District of Western Kentucky. The District of Western Kentucky was established in the Department of the Ohio. The Army of Kentucky was established in the Department of the Ohio.

March 16 1863: The District of Western Virginia was discontinued, and the territory of Western Virginia transferred from the Department of the Ohio to the Middle Department. The Sub-District of the Kanawha was discontinued.

March 17 1863: IX Corps (Virginia) transferred from the Department of Virginia to the Department of the Ohio.

March 23 1863: The District of Indiana was established in the Department of the Ohio.

March 25 1863: Brigadier-General Ambrose Everett Burnside assumed command of the Department of the Ohio, succeeding Brigadier-General Horatio Gouverneur Wright.

April 6 1863: The District of Ohio was established in the Department of the Ohio.

April 7 1863: The District of Illinois was established in the Department of the Ohio.

April 11 1863: The Army of the Ohio was established in the Department of the Ohio. IX Corps (Ohio) transferred from the Department of the Ohio to the Army of the Ohio.

May 22 1863: The District of Kentucky was established in the Department of the Ohio.

June 3 1863: Columbiana, Jefferson and Belmont counties, Ohio, were transferred from the District of Ohio to the Department of the Monongahela. Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.

June 5 1863: The District of Indiana was discontinued, and its territory transferred to the District of Indiana and Michigan. The District of Indiana and Michigan was established in the Department of the Ohio

June 9 1863: Columbiana, Jefferson and Belmont counties, Ohio, were transferred from the District of Ohio in the Department of the Ohio to the Department of the Monongahela. Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.

June 24 1863: The Ohio counties south of Belmont and neighbouring western Virginia were transferred from the Department of the Ohio to the Department of West Virginia.

July 4 1863: The District of Central Kentucky was discontinued.

September 11 1863: The District of Indiana and Michigan was discontinued, and its territory transferred to the District of Indiana. The District of Indiana was established in the Department of the Ohio.

October 16 1863: The Department of the Ohio transferred to the Military Division of the Mississippi. The Army of the Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi. The Army of the Ohio transferred to the Military Division of the Mississippi. IX Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi. The District of Eastern Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Western Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Illinois transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Indiana transferred with the Department of the Ohio to the Military Division of the Mississippi. XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi.

District of Louisville

(Established, August 24 1862-November 17 1862, discontinued, to District of Western Kentucky)

Jeremiah Tilford Boyle (August 24 1862-November 17 1862)

August 24 1862: The District of Louisville was established in the Department of the Ohio, comprising the territory round Louisville, Kentucky. Brigadier-General Jeremiah Tilford Boyle assumed command of the District of Louisville.

November 17 1862: The District of Louisville was discontinued, and its area incorporated into the District of Western Kentucky.

Sub-District of the Kanawha

(Established, September 19 1862-September 28 1862, transferred to District of Western Virginia)

Joseph Andrew Jackson Lightburn (September 19 1862-September 28 1862)

September 19 1862: The Sub-District of the Kanawha was established in the Department of the Ohio. Colonel Joseph Andrew Jackson Lightburn assumed command of the Sub-District of the Kanawha.

September 28 1862: The Sub-District of the Kanawha transferred to the District of Western Virginia in the Department of the Ohio.

Cheat Mountain District

(Established, September 24 1862-November 13 1862, discontinued)

Robert Huston Milroy (September 24 1862-November 13 18621863)

September 24 1862: The Cheat Mountain District was established in the Department of the Ohio, comprising the vicinity of Cheat Mountain, Virginia. Brigadier-General Robert Huston Milroy assumed command of the Cheat Mountain District.

November 13 1862: The Cheat Mountain District in the Department of the Ohio was discontinued.

District of Western Virginia

(Established, September 28 1862-March 16 1863, discontinued, to Middle Department)

Quincy Adams Gillmore (September 28 1862-October 4 1862), Jacob Dolson Cox (October 4 1862-March 16 1863)

September 28 1862: The District of Western Virginia was established in the Department of the Ohio, comprising western Virginia and the counties in Ohio adjacent to Virginia. Brigadier-General Quincy Adams Gillmore assumed command of the District of Western Virginia.

October 4 1862: Brigadier-General Jacob Dolson Cox assumed command of the District of Western Virginia, succeeding Brigadier-General Quincy Adams Gillmore.

March 16 1863: The District of Western Virginia was discontinued, and the territory of Western Virginia transferred from the Department of the Ohio to the Middle Department. The Sub-District of the Kanawha was discontinued.

Sub-District of the Kanawha

(Transferred from Department of the Ohio, September 28 1862-March 16 1863, discontinued)

Joseph Andrew Jackson Lightburn (September 28 1862-October 15 1862) Eliakim Parker Scammon (October 15 1862-March 16 1863)

September 28 1862: The Sub-District of the Kanawha transferred to the District of Western Virginia in the Department of the Ohio. Brigadier-General Joseph Andrew Jackson Lightburn retained command of the Sub-District of the Kanawha.

October 15 1862: Brigadier-General Eliakim Parker Scammon assumed command of the Sub-District of the Kanawha, succeeding Colonel Joseph Andrew Jackson Lightburn.

March 16 1863: The Sub-District of the Kanawha was discontinued.

District of Central Kentucky

(Established, November 17 1862-July 4 1863, discontinued)

Gordon Granger (November 17 1862-January 25 1863), Quincy Adams Gillmore (January 25 1863-April 10 1863), Orlando Bolivar Willcox (April 10 1863-June 4 1863), Samuel Davis Sturgis (June 4 1863-July 4 1863)

November 17 1862: The District of Central Kentucky was established in the Department of the Ohio, comprising the 43 counties in the central portion of the state. Major-General Gordon Granger assumed command of the District of Central Kentucky.

January 25 1863: Brigadier-General Quincy Adams Gillmore assumed command of the District of Central Kentucky, succeeding Major-General Gordon Granger.

April 10 1863: Brigadier-General Orlando Bolivar Willcox assumed command of the District of Central Kentucky, succeeding Brigadier-General Quincy Adams Gillmore.

June 4 1863: Brigadier-General Samuel Davis Sturgis assumed command of the District of Central Kentucky, succeeding Brigadier-General Orlando Bolivar Willcox.

July 4 1863: The District of Central Kentucky was discontinued.

District of Eastern Kentucky

(Established, November 17 1862-October 16 1863, transferred to Military Division of the Mississippi)

Jonathan Cranor (November 17 1862-February 5 1863), Julius White (February 5 1863-August 6 1863), Samuel Powhatan Carter (August 6 1863-August 15 1863)), George W Gallup (August 15 1863-October 16 1863)

November 17 1862: The District of Eastern Kentucky was established in the Department of the Ohio, comprising the nine easternmost counties in Kentucky. Colonel Jonathan Cranor assumed command of the District of Eastern Kentucky.

February 5 1863: Brigadier-General Julius White assumed command of the District of Eastern Kentucky, succeeding Colonel Jonathan Cranor.

August 6 1863: Brigadier-General Samuel Powhatan Carter assumed command of the District of Eastern Kentucky, succeeding Brigadier-General Julius White.

August 15 1863: Colonel George W Gallup assumed command of the District of Eastern Kentucky, succeeding Brigadier-General Samuel Powhatan Carter.

October 16 1863: The District of Eastern Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi.

October 16 1863: The District of Eastern Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi.

District of Western Kentucky

(Established, November 17 1862-October 16 1863, transferred to Military Division of the Mississippi)

Jeremiah Tilford Boyle (November 17 1862-October 16 1863)

November 17 1862: The District of Western Kentucky was established in the Department of the Ohio, comprising the territory of Kentucky west of the counties of Oldham, Shelby, Spencer, Washington, Marion, Taylor, Adair, Russell and Clinton. The District of Louisville was discontinued, and its territory incorporated into the District of Western Kentucky. Brigadier-General Jeremiah Tilford Boyle assumed command of the District of Western Kentucky.

October 16 1863: The District of Western Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi.

District of Indiana

(Established, March 23 1863-June 5 1863, discontinued, to District of Indiana and Michigan)

Henry Beebe Carrington (March 23 1863-April 15 1863), Milo Smith Hascall (April 15 1863-June 5 1863)

March 23 1863: The District of Indiana was established in the Department of the Ohio, comprising the state of Indiana. Brigadier-General Henry Beebe Carrington assumed command of the District of Indiana.

April 15 1863: Brigadier-General Milo Smith Hascall assumed command of the District of Indiana, succeeding Brigadier-General Henry Beebe Carrington.

June 5 1863: The District of Indiana was discontinued, and its territory transferred to the District of Indiana and Michigan.

District of Ohio

(Established, April 6 1863-October 16 1863, transferred to Military Division of the Mississippi)

John Sanford Mason (April 6 1863-April 14 1863), Jacob Dolson Cox (April 14 1863-October 16 1863)

April 6 1863: The District of Ohio was established in the Department of the Ohio, comprising the state of Ohio. Brigadier-General John Sanford Mason assumed command of the District of Ohio.

April 14 1863: Major-General Jacob Dolson Cox assumed command of the District of Ohio, succeeding Brigadier-General John Sanford Mason.

June 3 1863: Columbiana, Jefferson and Belmont counties, Ohio, were transferred from the District of Ohio to the Department of the Monongahela. Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.

June 24 1863: The Ohio counties south of Belmont and neighbouring western Virginia were transferred from the Department of the Ohio to the Department of West Virginia.

October 16 1863: The District of Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi.

District of Illinois

(Established, April 7 1863-October 16 1863, transferred to Military Division of the Mississippi)

Jacob Ammen (April 7 1863-October 16 1863)

April 7 1863: The District of Illinois was established in the Department of the Ohio, comprising the state of Illinois. Brigadier-General Jacob Ammen assumed command of the District of Illinois.

October 16 1863: The District of Illinois transferred with the Department of the Ohio to the Military Division of the Mississippi.

District of Kentucky

(Established, May 22 1863-October 16 1863, transferred to Military Division of the Mississippi)

Jeremiah Tilford Boyle (May 22 1863-October 16 1863)

May 22 1863: The District of Kentucky was established in the Department of the Ohio, comprising the state of Kentucky. Brigadier-General Jeremiah Tilford Boyle assumed command of the District of Kentucky.

October 16 1863: The District of Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi.

District of Indiana and Michigan

(Established, From District of Indiana, June 5 1863-September 11 1863, to District of Indiana)

Orlando Bolivar Willcox (June 5 1863-September 11 1863)

June 5 1863: The District of Indiana and Michigan was established in the Department of the Ohio, comprising the states of Indiana and Michigan. The District of Indiana was discontinued. Brigadier-General Orlando Bolivar Willcox assumed command of the District of Indiana and Michigan.

September 11 1863: The District of Indiana and Michigan was discontinued, and its territory transferred to the District of Indiana.

 

District of Indiana

(Established, September 11 1863-October 16 1863, transferred to Military Division of the Mississippi)

John Smith Simonson (September 11 1863-October 16 1863)

September 11 1863: The District of Indiana and Michigan was discontinued, and its territory transferred to the District of Indiana. The District of Indiana was established in the Department of the Ohio, comprising the state of Indiana. Colonel John Smith Simonson assumed command of the District of Indiana.

October 16 1863: The District of Indiana transferred with the Department of the Ohio to the Military Division of the Mississippi.

Army of the Ohio

(Transferred from Department (Military Division) of the Mississippi, August 19 1862-October 24 1862, discontinued, to Army of the Cumberland)

Don Carlos Buell (August 19 1862-September 30 1862), George Henry Thomas (temporary September 20 1862-October 1 1862) Don Carlos Buell (October 1 1862-October 24 1862)

August 19 1862: The Army of the Ohio transferred from the Department (Military Division) of the Mississippi to the Department of the Ohio. Major-General Don Carlos Buell retained command of the Army of the Ohio.

September 29 1862: I Corps (Ohio) was established in the Army of the Ohio. II Corps (Ohio) was established in the Army of the Ohio. III Corps (Ohio) was established in the Army of the Ohio from the “Army of Kentucky”

September 30 1862: Major-General George Henry Thomas assumed temporary command of the Army of the Ohio, succeeding Major-General Don Carlos Buell.

October 1 1862: Major-General Don Carlos Buell assumed command of the Army of the Ohio, succeeding Major-General George Henry Thomas.

October 24 1862: The Army of the Ohio was discontinued, and its forces transferred to the Army of the Cumberland as XIV Corps (Cumberland). Although the Department of the Ohio had not existed between March 11th and August 19th 1862 the name “Army of the Ohio” continued to be used unofficially until 24th October 1862. I Corps (Ohio) transferred to the Army of the Cumberland and renamed I Corps (Cumberland). II Corps (Ohio) transferred to the Army of the Cumberland and renamed II Corps (Cumberland). III Corps (Ohio) transferred to the Army of the Cumberland and renamed III Corps (Cumberland).

I Corps Ohio

(Established, September 29 1862-October 24 1862, discontinued, to I Corps Cumberland)

Alexander McDowell McCook (September 29 1862-October 24 1862)

September 29 1862: I Corps (Ohio) was established in the Army of the Ohio. Major-General Alexander McDowell McCook assumed command of I Corps (Ohio).

October 24 1862: I Corps (Ohio) was discontinued, and its forces transferred to the Army of the Cumberland and renamed I Corps (Cumberland).

II Corps Ohio

(Established, September 29 1862-October 24 1862, discontinued, to II Corps Cumberland)

Thomas Leonidas Crittenden (September 29 1862-October 24 1862)

September 29 1862: II Corps (Ohio) was established in the Army of the Ohio. Major-General Thomas Leonidas Crittenden assumed command of II Corps (Ohio).

October 24 1862: II Corps (Ohio) was discontinued, and its forces transferred to the Army of the Cumberland and renamed II Corps (Cumberland).

 

III Corps Ohio

(Established, from former Army of Kentucky, September 29 1862-October 24 1862, discontinued, to III Corps Cumberland)

Charles Champion Gilbert (September 29 1862-October 10 1862), Gordon Granger (October 10 1862-October 24 1862)

September 29 1862: III Corps (Ohio) was established in the Army of the Ohio from the “Army of Kentucky”. Brigadier-General Charles Champion Gilbert assumed command of III Corps (Ohio).

October 10 1862: Major-General Gordon Granger assumed command of III Corps (Ohio) “Army of Kentucky”, succeeding Brigadier-General Charles Champion Gilbert.

October 24 1862: III Corps (Ohio) was discontinued, and its forces transferred to the Army of the Cumberland and renamed III Corps (Cumberland).

 

Army of Kentucky

(Established, August 25 1862-August 30 1862, discontinued, to III Corps (Ohio))

William Nelson (August 25 1862-August 30 1862)

August 25 1862: The Army of Kentucky was established in the Department of the Ohio from field forces of the former Department of Kentucky. Brigadier-General William Nelson assumed command of the Army of Kentucky.

August 30 1862: The Army of Kentucky was discontinued, and integrated into the Army of the Ohio, retaining the unofficial name “Army of Kentucky”.

September 29 1862: III Corps (Ohio) was established in the Army of the Ohio from the “Army of Kentucky”.

Army of Kentucky

(Established, November 17 1862-January 20 1863, discontinued, to Reserve Corps (Cumberland))

Gordon Granger (November 17 1862-January 20 1863)

November 17 1862: The Army of Kentucky was established in the Department of the Ohio. Major-General Gordon Granger assumed command of the reformed Army of Kentucky.

January 20 1863: The Army of Kentucky was discontinued. The term was used unofficially until 8th June 1863, when these forces were renamed Reserve Corps (Cumberland).

IX Corps Ohio

(Transferred from Army of the Potomac, March 17 1863-April 11 1863, transferred to Army of the Ohio)

Ambrose Everett Burnside, (March 17 1863-March 20 1863) John Grubb Parke (March 20 1863-April 7 1863), Orlando Bolivar Willcox (April 6 1863-April 11 1863)

March 17 1863: IX Corps transferred from the Department of Virginia to the Department of the Ohio. Major-General Ambrose Everett Burnside assumed command of IX Corps (Ohio), succeeding Brigadier-General Orlando Bolivar Willcox.

March 20 1863: Major-General John Grubb Parke assumed command of IX Corps (Ohio), succeeding Major-General Ambrose Everett Burnside.

April 6 1863 Brigadier-General Orlando Bolivar Willcox assumed command of IX Corps (Ohio), succeeding Major-General John Grubb Parke.

April 11 1863: IX Corps (Ohio) transferred to the Army of the Ohio.

Army of the Ohio

(Established, April 11 1863-October 16 1863, transferred to Military Division of the Mississippi)

Ambrose Everett Burnside (April 11 1863-October 16 1863)

April 11 1863: The Army of the Ohio was established in the Department of the Ohio. Major-General Ambrose Everett Burnside assumed command of the Army of the Ohio. IX Corps (Ohio) transferred from the Department of the Ohio to the Army of the Ohio.

May 28 1863: XXIII Corps (Ohio) was established in the Army of the Ohio.

June 5 1863: IX Corps transferred from the Army of the Ohio to the Department of the Tennessee.

August 25 1863: IX Corps (Tennessee) transferred from the Department of the Tennessee to the Army of the Ohio.

October 16 1863: The Army of the Ohio transferred to the Military Division of the Mississippi. XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi. IX Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi.

IX Corps Ohio

(Transferred from Department of the Ohio, April 11 1863-June 5 1863, transferred to Department of the Tennessee)

Orlando Bolivar Willcox (April 11 1863-June 5 1863)

April 11 1863: IX Corps (Ohio) transferred from the Department of the Ohio to the Army of the Ohio. Brigadier-General Orlando Bolivar Willcox retained command of IX Corps (Ohio).

June 5 1863: IX Corps (Ohio) transferred from the Army of the Ohio to the Department of the Tennessee.

XXIII Corps Ohio

(Established, May 28 1863-October 16 1863, transferred to Military Division of the Mississippi)

George Lucas Hartsuff (May 28 1863-September 24 1863), Mahlon Dickerson Manson (September 24 18643-October 16 1863)

May 28 1863: XXIII Corps (Ohio) was established in the Army of the Ohio from forces and garrisons in the Department of the Ohio. This force subsequently later became known unofficially as the “Army of the Ohio”. Major-General George Lucas Hartsuff assumed command of XXIII Corps (Ohio).

September 24 1863: Brigadier-General Mahlon Dickerson Manson assumed command of XXIII Corps (Ohio), succeeding Major-General George Lucas Hartsuff.

October 16 1863: XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi.

IX Corps Ohio

(Transferred from Department of the Tennessee, August 25 1863-October 16 1863, transferred to Military Division of the Mississippi)

Robert Brown Potter (temporary August 25 1863-September 15 1863), John Grubb Parke (temporary September 15 1863-September 17 1863), Ambrose Everett Burnside (September 17 1863-October 16 1863)

August 25 1863: IX Corps (Tennessee) transferred from the Department of the Tennessee to the Army of the Ohio. Brigadier-General Robert Brown Potter assumed temporary command of IX Corps (Ohio), succeeding Major-General John Grubb Parke.

September 15 1863: Major-General John Grubb Parke assumed temporary command of IX Corps (Ohio), succeeding Brigadier-General Robert Brown Potter.

September 17 1863: Major-General Ambrose Everett Burnside assumed command of IX Corps (Ohio), succeeding Major-General John Grubb Parke.

October 16 1863: IX Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi.

District of West Tennessee

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-October 16 1862, transferred to Department of the Tennessee)

Ulysses Simpson Grant (September 19 1862-October 16 1862)

September 19 1862: The District of West Tennessee transferred from the Department (Military Division) of the Mississippi to the War Department. It comprised the territory around Fort Henry and Fort Donelson in Tennessee, southwards to Corinth, Mississippi. It was the operational territory of the Army of West Tennessee or “Army of the Tennessee”. Major-General Ulysses Simpson Grant retained command of the District of West Tennessee. The Sub-District of Jackson transferred with the District of West Tennessee to the War Department. The District of Corinth transferred with the District of West Tennessee to the War Department. The Army of the Mississippi transferred with the District of West Tennessee to the War Department. The Army of West Tennessee transferred with the District of West Tennessee to the War Department.

October 16 1862: The District of West Tennessee was discontinued, and its territory transferred to the Department of the Tennessee. The Army of West Tennessee was discontinued, and incorporated into the Army of the Tennessee. The District of Corinth transferred from the District of West Tennessee to the Department of Tennessee. The Sub-District of Jackson was discontinued. The District of Jackson was established in the Department of the Tennessee. The Army of the Mississippi transferred to the Department of the Tennessee.

District of Corinth

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-October 16 1862, transferred to Department of the Tennessee)

William Starke Rosecrans (September 19 1862-October 16 1862)

September 19 1862: The District of Corinth transferred from the Department (Military Division) of the Mississippi to the District of West Tennessee. Major-General William Starke Rosecrans retained command of the District of Corinth.

October 16 1862: The District of Corinth transferred from the District of West Tennessee to the Department of Tennessee.

Sub-District of Jackson

(Transferred from Department (Military Division) of the Mississippi, September 19 1862-October 16 1862, discontinued, to District of Jackson)

John Alexander Logan (September 19 1862-September 24 1862), Edward Otho Cresap Ord (September 24 1862-October 5 1862), Stephen Augustus Hurlbut (October 5 1862-October 16 1862)

September 19 1862: The Sub-District of Jackson transferred with the District of West Tennessee. Brigadier-General John Alexander Logan retained command of the Sub-District of Jackson.

September 24 1862: Major-General Edward Otho Cresap Ord assumed command of the Sub-District of Jackson, succeeding Brigadier-General John Alexander Logan.

October 5 1862: Major-General Stephen Augustus Hurlbut assumed command of the Sub-District of Jackson, succeeding Major-General Edward Otho Cresap Ord.

October 16 1862: The Sub-District of Jackson was discontinued. The District of Jackson was established in the Department of the Tennessee.

Army of West Tennessee

(Transferred from Department (Military Division) of the Mississippi September 19 1862-October 16 1862, discontinued, to Army of the Tennessee)

George Henry Thomas (September 19 1862-October 16 1862)

September 19 1862: The Army of West Tennessee transferred with the District of West Tennessee from the Department (Military Division) of the Mississippi. Major-General George Henry Thomas retained command of the Army of West Tennessee.

October 16 1862: The Army of West Tennessee was discontinued, and incorporated into the Army of the Tennessee.

Army of the Mississippi

(Transferred from Department (Military Division) of the Mississippi September 19 1862-October 16 1862, transferred to Department of the Tennessee)

William Starke Rosecrans (September 19 1862-October 16 1862)

September 19 1862: The Army of the Mississippi transferred with the District of West Tennessee from the Department (Military Division) of the Mississippi. Major-General William Starke Rosecrans retained command of the Army of the Mississippi.

October 16 1862: The Army of the Mississippi transferred from the District of West Tennessee to the Army of the Tennessee.

Department of the Tennessee

(Established, from District of West Tennessee, October 16 1862-October 16 1863, transferred to Military Division of the Mississippi)

Ulysses Simpson Grant (October 16 1862-October 16 1863)

October 16 1862: The Department of the Tennessee was established, comprising the territory around Cairo, Illinois, Forts Henry and Donelson, northern Mississippi, and parts of Kentucky and Tennessee west of the Tennessee River. Cairo, Illinois, transferred from the Department of the Ohio to the Department of the Tennessee. The District of West Tennessee was discontinued, and its territory incorporated into the Department of the Tennessee. Major-General Ulysses Simpson Grant was appointed to command the Department of the Tennessee, arriving on 25th October 1862. The District of Corinth transferred from the District of West Tennessee to the Department of the Tennessee. The District of Jackson was established in the Department of the Tennessee. The Army of West Tennessee was discontinued, and incorporated into the Army of the Tennessee. The Army of the Tennessee was established in the Department of the Tennessee. The Army of the Mississippi transferred from the District of West Tennessee to the Army of the Tennessee.

October 24 1862: The Army of the Mississippi was discontinued, and incorporated into XIII Corps (Tennessee).

October 25 1862: Major-General Ulysses Simpson Grant arrived to command the Department of the Tennessee.

October 26 1862: The District of Memphis was established in the Department of the Tennessee.

October 30 1862: The District of Columbus was established in the Department of the Tennessee.

December 18 1862: XIII Corps (Tennessee) was reorganised and divided into four Corps: XIII Corps (Tennessee), XV Corps (Tennessee), XVI Corps (Tennessee) and XVII Corps (Tennessee).

January 4 1863: The “Army of the Mississippi” was established unofficially in the Department of the Tennessee. XIII Corps (Tennessee) was temporarily discontinued, and renamed unofficially as “I Corps (Mississippi)”. The unofficial “I Corps (Mississippi)” was established in the “Army of the Mississippi” from the forces in XIII Corps (Tennessee). XV Corps (Tennessee) was temporarily discontinued, and renamed unofficially as “II Corps (Mississippi)”. The unofficial “II Corps (Mississippi)” was established in the Army “of the Mississippi”.

January 12 1863: The unofficial “Army of the Mississippi” was discontinued, and its forces transferred to the Army of the Tennessee. The unofficial “I Corps (Mississippi)” was discontinued, and re-designated as XIII Corps (Tennessee). The unofficial “II Corps (Mississippi)” was discontinued, and re-designated as XV Corps (Tennessee).

January 15 1863: The District of West Tennessee was established in the Department of the Tennessee. The District of Columbus was discontinued, and its territory incorporated into the District of West Tennessee. The District of Corinth was discontinued, and its territory incorporated into the District of West Tennessee. The District of Memphis was discontinued, and its territory transferred to the District of West Tennessee. The Sub-District of Memphis was established in the District of West Tennessee.

January 19 1863: Portions of Arkansas were transferred temporarily from the Department of the Missouri to the Department of the Tennessee.

February 14 1863: The District of Eastern Arkansas transferred from the Department of the Missouri to the Department of the Tennessee.

May 11 1863: The District of Northeast Louisiana was established in the Department of the Tennessee.

May 28 1863: The District of Jackson was discontinued.

June 5 1863: IX Corps (Ohio) transferred from the Army of the Ohio to the Department of the Tennessee.

August 25 1863: IX Corps (Tennessee) transferred from the Department of the Tennessee to the Army of the Ohio.

October 16 1863: The Department of the Tennessee transferred to the Military Division of the Mississippi. The District of West Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi. The Sub-District of Memphis transferred with the District of West Tennessee to the Military Division of the Mississippi. The District of Northeast Louisiana transferred with the Department of the Tennessee to the Military Division of the Mississippi. The District of Eastern Arkansas transferred with the Department of the Tennessee to the Military Division of the Mississippi. The Army of the Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi

District of Corinth

(Transferred from District of West Tennessee, October 16 1862-January 15 1863, discontinued, to District of West Tennessee)

William Starke Rosecrans (October 16 1862-October 20 1862), Charles Smith Hamilton (October 20 1862-January 15 1863)

October 16 1862: The District of Corinth transferred from the District of West Tennessee to the Department of Tennessee. Major-General William Starke Rosecrans retained command of the District of Corinth.

October 20 1862: Major-General Charles Smith Hamilton assumed command of the District of Corinth, succeeding Major-General William Starke Rosecrans.

January 15 1863: The District of Corinth was discontinued, and incorporated into the District of West Tennessee.

District of Jackson

(Established, from Sub-District of Jackson, October 16 1862-May 28 1863, discontinued)

Stephen Augustus Hurlbut (October 16 1862-November 19 1862), Jeremiah Cutler Sullivan (November 19 1862-March 20 1863), Nathan Kimball (March 20 1863-May 28 1863)

October 16 1862: The District of Jackson was established in the Department of the Tennessee, to comprise the former Sub-District of Jackson. Major-General Stephen Augustus Hurlbut assumed command of the District of Jackson.

November 19 1862: Brigadier-General Jeremiah Cutler Sullivan assumed command of the District of Jackson, succeeding Major-General Stephen Augustus Hurlbut.

March 20 1863: Brigadier-General Nathan Kimball assumed command of the District of Jackson, succeeding Brigadier-General Jeremiah Cutler Sullivan.

May 28 1863: The District of Jackson was discontinued.

District of Memphis

(Established, October 26 1862-January 15 1863, discontinued. to Sub-District of Memphis)

William Tecumseh Sherman (October 26 1862-November 25 1862), Stephen Augustus Hurlbut (November 25 1862-January 6 1863), James Clifford Veatch (January 6 1863-January 15 1863)

October 26 1862: The District of Memphis was established in the Department of the Tennessee, comprising Tennessee south of the Hatchie River and west of Bolivar. Major-General William Tecumseh Sherman assumed command of the District of Memphis.

November 25 1862: Major-General Stephen Augustus Hurlbut assumed command of the District of Memphis, succeeding Major-General William Tecumseh Sherman.

January 6 1863: Brigadier-General James Clifford Veatch assumed command of the District of Memphis, succeeding Major-General Stephen Augustus Hurlbut.

January 15 1863: The District of Memphis was discontinued, and its territory transferred as the Sub-District of Memphis to the District of West Tennessee.

District of Columbus

(Established, October 30 1862-January 15 1863, discontinued, to District of West Tennessee)

Thomas Alfred Davies (October 30 1862-January 11 1863), Alexander Asboth (January 11 1863-January 15 1863)

October 30 1862: The District of Columbus was established in the Department of the Tennessee, comprising parts of Kentucky and Tennessee west of the Tennessee River north of a line running from Big Sandy, through Paris, Tennessee, to the Obion River and along that river to the Mississippi River. Brigadier-General Thomas Alfred Davies assumed command of the District of Columbus.

January 11 1863: Brigadier-General Alexander Asboth assumed command of the District of Columbus, succeeding Brigadier-General Thomas Alfred Davies.

January 15 1863: The District of Columbus was discontinued, and its territory incorporated into the District of West Tennessee.

District of West Tennessee

(Established, from District of Columbus, District of Corinth, and District of Memphis, January 15 1863-October 16 1863, transferred to Military Division of the Mississippi)

Charles Smith Hamilton (January 15 1863-February 11 1863), Stephen Augustus Hurlbut (February 11 1863-October 16 1863)

January 15 1863: The District of West Tennessee was established in the Department of the Tennessee, comprising the territories formerly under the authority of the District of Columbus, the District of Corinth and the District of Memphis. Major-General Charles Smith Hamilton assumed command of the District of West Tennessee. The Sub-District of Memphis was established in the District of West Tennessee. Major-General Charles Smith Hamilton assumed command of the District of West Tennessee.

February 11 1863: Major-General Stephen Augustus Hurlbut assumed command of the District of West Tennessee, succeeding Major-General Charles Smith Hamilton.

October 16 1863: The District of West Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi.

Sub-District of Memphis

(Established, from District of Memphis, January 15 1863-October 16 1863, transferred to Military Division of the Mississippi)

James Clifford Veatch (January 15 1863-October 16 1863)

January 15 1863: The Sub-District of Memphis established in the District of West Tennessee, comprising the former District of Memphis. Brigadier-General James Clifford Veatch retained command of the District of Memphis.

October 16 1863: The Sub-District of Memphis transferred with the District of West Tennessee to the Military Division of the Mississippi.

District of Eastern Arkansas

(Transferred from Department of the Missouri, February 14 1863-October 16 1863, transferred to Military Division of the Mississippi)

Benjamin Mayberry Prentiss (February 14 1863-August 3 1863), Frederick Sigel Saloman (August 3 1863-September 19 1863), Napoleon Bonaparte Buford (September 19 1863-October 16 1863)

February 14 1863: The District of Eastern Arkansas transferred from the Department of the Missouri to the Department of the Tennessee. Major-General Benjamin Mayberry Prentiss assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Willis Arnold Gorman.

August 3 1863: Brigadier-General Frederick Sigel Saloman assumed command of the District of Eastern Arkansas, succeeding Major-General Benjamin Mayberry Prentiss.

September 19 1863: Brigadier-General Napoleon Bonaparte Buford assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Frederick Sigel Saloman.

October 16 1863: The District of Eastern Arkansas transferred with the Department of the Tennessee to the Military Division of the Mississippi.

District of Northeast Louisiana

(Established, May 11 1863-October 16 1863, transferred to Military Division of the Mississippi)

Elias Smith Dennis (May 11 1863-July 28 1863), Isaac Fitzgerald Shepard (July 28 1863-August 18 1863), John Parker Hawkins (August 18 1863-October 16 1863)

May 11 1863: The District of Northeast Louisiana was established in the Department of the Tennessee, comprising the territory around Milliken’s Bend, Young’s Point, Goodrich’s Landing, Lake Providence and Transylvania along the west bank of the Mississippi River. Brigadier-General Elias Smith Dennis assumed command of the District of Northeast Louisiana.

July 28 1863: Colonel Isaac Fitzgerald Shepard assumed command of the District of Northeast Louisiana, succeeding Brigadier-General Elias Smith Dennis.

August 18 1863: Brigadier-General John Parker Hawkins assumed command of the District of Northeast Louisiana, succeeding Colonel Isaac Fitzgerald Shepard.

October 16 1863: The District of Northeast Louisiana transferred with the Department of the Tennessee to the Military Division of the Mississippi.

Army of the Mississippi

(Transferred from District of West Tennessee, October 16 1862-October 24 1862, discontinued, to XIII Corps (Tennessee))

William Starke Rosecrans (October 16 1862-October 24 1862)

October 16 1862: The Army of the Mississippi transferred from the District of West Tennessee to the Army of the Tennessee. Major-General William Starke Rosecrans retained command of the Army of the Mississippi.

October 24 1862: The Army of the Mississippi was discontinued, and incorporated into XIII Corps (Tennessee).

Army of the Tennessee

(Established, from Army of West Tennessee, October 16 1862-October 16 1863, transferred to Military Division of the Mississippi)

Ulysses Simpson Grant (October 16 1862-October 16 1863)

October 16 1862: The Army of the Tennessee was established in the Department of the Tennessee, comprising the former Army of West Tennessee (known unofficially as the Army of the Tennessee). Major-General Ulysses Simpson Grant assumed command of the Army of the Tennessee.

October 24 1862: XIII Corps was established in the Army of the Tennessee from the Army of the Mississippi and the field forces of the District of Memphis, the District of Corinth and the District of Jackson. The Army of the Tennessee was initially synonymous with XIII Corps (Tennessee).

November 1 1862: Right Wing XIII Corps (Tennessee) was established in the Army of the Tennessee. Left Wing XIII Corps (Tennessee) was established in the Army of the Tennessee.

November 27 1862: Centre XIII Corps (Tennessee) was established in the Army of the Tennessee.

December 18 1862: XV Corps (Tennessee) was designated in the Army of the Tennessee. XVI Corps (Tennessee) was designated in the Army of the Tennessee, XVII Corps (Tennessee) was designated in the Army of the Tennessee.

December 22 1862: Centre XIII Corps (Tennessee) was discontinued, and incorporated into XVII Corps (Tennessee). Left Wing XIII Corps (Tennessee) was discontinued, and incorporated into XVI Corps (Tennessee) and Left Wing XVI Corps (Tennessee). Right Wing XIII Corps (Tennessee) was discontinued, and incorporated into XV Corps (Tennessee). Major-General John Alexander McClernand assumed command of XIII Corps (Tennessee). XV Corps (Tennessee) was established in the Army of the Tennessee. XVI Corps (Tennessee) was established in the Army of the Tennessee. Left Wing XVI Corps (Tennessee) was established in the Army of the Tennessee. XVII Corps (Tennessee) was established in the Army of the Tennessee.

January 4 1863: The “Army of the Mississippi” was established unofficially in the Department of the Tennessee. XIII Corps (Tennessee) was temporarily discontinued, and renamed unofficially as “I Corps (Mississippi)”. The unofficial “I Corps (Mississippi)” was established in the “Army of the Mississippi” from the forces in XIII Corps (Tennessee). XV Corps (Tennessee) was temporarily discontinued, and renamed unofficially as “II Corps (Mississippi)”. The unofficial “II Corps (Mississippi)” was established in the Army “of the Mississippi”.

January 12 1863: The unofficial “Army of the Mississippi” was discontinued, and its forces transferred to the Army of the Tennessee. The unofficial “I Corps (Mississippi)” was discontinued, and re-designated as XIII Corps (Tennessee). The unofficial “II Corps (Mississippi)” was discontinued, and re-designated as XV Corps (Tennessee).

August 7 1863: XIII Corps (Tennessee) transferred from the Army of the Tennessee to the Army of the Gulf.

October 16 1863: The Army of the Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. XVI Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Left Wing XVI Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

XIII Corps Tennessee

(Established, October 24 1862-January 4 1863, discontinued, to “I Corps Mississippi”)

Ulysses Simpson Grant (October 24 1862-December 18 1862 interim December 22 1862), John Alexander McClernand (December 18 1862-January 4 1863)

October 24 1862: XIII Corps was established in the Army of the Tennessee. Major-General Ulysses Simpson Grant assumed command of XIII Corps (Tennessee).

November 1 1862: Right Wing XIII Corps (Tennessee) was established in the Army of the Tennessee. Left Wing XIII Corps (Tennessee) was established in the Army of the Tennessee. November 27 1862: Centre XIII Corps (Tennessee) was established in the Army of the Tennessee.

December 18 1862: Major-General John Alexander McClernand was appointed to command XIII Corps (Tennessee), arriving on December 22 1862.

December 22 1862: Centre XIII Corps (Tennessee) was discontinued, and incorporated into XVII Corps (Tennessee). Left Wing XIII Corps (Tennessee) was discontinued, and incorporated into XVI Corps (Tennessee) and Left Wing XVI Corps (Tennessee). Right Wing XIII Corps (Tennessee) was discontinued, and incorporated into XV Corps (Tennessee). Major-General John Alexander McClernand arrived to command XIII Corps (Tennessee). January 4 1863: XIII Corps (Tennessee) was temporarily discontinued, and renamed unofficially as “I Corps (Mississippi)”. The unofficial “I Corps (Mississippi)” was established in the “Army of the Mississippi” from the forces in XIII Corps (Tennessee).

Right Wing XIII Corps Tennessee

(Established, from XIII Corps (Tennessee), November 1 1862-December 22 1862, discontinued, to XV Corps (Tennessee))

James Birdseye McPherson (November 1 1862-November 27 1862), William Tecumseh Sherman (November 27 1862-December 22 1862)

November 1 1862: Right Wing XIII Corps (Tennessee) was established in the Army of the Tennessee. Major-General James Birdseye McPherson assumed command of Right Wing XIII Corps (Tennessee).

November 27 1862: Major-General William Tecumseh Sherman assumed command of Right Wing XIII Corps (Tennessee), succeeding Major-General James Birdseye McPherson.

December 22 1862: Right Wing XIII Corps (Tennessee) was discontinued, and incorporated into XV Corps (Tennessee).

Left Wing XIII Corps Tennessee

(Established, from XIII Corps Tennessee, November 1 1862-December 22 1862, discontinued, to XVI Corps Tennessee)

Charles Smith Hamilton (November 1 1862-December 22 1862)

November 1 1862: Left Wing XIII Corps (Tennessee) was established in the Army of the Tennessee. Major-General Charles Smith Hamilton assumed command of Left Wing XIII Corps (Tennessee).

December 22 1862: Left Wing XIII Corps (Tennessee) was discontinued, and incorporated into XVI Corps (Tennessee) and Left Wing XVI Corps (Tennessee).

Centre XIII Corps Tennessee

(Established, from XIII Corps (Tennessee), November 27 1862-December 22 1862, discontinued, to XVII Corps (Tennessee))

James Birdseye McPherson (November 27 1862-December 22 1862)

November 27 1862: Centre XIII Corps (Tennessee) was established in the Army of the Tennessee. Major-General James Birdseye McPherson assumed command of Centre XIII Corps (Tennessee).

December 22 1862: Centre XIII Corps (Tennessee) was discontinued, and incorporated into XVII Corps (Tennessee).

XV Corps Tennessee

(Established, from Right Wing XIII Corps Tennessee, December 18 1862-January 4 1863, discontinued, to II Corps Mississippi)

William Tecumseh Sherman (December 18 1862-January 4 1863)

December 18 1862: XV Corps (Tennessee) was designated for the forces taking part in the Yazoo Expedition. Major-General William Tecumseh Sherman was appointed to command XV Corps (Tennessee), arriving on 22nd December 1862.

December 22 1862: XV Corps (Tennessee) was established in the Army of the Tennessee, comprising the former Right Wing XIII Corps (Tennessee). Major-General William Tecumseh Sherman arrived to command of XV Corps (Tennessee).

January 4 1863: XV Corps (Tennessee) was discontinued, and named unofficially as “II Corps (Mississippi)”.

XVI Corps Tennessee

(Established, from Left Wing, XIII Corps Tennessee, December 18 1862-October 16 1863, transferred to Military Division of the Mississippi)

Stephen Augustus Hurlbut (December 18 1862-January 10 1863), Charles Smith Hamilton (temporary January 10 1863-February 5 1863), Stephen Augustus Hurlbut (February 5 1863-October 15 1863), Napoleon Jackson Tecumseh Dana (October 15 1863-October 16 1863)

December 18 1862: XVI Corps (Tennessee) was designated in the Army of the Tennessee. Major-General Stephen Augustus Hurlbut was appointed to command XVI Corps (Tennessee), arriving on December 22 1862.

December 22 1862: XVI Corps (Tennessee) was established in the Army of the Tennessee. Major-General Stephen Augustus Hurlbut assumed command of XVI Corps (Tennessee). Left Wing XVI Corps (Tennessee) was established in the Army of the Tennessee.

January 10 1863: Major-General Charles Smith Hamilton assumed temporary command of XVI Corps (Tennessee), succeeding Major-General Stephen Augustus Hurlbut.

January 20 1863: XVI Corps (Tennessee) was reorganised as an administrative organisation supervising forces in transit and those dispersed around Memphis, La Grange and Corinth.

February 5 1863: Major-General Stephen Augustus Hurlbut assumed command of XVI Corps (Tennessee), succeeding Major-General Charles Smith Hamilton.

October 15 1863: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of XVI Corps (Tennessee), succeeding Major-General Stephen Augustus Hurlbut.

October 16 1863: XVI Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

Left Wing XVI Corps Tennessee

(Established, December 22 1862-October 16 1863, transferred to Military Division of the Mississippi)

Charles Smith Hamilton (December 22 1862-April 1 1863), vacant (April 2 1863-July 6 1863), Grenville Mellen Dodge (July 7 1863), August Mersy (August 7 1863-September 3 1863), Eugene Asa Carr (September 3 1863-September 15 1863), Grenville Mellen Dodge (September 15 1863-October 16 1863)

December 22 1862: Left Wing XVI Corps (Tennessee) was established in the Department of the Tennessee. Major-General Charles Smith Hamilton assumed command of Left Wing XVI Corps (Tennessee).

April 1 1863: Command of Left Wing XVI Corps became vacant.

July 7 1863: Brigadier-General Grenville Mellen Dodge assumed command of Left Wing XVI Corps (Tennessee), filling a vacancy since April 1 1863.

August 7 1863: Colonel August Mersy assumed command of Left Wing XVI Corps (Tennessee), succeeding Major-General Grenville Mellen Dodge.

September 3 1863: Brigadier-General Eugene Asa Carr assumed command of Left Wing XVI Corps (Tennessee), succeeding Colonel August Mersy.

September 15 1863: Brigadier-General Grenville Mellen Dodge assumed command of Left Wing XVI Corps (Tennessee), succeeding Brigadier-General Eugene Asa Carr.

October 16 1863: Left Wing XVI Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

XVII Corps Tennessee

(Established, December 18 1862-October 16 1863, transferred to Military Division of the Mississippi)

James Birdseye McPherson (December 18 1862-October 16 1863)

December 18 1862: XVII Corps (Tennessee) was established in the Army of the Tennessee. Major-General James Birdseye McPherson was appointed to command XVII Corps (Tennessee), arriving on December 22 1862.

December 22 1862: XVII Corps (Tennessee) was established officially in the Army of the Tennessee. Major-General James Birdseye McPherson assumed command of XVII Corps (Tennessee).

October 16 1863: XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

XIII Corps Tennessee

(Established, from I Corps Mississippi, January 12 1863-August 7 1863, transferred to Army of the Gulf)

George Washington Morgan (January 12 1863-January 31 1863), John Alexander McClernand January 31 1863-June 19 1863), Edward Otho Cresap Ord (June 19 1863-July 28 1863), Cadwalader Colden Washburn (July 28 1863-August 7 1863)

January 12 1863: XIII Corps (Tennessee) was established in the Army of the Tennessee, incorporating the unofficial “I Corps (Mississippi)”. Brigadier-General George Washington Morgan assumed command of XIII Corps (Tennessee).

January 31 1863: Major-General John Alexander McClernand assumed command of XIII Corps (Tennessee), succeeding Major-General George Washington Morgan.

June 19 1863: Major-General Edward Otho Cresap Ord assumed command of XIII Corps (Tennessee), succeeding Major-General John Alexander McClernand.

July 28 1863: Major-General Cadwalader Colden Washburn assumed command of XIII Corps (Tennessee), succeeding Major-General Edward Otho Cresap Ord.

August 7 1863: XIII Corps (Tennessee) transferred from the Army of the Tennessee to the Department of the Gulf.

XV Corps Tennessee

(Established, from II Corps Mississippi, January 12 1863-October 16 1863, transferred to Military Division of the Mississippi)

William Tecumseh Sherman (January 12 1863-October 16 1863)

January 12 1863: XV Corps (Tennessee) was established in the Army of the Tennessee, incorporating “II Corps (Mississippi)”. Major-General William Tecumseh Sherman assumed command of XV Corps (Tennessee).

October 16 1863: XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

IX Corps Tennessee

(Transferred, from Army of the Ohio, June 5 1863-August 25 1863, transferred to Department of the Ohio)

John Grubb Parke (June 5 1863-August 25 1863)

June 5 1863: IX Corps (Tennessee) transferred from the Army of the Ohio to the Department of the Tennessee. Major-General John Grubb Parke assumed command of IX Corps (Tennessee), succeeding Brigadier-General Orlando Bolivar Willcox.

August 25 1863: IX Corps (Tennessee) transferred from the Department of the Tennessee to the Army of the Ohio.

Department of the Cumberland

(Established, from District of the Ohio, October 24 1862-October 16 1863, transferred to Military Division of the Mississippi)

William Starke Rosecrans (October 24 1862-October 16 1863)

October 24 1862: The Department of the Cumberland was established, comprising Tennessee east of the Tennessee River (excluding Fort Henry and Fort Donelson and the territory around Cumberland Gap formerly in the District of the Ohio. The portions of Alabama and Georgia were also added to its territory as they came under control. Major-General William Starke Rosecrans was appointed to command the Department of the Cumberland, arriving on October 30 1862. The Army of the Cumberland was established in the Department of the Cumberland.

October 30 1862: Major-General William Starke Rosecrans arrived to command the Department of the Cumberland.

September 25 1863: Hooker’s Command (Cumberland) was established in the Department of the Cumberland, comprising XI Corps (Cumberland) and XII Corps (Cumberland). XI Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland). XII Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland).

October 16 1863: The Department of the Cumberland transferred to the Military Division of the Mississippi. The Army of the Cumberland transferred with the Department of the Cumberland to the Military Division of the Mississippi. Hooker’s Command (Cumberland) transferred with the Department of the Cumberland to the Military Division of the Mississippi. XI Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XII Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XIV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. IV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. Cavalry Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi.

Army of the Cumberland

(Established, October 24 1862-October 16 1863, transferred to Military Division of the Mississippi)

William Starke Rosecrans (October 24 1862-October 16 1863)

October 24 1862: The Army of the Cumberland was established in the Department of the Cumberland. Major-General William Starke Rosecrans assumed command of the Army of the Cumberland. XIV Corps (Cumberland) was established in the Army of the Cumberland, incorporating the former Army of the Ohio. I Corps (Cumberland) was established in the Army of the Cumberland. II Corps (Cumberland) was established in the Army of the Cumberland. III Corps (Cumberland) was established in the Army of the Cumberland. Cavalry Corps (Cumberland) was established in the Army of the Cumberland.

November 5 1862: I Corps (Cumberland) was discontinued, and renamed Right Wing XIV Corps (Cumberland). II Corps (Cumberland) was discontinued, and renamed Left Wing XIV Corps (Cumberland). III Corps (Cumberland) was discontinued, and renamed Centre XIV Corps (Cumberland).

January 9 1863: Centre XIV Corps (Cumberland) was discontinued, and renamed XIV Corps (Cumberland). Right Wing XIV Corps (Cumberland) was discontinued, and renamed XX Corps (Cumberland). XX Corps (Cumberland) was established in the Army of the Cumberland, comprising the former Right Wing XIV Corps (Cumberland). Left Wing XIV Corps (Cumberland) was discontinued, and renamed XXI Corps (Cumberland). XXI Corps (Cumberland) was established in the Army of the Cumberland, comprising forces from Left Wing XIV Corps (Cumberland).

June 8 1863: The “Army of Kentucky”, operating unofficially in the Army of the Cumberland since January 20 1863, was discontinued. Reserve Corps (Cumberland) was established in the Department of the Cumberland, incorporating the former Army of Kentucky.

September 28 1863: IV Corps (Cumberland) was established in the Army of the Cumberland.

October 9 1863: XX Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland). XXI Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland). Reserve Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland).

October 16 1863: The Army of the Cumberland transferred with the Department of the Cumberland to the Military Division of the Mississippi. Hooker’s Command (Cumberland) transferred with the Department of the Cumberland to the Military Division of the Mississippi. XI Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XII Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XIV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. IV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. Cavalry Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi.

I Corps Cumberland

(Established, from I Corps Ohio, October 24 1862-November 5 1862, discontinued, to Right Wing XIV Corps Cumberland)

Alexander McDowell McCook (October 24 1862-November 5 1862)

October 24 1862: I Corps (Cumberland) was established in the Army of the Cumberland incorporating the former I Corps (Ohio). Major-General Alexander McDowell McCook assumed command of I Corps (Cumberland).

November 5 1862: I Corps (Cumberland) was formally discontinued, and renamed Right Wing XIV Corps (Cumberland).

II Corps Cumberland

(Established, from II Corps Ohio, October 24 1862-November 5 1862, discontinued, to Left Wing XIV Corps Cumberland)

Thomas Leonidas Crittenden (October 24 1862-November 5 1862)

October 24 1862: II Corps (Cumberland) was established in the Army of the Cumberland incorporating the former II Corps (Ohio). Major-General Thomas Leonidas Crittenden assumed command of Left Wing XIV Corps (Cumberland).

November 5 1862: II Corps (Cumberland) was formally discontinued, and renamed Left Wing XIV Corps (Cumberland).

 

III Corps Cumberland

(Established, from III Corps Ohio, October 24 1862-November 5 1862, discontinued, to Centre XIV Corps Cumberland)

Charles Champion Gilbert (October 24 1862-November 5 1862)

October 24 1862: III Corps (Cumberland) was established in the Army of the Cumberland incorporating the former III Corps (Ohio). Brigadier-General Charles Champion Gilbert assumed command of Centre XIV Corps (Cumberland).

November 5 1862: III Corps (Cumberland) was discontinued, and renamed Centre XIV Corps (Cumberland).

XIV Corps Cumberland

(Established, from Army of the Ohio, October 24 1862-October 16 1863, transferred to Military Division of the Mississippi)

William Starke Rosecrans (October 24 1862-January 9 1863), George Henry Thomas (January 9 1863-October 16 1863)

October 24 1862: XIV Corps was established in the Army of the Cumberland, comprising the field forces of the former Army of the Ohio. XIV Corps continued to be referred to unofficially as the Army of the Ohio. Major-General William Starke Rosecrans assumed command of XIV Corps (Cumberland).

November 5 1862: I Corps (Cumberland) was discontinued, and renamed Right Wing XIV Corps (Cumberland). II Corps (Cumberland) was discontinued, and renamed Left Wing XIV Corps (Cumberland). III Corps (Cumberland) was discontinued, and renamed Centre XIV Corps (Cumberland). Right Wing XIV Corps (Cumberland) was established in XIV Corps (Cumberland). Left Wing XIV Corps (Cumberland) was established in XIV Corps (Cumberland). Centre XIV Corps (Cumberland) was established in XIV Corps (Cumberland).

January 9 1863: Centre XIV Corps (Cumberland) was discontinued, and renamed XIV Corps (Cumberland). XIV Corps was reorganised in the Army of the Cumberland, comprising forces from Centre XIV Corps (Cumberland). Major-General George Henry Thomas assumed command of XIV Corps (Cumberland).

October 16 1863: XIV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi.

Right Wing XIV Corps Cumberland

(Established, from I Corps Cumberland, November 5 1862-January 9 1863, discontinued, to XX Corps Cumberland)

Alexander McDowell McCook (November 5 1862-January 9 1863)

November 5 1862: Right Wing XIV Corps (Cumberland) was established in the Army of the Cumberland incorporating the former I Corps (Cumberland). Major-General Alexander McDowell McCook retained command of Right Wing XIV Corps (Cumberland).

January 9 1863: Right Wing XIV Corps (Cumberland) was discontinued, and renamed XX Corps (Cumberland). XX Corps (Cumberland) was established in the Army of the Cumberland, comprising forces from Right Wing XIV Corps (Cumberland).

Left Wing XIV Corps Cumberland

(Established, from II Corps Cumberland, November 5 1862-January 9 1863, discontinued, to XXI Corps Cumberland)

Thomas Leonidas Crittenden (November 5 1862-January 9 1863)

November 5 1862: Left Wing XIV Corps (Cumberland) was established in the Army of the Cumberland incorporating the former II Corps (Cumberland). Major-General Thomas Leonidas Crittenden retained command of Left Wing XIV Corps (Cumberland).

January 9 1863: Left Wing XIV Corps (Cumberland) was discontinued, and renamed XXI Corps (Cumberland). XXI Corps (Cumberland) was established in the Army of the Cumberland, comprising forces from Left Wing XIV Corps (Cumberland).

Centre XIV Corps Cumberland

(Established, from III Corps Cumberland, November 5 1862-January 9 1863, discontinued, to XIV Corps Cumberland)

George Henry Thomas (November 5 1862-January 9 1863)

November 5 1862: Centre XIV Corps (Cumberland) was established in the Army of the Cumberland incorporating the former III Corps (Cumberland). Major-General George Henry Thomas assumed command of Centre XIV Corps (Cumberland), succeeding Brigadier-General Charles Champion Gilbert.

January 9 1863: Centre XIV Corps (Cumberland) was discontinued, and renamed XIV Corps (Cumberland). XIV Corps was reorganised in the Army of the Cumberland, comprising forces from Centre XIV Corps (Cumberland).

Cavalry Corps Cumberland

(Established, October 24 1862–October 16 1863, transferred to Military Division of the Mississippi)

John Kennett (October 24 1862-November 24 1862), David Sloane Stanley (November 24 1862-September 9 1863), Robert Byington Mitchell (temporary September 9 1863-October 16 1863)

October 24 1862: Cavalry Corps (Cumberland) was established in the Army of the Cumberland. Colonel John Kennett assumed temporary command of Cavalry Corps (Cumberland).

November 24 1862: Brigadier-General David Sloane Stanley assumed command of Cavalry Corps (Cumberland), succeeding Colonel John Kennett.

September 9 1863: Brigadier-General Robert Byington Mitchell assumed temporary command of Cavalry Corps (Cumberland), succeeding Major-General David Sloane Stanley.

October 16 1863: Cavalry Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi.

XX Corps Cumberland

(Established, from Right Wing XIV Corps Cumberland, January 9 1863-October 9 1863, discontinued, to IV Corps Cumberland)

Alexander McDowell McCook (January 9 1863-October 9 1863)

January 9 1863: XX Corps (Cumberland) was established in the Army of the Cumberland, incorporating Right Wing XIV Corps (Cumberland). Major-General Alexander McDowell McCook assumed command of XX Corps (Cumberland).

October 9 1863: XX Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland).

XXI Corps Cumberland

(Established, from Left Wing XIV Corps Cumberland, January 9 1863-October 9 1863, discontinued, to IV Corps Cumberland)

Thomas Leonidas Crittenden (January 9 1863-February 19 1863), Thomas John Wood (temporary February 19 1863-March 19 1863), Thomas Leonidas Crittenden (March 19 1863-July 15 1863), John McAuley Palmer (temporary July 15 1863-August 17 1863), Thomas Leonidas Crittenden (August 17 1863-October 9 1863)

January 9 1863: XXI Corps (Cumberland) was established in the Army of the Cumberland, incorporating Left Wing XIV Corps (Cumberland). Major-General Thomas Leonidas Crittenden assumed command of XXI Corps (Cumberland).

February 19 1863: Brigadier-General Thomas John Wood assumed command of XXI Corps (Cumberland), succeeding Major-General Thomas Leonidas Crittenden.

March 19 1863: Major-General Thomas Leonidas Crittenden assumed command of XXI Corps (Cumberland), succeeding Brigadier-General Thomas John Wood.

July 15 1863: Major-General John McAuley Palmer assumed temporary command of XXI Corps (Cumberland), succeeding Major-General Thomas Leonidas Crittenden.

August 17 1863: Major-General Thomas Leonidas Crittenden assumed command of XXI Corps (Cumberland), succeeding Major-General John McAuley Palmer.

October 9 1863: XXI Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland).

IV Corps Cumberland

(Established, September 28 1863-October 16 1863, transferred to Military Division of the Mississippi)

Gordon Granger (September 28 1863-October 16 1863)

September 28 1863: IV Corps (Cumberland) was established in the Army of the Cumberland. Major-General Gordon Granger was appointed to command IV Corps (Cumberland), arriving on 10th October.

October 9 1863: XX Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland). XXI Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland). Reserve Corps (Cumberland) was discontinued, and incorporated into IV Corps (Cumberland).

October 10 1863: Major-General Gordon Granger arrived to command IV Corps (Cumberland).

October 16 1863: IV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi.

Hooker’s Command Cumberland

(Established, September 25 1863-October 16 1863, transferred to Military Division of the Mississippi)

Joseph Hooker (September 25 1863-October 16 1863)

September 25 1863: Hooker’s Command (Cumberland) established in the Department of the Cumberland. Major-General Joseph Hooker assumed command of Hooker’s Command (Cumberland). XI Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland). XII Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland).

October 16 1863: Hooker’s Command (Cumberland) transferred with the Department of the Cumberland to the Military Division of the Mississippi.

XI Corps Hooker’s Command Cumberland

(Transferred from Army of the Potomac, September 25 1863-October 16 1863, transferred to Military Division of the Mississippi)

Oliver Otis Howard (September 25 1863-October 16 1863)

September 25 1863: XI Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland). Major-General Oliver Otis Howard retained command of XI Corps (Cumberland).

October 16 1863: XI Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi.

XII Corps Hooker’s Command Cumberland

(Transferred from Army of the Potomac, September 25 1863-October 16 1863, transferred to Military Division of the Mississippi)

Henry Warner Slocum (September 25 1863-October 16 1863)

September 25 1863: XII Corps (Potomac) transferred from the Army of the Potomac to Hooker’s Command (Cumberland. Major-General Henry Warner Slocum retained command of XII Corps (Cumberland).

October 16 1863: XII Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi.

Army of the Mississippi

(Established, from XIII Corps (Tennessee) and XV Corps (Tennessee), January 4 1863-January 12 1863, discontinued, to XIII Corps (Tennessee) and XV Corps (Tennessee))

John Alexander McClernand (January 4 1863-January 12 1863)

January 4 1863: The “Army of the Mississippi” was established unofficially in the Department of the Tennessee. Major-General John Alexander McClernand assumed command of the unofficial “Army of the Mississippi”. XIII Corps (Tennessee) was temporarily discontinued, and renamed unofficially as “I Corps (Mississippi)”. The unofficial “I Corps (Mississippi)” was established in the “Army of the Mississippi” from the forces in XIII Corps (Tennessee). XV Corps (Tennessee) was discontinued, and renamed unofficially as “II Corps (Mississippi)”. The unofficial “II Corps (Mississippi)” was established in the Army “of the Mississippi”.

January 12 1863: The unofficial “Army of the Mississippi” was discontinued, and its forces transferred to the Army of the Tennessee. The unofficial “I Corps (Mississippi)” was discontinued, and re-designated as XIII Corps (Tennessee). The unofficial “II Corps (Mississippi)” was discontinued, and re-designated as XV Corps (Tennessee).

I Corps Mississippi

(Established, from XIII Corps Tennessee, January 4 1863, to January 12 1863, discontinued, to XIII Corps Tennessee)

George Washington Morgan (January 4 1863, to January 12 1863)

January 4 1863: The unofficial “I Corps (Mississippi)” was established in the “Army of the Mississippi” incorporating XIII Corps (Tennessee). Brigadier-General George Washington Morgan assumed command of “I Corps (Mississippi)”.

January 12 1863: The unofficial “I Corps (Mississippi)” was discontinued, and renamed XIII Corps (Tennessee).

II Corps Mississippi

(Established, from XV Corps Tennessee, January 4 1863, to January 12 1863, discontinued, to XV Corps Tennessee)

William Tecumseh Sherman (January 4 1863, to January 12 1863)

January 4 1863: The unofficial “II Corps (Mississippi)” was established in the Army “of the Mississippi” incorporating XV Corps (Tennessee). Major-General William Tecumseh Sherman assumed command of “II Corps (Mississippi)”.

January 12 1863: “II Corps (Mississippi)” was discontinued, and renamed XV Corps (Tennessee).

Military Division of the Mississippi

(Established, October 16 1863-June 27 1865, see Part 4: Post War organisation, June 1865-December 1865)

Ulysses Simpson Grant (October 16 1863-March 18 1864), William Tecumseh Sherman (March 18 1864-June 27 1865)

October 16 1863: The Military Division of the Mississippi was established to comprise the Department of the Ohio, the Department of the Cumberland and the Department of the Tennessee. Major-General Ulysses Simpson Grant was appointed to command the Military Division of the Mississippi, arriving on 18th October 1863. The Department of the Tennessee transferred to the Military Division of the Mississippi. The Department of the Cumberland transferred to the Military Division of the Mississippi. The Department of the Ohio transferred to the Military Division of the Mississippi. The Army of the Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi. The Army of the Cumberland transferred with the Department of the Cumberland to the Military Division of the Mississippi. The Army of the Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of West Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi. The Sub-District of Memphis transferred with the District of West Tennessee in the Department of the Tennessee to the Military Division of the Mississippi. The District of Northeast Louisiana transferred with the Department of the Tennessee to the Military Division of the Mississippi. The District of Eastern Arkansas transferred with the Department of the Tennessee to the Military Division of the Mississippi. Hooker’s Command (Cumberland) transferred with the Department of the Cumberland to the Military Division of the Mississippi. XI Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XII Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. XVI Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Left Wing XVI Corps transferred with XVI Corps (Tennessee) to the Military Division of the Mississippi. XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi. XIV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. IV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. Cavalry Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi.

October 18 1863: Major-General Ulysses Simpson Grant arrived to command the Military Division of the Mississippi.

March 18 1864: Major-General William Tecumseh Sherman assumed command of the Military Division of the Mississippi, succeeding Lieutenant-General Ulysses Simpson Grant.

October 29 1864: Cavalry Corps (Military Division of the Mississippi) was established in the Military Division of the Mississippi.

November 7 1864: The “Army of Georgia” was established unofficially in the Military Division of the Mississippi. XX Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”. XIV Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”.

November 24 1864: The Department of the Tennessee was nominally discontinued, and its territory transferred to the Military Division of the Mississippi; the Department was effectively discontinued from November 28 1864 when its constituent territorial commands transferred to the Department of the Mississippi. Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department. Fort Henry and Fort Donelson transferred from the Department of the Tennessee to the Department of the Cumberland. The Army of the Tennessee transferred from the Department of the Tennessee to the Military Division of the Mississippi.

November 28 1864: The Department of the Tennessee was discontinued. The state of Mississippi and the parts of Tennessee west of the Tennessee River were transferred from the Department of the Tennessee to the Department of the Mississippi. The District of Vicksburg transferred from the Department of the Tennessee to the Department of the Mississippi. The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi. The Sub-District of Memphis was discontinued.

January 17 1865: The Department of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland. The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland.

January 31 1865: The Department of North Carolina was established and transferred to the Military Division of the Mississippi. The District of North Carolina was established in the Department of North Carolina. The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia to the District of North Carolina. Terry’s Provisional Corps (Virginia) transferred from the Department of Virginia to the Department of North Carolina.

February 2 1865: The Army of the Ohio was discontinued, and its field forces transferred to the Department of North Carolina. XXIII Corps transferred with the Army of the Ohio to the Department of North Carolina and continued to be referred to unofficially as the “Army of the Ohio”. The territory around Covington transferred from the Northern Department to the Department of Kentucky.

February 18 1865: Detachment Army of the Tennessee (XVI Corps) was discontinued, and renamed XVI Corps (Gulf) in the Army of the Gulf. March 28 1865: The Army of Georgia was officially established and confirmed, comprising XIV Corps (Georgia) and XX Corps (Georgia).

April 17 1865: Cavalry Corps (Military Division of the Mississippi) was discontinued.

April 19 1865: The parts of North Carolina not occupied by the armies of the Military Division of the Mississippi were transferred from the Department of North Carolina to the Military Division of the James.

June 17 1865: The Army of Georgia was discontinued. XIV Corps (Georgia) transferred from the Army of Georgia to the Military Division of the Mississippi.

June 27 1865: The Department of North Carolina transferred from the Military Division of the Mississippi to the Military Division of the Atlantic.

June 27 1865: The Military Division of the Mississippi was reorganised to consist of the Department of the Ohio, the Department of the Missouri and the Department of Arkansas. The Army of the Cumberland transferred to the Military Division of the Mississippi. The Department of the Cumberland was discontinued. The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee. The District of Middle Tennessee was discontinued.

Department of the Ohio

(Transferred to Military Division of the Mississippi, October 16 1863-January 17 1865, discontinued, to Department of the Cumberland)

Ambrose Everett Burnside (October 16 1863-December 9 1863), John Gray Foster (December 9 1863-January 26 1864 interim February 9 1864), John McAllister Schofield (January 26 1864-November 8 1864 interim November 17 1864), George Stoneman (temporary November 17 1864-January 17 1865)

October 16 1863: The Department of the Ohio transferred to the Military Division of the Mississippi. Major-General Ambrose Everett Burnside retained command of the Department of the Ohio. The District of Eastern Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Western Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Illinois transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. The District of Indiana transferred with the Department of the Ohio to the Military Division of the Mississippi. The Army of the Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi.

November 6 1863: The District of Eastern Kentucky was discontinued, and renamed the Sub-District of Eastern Kentucky in the District of Kentucky. The Sub-District of Eastern Kentucky was established in the District of Kentucky. The Sub-District of North Central Kentucky was established in the District of Kentucky. The Sub-District of Southern Central Kentucky was established in the District of Kentucky. The Sub-District of Somerset was established in the District of Kentucky.

November 16 1863: The territory in eastern Tennessee which was occupied by troops of the Army of the Ohio transferred from the Department of the Cumberland to the Department of the Ohio. The District of Illinois was discontinued. The District of Indiana was discontinued. The District of Ohio was discontinued.

November 21 1863: The District of the Clinch was established in the Department of the Ohio.

December 1 1863: The Sub-District of Eastern Kentucky was discontinued. The Sub-District of North Central Kentucky was discontinued. The Sub-District of South Central Kentucky was discontinued. The Sub-District of Somerset was discontinued.

December 9 1863: Major-General John Gray Foster assumed command of the Department of the Ohio, succeeding Major-General Ambrose Everett Burnside.

December 16 1863: The District of Middle Tennessee was established in the Department of the Ohio.

January 12 1864: The states of Ohio, Michigan, Indiana and Illinois transferred from the Department of the Ohio to the Northern Department.

January 26 1864: Major-General John McAllister Schofield was appointed to command the Department of the Ohio, arriving on 9th February 1864.

February 8 1864: Jeffersonville, Indiana, transferred from the Northern Department to the Department of the Ohio.

February 9 1864: Major-General John McAllister Schofield arrived to command the Department of the Ohio, succeeding Major-General John Gray Foster.

February 14 1864: The District of Middle Tennessee was discontinued.

April 4 1864: The District of the Clinch was discontinued.

April 10 1864: The District of East Tennessee was established in the Department of the Ohio.

The District of Nashville was discontinued, and its territory transferred to the District of Tennessee in the Department of the Cumberland.

June 25 1864: Covington, Kentucky, and the territory surrounding within ten miles transferred from the Department of the Ohio to the Northern Department.

August 10 1864: The portion of Kentucky west of the Tennessee River transferred from the Department of the Tennessee to the Department of the Ohio.

November 8 1864: Major-General George Stoneman was appointed to temporary command of the Department of the Ohio, arriving on November 17 1864, to succeed Major-General John McAllister Schofield.

November 17 1864: Major-General George Stoneman arrived to temporary command of the Department of the Ohio, succeeding Major-General John McAllister Schofield.

January 17 1865: The Department of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland. The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland. The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland.

June 27 1865: The Department of Pennsylvania was discontinued, and its territory incorporated into the Middle Department and the Department of the Ohio. The Military Division of the Mississippi was reorganised to consist of the Department of the Ohio, the Department of the Missouri and the Department of Arkansas.

District of Ohio

(Transferred to Military Division of the Mississippi, October 16 1863-November 16 1863, discontinued)

Jacob Dolson Cox (October 16 1863-November 16 1863)

October 16 1863: The District of Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi. Major-General Jacob Dolson Cox retained command of the District of Ohio.

November 16 1863: The District of Ohio was discontinued.

District of Illinois

(Transferred to Military Division of the Mississippi, October 16 1863-November 16 1863, discontinued)

Jacob Ammen (October 16 1863-November 16 1863)

October 16 1863: The District of Illinois transferred with the Department of the Ohio to the Military Division of the Mississippi. Brigadier-General Jacob Ammen retained command of the District of Illinois.

November 16 1863: The District of Illinois was discontinued.

District of Eastern Kentucky

(Transferred to Military Division of the Mississippi, October 16 1863-November 6 1863, discontinued, to Sub-District of Eastern Kentucky)

George W Gallup (October 16 1863-November 6 1863)

October 16 1863: The District of Eastern Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. Colonel George W Gallup retained command of the District of Eastern Kentucky.

November 6 1863: The District of Eastern Kentucky was discontinued, and renamed as the Sub-District of Eastern Kentucky in the District of Kentucky.

District of Western Kentucky

(Transferred to Military Division of the Mississippi, October 16 1863-March 25 1864), transferred to Department of the Tennessee)

Jeremiah Tilford Boyle (October 16 1863-January 25 1864), vacant (January 26 1864-March 25 1864)

October 16 1863: The District of Western Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. Brigadier-General Jeremiah Tilford Boyle retained command of the District of Western Kentucky.

January 26 1864: Command of the District of Western Kentucky became vacant after the resignation of Brigadier-General Jeremiah Tilford Boyle.

March 25 1864: The District of Western Kentucky transferred from the Department of the Ohio to the Department of the Tennessee.

District of Kentucky

(Transferred to Military Division of the Mississippi, October 16 1863-January 17 1865, transferred to Department of the Cumberland)

Jeremiah Tilford Boyle (October 16 1863-November 6 1863), Jacob Ammen (December 1 1863-February 5 1864), Stephen Gano Burbridge (February 5 1864-April 1 1864), Edward Henry Hobson (April 1 1864April 10 1864), Stephen Gano Burbridge (April 10 1864-January 17 1865)

October 16 1863: The District of Kentucky transferred with the Department of the Ohio to the Military Division of the Mississippi. It comprised the state of Kentucky. Brigadier-General Jeremiah Tilford Boyle retained command of the District of Kentucky.

November 6 1863: The Sub-District of Eastern Kentucky was established in the District of Kentucky. The Sub-District of North Central Kentucky was established in the District of Kentucky. November 6 1863: The District of South Central Kentucky was discontinued, and renamed as the Sub-District of Eastern Kentucky in the District of Kentucky. The Sub-District of Somerset was established in the District of Kentucky

December 1 1863: The Sub-District of Eastern Kentucky was discontinued. The Sub-District of North Central Kentucky was discontinued. The Sub-District of South Central Kentucky was discontinued. The Sub-District of Somerset was discontinued. Brigadier-General Jacob Ammen assumed command of the District of Kentucky, succeeding Brigadier-General Jeremiah Tilford Boyle.

February 5 1864: Brigadier-General Stephen Gano Burbridge assumed command of the District of Kentucky, succeeding Brigadier-General Jacob Ammen.

April 1 1864: Brigadier-General Edward Henry Hobson assumed command of the District of Kentucky, succeeding Brigadier-General Stephen Gano Burbridge.

April 10 1864: Brigadier-General Stephen Gano Burbridge assumed command of the District of Kentucky, succeeding Brigadier-General Edward Henry Hobson.

January 17 1865: The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland.

Sub-District of Eastern Kentucky

(Transferred from District of Eastern Kentucky, November 6 1863-December 1 1863, discontinued)

George W Gallup (November 6 1863-December 1 1863)

November 6 1863: The Sub-District of Eastern Kentucky was established in the District of Kentucky, comprising the renamed District of Eastern Kentucky. Colonel George W Gallup retained command of the Sub-District of Eastern Kentucky.

December 1 1863: Sub-District of Eastern Kentucky was discontinued.

Sub-District of North Central Kentucky

(Established, November 6 1863-December 1 1863, discontinued)

Speed Smith Fry (November 6 1863-December 1 1863)

November 6 1863: The Sub-District of North Central Kentucky was established in the District of Kentucky, comprising the territory around Camp Nelson, Kentucky. Brigadier-General Speed Smith Fry assumed command of the Sub-District of North Central Kentucky.

December 1 1863: The Sub-District of North Central Kentucky was discontinued.

Sub-District of South Central Kentucky

(Established, November 6 1863-December 1 1863, discontinued)

Edward Henry Hobson (November 6 1863-December 1 1863)

November 6 1863: The Sub-District of Southern Central Kentucky was established in the District of Kentucky, comprising the vicinity of Munfordville, Kentucky. Brigadier-General Edward Henry Hobson assumed command of the Sub-District of Southern Central Kentucky.

December 1 1863: The Sub-District of South Central Kentucky was discontinued.

Sub-District of Somerset

(Established, November 6 1863-December 1 1863, discontinued)

Theophilus Toulmin Garrard (November 6 1863-December 1 1863)

November 6 1863: The Sub-District of Somerset was established in the District of Kentucky, comprising the vicinity of Somerset, Kentucky. Brigadier-General Theophilus Toulmin Garrard assumed command of the Sub-District of Somerset.

December 1 1863: The Sub-District of Somerset was discontinued.

District of Indiana

(Transferred to Military Division of the Mississippi, October 16 1863-November 16 1863, discontinued)

John Smith Simonson (October 16 1863-November 16 1863)

October 16 1863: The District of Indiana transferred with the Department of the Ohio to the Military Division of the Mississippi. Colonel John Smith Simonson retained command of the District of Indiana.

November 16 1863: The District of Indiana was discontinued.

District of the Clinch

(Established, November 21 1863-April 4 1864, discontinued)

Orlando Bolivar Willcox (November 24 1863-January 17 1864), Theophilus Toulmin Garrard (January 17 1864-April 4 1864)

November 21 1863: The District of the Clinch was established in the Department of the Ohio, comprising comprised the vicinity of Cumberland Gap. Brigadier-General Orlando Bolivar Willcox assumed command of the District of the Clinch.

January 17 1864: Brigadier-General Theophilus Toulmin Garrard assumed command of the District of the Clinch, succeeding Brigadier-General Orlando Bolivar Willcox.

April 4 1864: The District of the Clinch was discontinued.

District of Middle Tennessee

(Established, December 16 1863-February 14 1864, discontinued)

Jacob Ammen (December 16 1863-February 14 1864)

December 16 1863: The District of Middle Tennessee was established in the Department of the Ohio, comprising parts of Kentucky and Tennessee south of the Cumberland River and between the roads from Carthage, to Clinton, Tennessee and thence to Point Isabel, Kentucky. Brigadier-General Jacob Ammen assumed command of the District of Middle Tennessee.

February 14 1864: The District of Middle Tennessee was discontinued.

District of East Tennessee

(Established, April 10 1864-January 17 1865, transferred to Department of the Cumberland)

Jacob Ammen (April 10 1864-January 3 1865), vacant (January 4 1865-January 17 1865)

April 10 1864: The District of East Tennessee was established in the Department of the Ohio, comprising the territory around Knoxville, Tennessee. Brigadier-General Jacob Ammen assumed command of the District of East Tennessee.

January 4 1865: Command of the District of East Tennessee became vacant.

January 17 1865: The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland.

Army of the Ohio

(Transferred to Military Division of the Mississippi, October 16 1863-January 15 1865, transferred to Military Division of the Mississippi)

Ambrose Everett Burnside October 16 1863-December 9 1864), John Gray Foster (December 9 1864-February 9 1864), John McAllister Schofield (February 9 1864May 5 1864), Jacob Dolson Cox (temporary May 5 1864-May 28 1864), John McAllister Schofield (May 28 1864-January 15 1865)

October 16 1863: The Army of the Ohio transferred with the Department of the Ohio to the Military Division of the Mississippi. Major-General Ambrose Everett Burnside retained command of the Army of the Ohio.

November 30 1863: Cavalry Corps (Ohio) was established in the Army of the Ohio.

December 9 1863: Major-General John Gray Foster assumed command of the Army of the Ohio, succeeding Major-General Ambrose Everett Burnside.

February 9 1864: Major-General John McAllister Schofield assumed command of the Army of the Ohio, succeeding Major-General John Gray Foster.

April 10 1864: Cavalry Corps (Ohio) was discontinued.

April 13 1864: IX Corps (Ohio) transferred from the Army of the Ohio to the Department of the Potomac.

May 5 1864: Brigadier-General Jacob Dolson Cox assumed temporary command of the Army of the Ohio, succeeding Major-General John McAllister Schofield.

May 28 1864: Major-General John McAllister Schofield assumed command of the Army of the Ohio, succeeding Brigadier-General Jacob Dolson Cox.

January 15 1865: The Army of the Ohio transferred from the Department of the Ohio and transferred directly to the Military Division of the Mississippi.

 

IX Corps Ohio

(Transferred to Military Division of the Mississippi, October 16 1863-April 13 1864, transferred to Department of the Potomac)

Ambrose Everett Burnside (October 16 1863-January 17 1864), Orlando Bolivar Willcox (temporary January 17 1864-January 26 1864), John Grubb Parke (January 26 1864-March 16 1864), Orlando Bolivar Willcox (temporary March 16 1864-March 19 1864), John Grubb Parke (March 19 1864-April 13 1864)

October 16 1863: IX Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi. Major-General Ambrose Everett Burnside retained command of IX Corps (Ohio).

January 17 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Ohio), succeeding Major-General Ambrose Everett Burnside.

January 26 1864: Major-General John Grubb Parke assumed command of IX Corps (Ohio), succeeding Brigadier-General Orlando Bolivar Willcox.

March 16 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps (Ohio), succeeding Major-General John Grubb Parke.

March 19 1864: Major-Genera John Grubb Parke assumed command of IX Corps (Ohio), succeeding Brigadier-General Orlando Bolivar Willcox.

April 13 1864: IX Corps (Ohio) transferred from the Army of the Ohio to the Department of the Potomac.

XXIII Corps Ohio

(Transferred to Military Division of the Mississippi, October 16 1863-January 15 1865, transferred to Military Division of the Mississippi)

Mahlon Dickerson Manson (October 16 1863-December 2 1863), Jacob Dolson Cox (December 2 1863-February 10 1864), George Stoneman (February 10 1864-April 4 1864 interim April 9 1864), John McAllister Schofield (April 4 1864-May 26 1864), Jacob Dolson Cox (temporary May 26 1864-May 28 1864), John McAllister Schofield (May 28 1864-September 14 1864), Jacob Dolson Cox (temporary September 14 1864-October 22 1864), John McAllister Schofield (October 22 1864-January 15 1865)

October 16 1863: XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi. Brigadier-General Mahlon Dickerson Manson retained command of XXIII Corps (Ohio).

December 2 1863: Brigadier-General Jacob Dolson Cox assumed command of XXIII Corps (Ohio), succeeding Brigadier-General Mahlon Dickerson Manson.

February 10 1864: Major-General George Stoneman assumed command of XXIII Corps (Ohio), succeeding Brigadier-General Jacob Dolson Cox.

April 4 1864: Major-General John McAllister Schofield was appointed to command XXIII Corps (Ohio), arriving on 9th April 1864.

April 9 1864: Major-General John McAllister Schofield arrived to command XXIII Corps (Ohio), succeeding Major-General George Stoneman.

May 26 1864: Brigadier-General Jacob Dolson Cox assumed temporary command of XXIII Corps (Ohio), succeeding Major-General John McAllister Schofield.

May 28 1864: Major-General John McAllister Schofield assumed command of XXIII Corps (Ohio), succeeding Brigadier-General Jacob Dolson Cox.

September 14 1864: Brigadier-General Jacob Dolson Cox assumed temporary command of XXIII Corps (Ohio), succeeding Major-General John McAllister Schofield.

October 22 1864: Major-General John McAllister Schofield assumed command of XXIII Corps (Ohio), succeeding Brigadier-General Jacob Dolson Cox.

January 15 1865: XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi.

Cavalry Corps Ohio

(Established, November 30 1863-April 10 1864, discontinued)

James Murrell Shackelford (November 30 1863-December 15 1863), Samuel Davis Sturgis (December 15 1863-April 10 1864)

November 30 1863: Cavalry Corps (Ohio) was established in the Army of the Ohio. Brigadier-General James Murrell Shackelford assumed command of Cavalry Corps (Ohio).

December 15 1863: Samuel Davis Sturgis assumed command of Cavalry Corps (Ohio), succeeding Brigadier-General James Murrell Shackelford.

April 10 1864: Cavalry Corps (Ohio) was discontinued.

Department of the Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-June 27 1865, discontinued)

William Starke Rosecrans (October 16 1863-October 17 1863 interim October 20 1863), George Henry Thomas (October 17 1863-June 27 1865)

October 16 1863: The Department of the Cumberland transferred to the Military Division of the Mississippi. Major-General William Starke Rosecrans retained command of the Department of the Cumberland. The Army of the Cumberland transferred with the Department of the Cumberland to the Military Division of the Mississippi. Hooker’s Command (Cumberland) transferred with the Department of the Cumberland to the Military Division of the Mississippi.

October 17 1863: Major-General George Henry Thomas was appointed to command the Department of the Cumberland, arriving on October 20th 1863.

November 10 1863: The District of Nashville was established in the Department of the Cumberland. November 16 1863: The territory in eastern Tennessee which was occupied by troops of the Army of the Ohio transferred from the Department of the Cumberland to the Department of the Ohio.

November 24 1863: Fort Henry and Fort Donelson were transferred from the Department of the Tennessee to the Department of the Cumberland.

April 14 1864: Hooker’s Command (Cumberland) was discontinued, and its force incorporated into the reorganised XX Corps (Cumberland).

May 30 1864: The District of Nashville was discontinued, and its territory transferred to the District of Tennessee. The District of Tennessee was established in the Department of the Cumberland.

June 2 1864: The District of Northern Alabama was established in the Department of the Cumberland.

June 15 1864: The District of Etowah was established in the Department of the Cumberland.

November 24 1864: Fort Henry and Fort Donelson were transferred from the Department of the Tennessee to the Department of the Cumberland.

January 17 1865: The Department of the Ohio was discontinued, and its territory annexed to the Department of the Cumberland. The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland. The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland. The territories of Georgia, Alabama and Mississippi controlled by the Army of the Cumberland were transferred from the Department of the Mississippi to the Department of the Cumberland.

February 10 1865: The District of Kentucky was discontinued, and its territory incorporated into the Department of Kentucky.

February 10 1865: The District of West Tennessee transferred from the Department of the Mississippi to the Department of the Cumberland.

February 28 1865: The District of Tennessee was discontinued, and its territory transferred to the District of Middle Tennessee. The District of Middle Tennessee was established in the Department of the Cumberland.

March 17 1865: The District of East Tennessee was discontinued.

May 17 1865: The parts of Mississippi and Alabama previously occupied by the Army of the Cumberland and temporarily controlled by the Department of the Cumberland were transferred to the Department of the Gulf.

May 25 1865: The District of West Tennessee was discontinued.

June 20 1865: The District of Etowah was discontinued.

June 27 18665: The Department of the Cumberland was discontinued. The Army of the Cumberland transferred from the Department of the Cumberland to the Military Division of the Mississippi. The District of Northern Alabama transferred from the Department of the Cumberland to the Department of Alabama. The District of Middle Tennessee was discontinued.

District of Nashville

(Established, November 10 1863-May 30 1864, discontinued, to District of Tennessee)

Lovell Harrison Rousseau (November 10 1863-May 30 1864)

November 10 1863: The District of Nashville was established in the Department of the Cumberland. It included the defences of the Louisville & Nashville Railroad, the Nashville & Northwestern Railroad, the Nashville & Chattanooga Railroad as far as the Duck River, the Nashville & Columbia Railroad and Nashville, Clarksville, McMinnville and Fort Donelson. Major-General Lovell Harrison Rousseau assumed command of the District of Nashville.

May 30 1864: The District of Nashville was discontinued, and its territory transferred to the District of Tennessee.

District of Tennessee

(Established, from District of Nashville, May 30 1864-February 28 1865, discontinued, to District of Middle Tennessee)

Lovell Harrison Rousseau (May 30 1864-February 28 1865)

May 30 1864: The District of Tennessee was established in the Department of the Cumberland, comprising the Defences of Louisville & Nashville Railroad, the Nashville & Northwestern Railroad and Nashville, Tennessee. Major-General Lovell Harrison Rousseau assumed command of the District of Tennessee.

February 28 1865: The District of Tennessee was discontinued, and its territory transferred to the District of Middle Tennessee.

District of Northern Alabama

(Established, June 2 1864 June 27 1865, transferred to Department of Alabama)

Robert Seamen Granger (June 2 1864 June 27 1865)

June 2 1864: The District of Northern Alabama was established in the Department of the Cumberland, comprising the vicinity of Decatur, Huntsville and Stevenson, Alabama, and Pulaski in Tennessee. Brigadier-General Robert Seamen Granger assumed command of the District of Northern Alabama.

June 27 1865: The District of Northern Alabama transferred to the Department of Alabama.

District of Etowah

(Established, June 15 1864-June 20 1865, discontinued)

James Blair Steedman (June 15 1864-November 29 1864), Thomas Francis Meagher (November 29 1864-January 5 1865), James Blair Steedman (January 5 1865-June 20 1865)

June 15 1864: The District of Etowah was established in the Department of the Cumberland, comprising the vicinity of Bridgeport in Alabama, Cleveland and Chattanooga in Tennessee and Rome and Allatoona in Georgia. Major-General James Blair Steedman assumed command of the District of Etowah.

November 29 1864: Brigadier-General Thomas Francis Meagher assumed command of the District of Etowah, succeeding Major-General James Blair Steedman.

January 5 1865: Major-General James Blair Steedman assumed command of the District of Etowah, succeeding Brigadier-General Thomas Francis Meagher.

June 20 1865: The District of Etowah was discontinued.

District of East Tennessee

(Transferred from Department of the Ohio, January 17 1865-March 17 1865, discontinued)

Davis Tillson (January 17 1865-March 9 1865), George Stoneman (March 9 1865-March 17 1865)

January 17 1865: The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland. It encompassed the vicinity of Knoxville, Tennessee. Brigadier-General Davis Tillson assumed command of the District of East Tennessee, succeeding Brigadier-General Jacob Ammen.

March 9 1865: Major-General George Stoneman assumed command of the District of East Tennessee, succeeding Brigadier-General Davis Tillson.

March 17 1865: The District of East Tennessee was discontinued.

District of Kentucky

(Transferred from Department of the Ohio, January 17 1865-February 10 1865, discontinued, to Department of Kentucky)

Stephen Gano Burbridge (January 17 1865-February 10 1865)

January 17 1865: The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland. It comprised the state of Kentucky. Brigadier-General Stephen Gano Burbridge retained command of the District of Kentucky.

February 10 1865: The District of Kentucky was discontinued, and its territory incorporated into the Department of Kentucky.

District of West Tennessee

(Transferred from Department of the Mississippi, February 10 1865-May 25 1865, discontinued)

Benjamin Stone Roberts (February 10 1865-March 4 1865), Cadwallader Colden Washburn (March 4 1865-May 25 1865)

February 10 1865: The District of West Tennessee transferred from the Department of the Mississippi to the Department of the Cumberland. It comprised the territory of Tennessee west of the Tennessee River. Brigadier-General Benjamin Stone Roberts retained command of the District of West Tennessee.

March 4 1865: Major-General Cadwallader Colden Washburn assumed command of the District of West Tennessee, succeeding Brigadier-General Benjamin Stone Roberts.

May 25 1865: The District of West Tennessee was discontinued.

District of Middle Tennessee

(Established, from District of Tennessee, February 28 1865-June 27 1865, discontinued)

Lovell Harrison Rousseau (February 28 1865-June 27 1865)

February 28 1865: The District of Middle Tennessee was established in the Department of the Cumberland, comprising the region of Middle Tennessee, including Murfreesboro, Tullahoma, Decherd, Kingston Springs, Hartsville, Carthage, Clarksville and Nashville Tennessee, and Athens and Bridgeport, Alabama. Major-General Lovell Harrison Rousseau assumed command of the District of Middle Tennessee.

June 27 1865: The District of Middle Tennessee was discontinued.

Army of the Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-June 27 1865, transferred to Military Division of the Mississippi)

William Starke Rosecrans (October 16 1863-October 19 1863), George Henry Thomas (October 19 1863-June 27 1865)

October 16 1863: The Army of the Cumberland transferred with the Department of the Cumberland to the Military Division of the Mississippi. Major-General William Starke Rosecrans retained command of the Army of the Cumberland.

October 19 1863: Major-General George Henry Thomas assumed command of the Army of the Cumberland, succeeding Major-General William Starke Rosecrans.

April 14 1864: Hooker’s Command (Cumberland) was discontinued, and its force incorporated into XX Corps (Cumberland). XI Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland). XII Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland). XX Corps (Cumberland) was established in the Army of the Cumberland. Major-General Joseph Hooker assumed command of XX Corps (Cumberland).

October 29 1864: Cavalry Corps (Cumberland) was discontinued.

November 7 1864: XX Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”. XIV Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”.

January 17 2865: The territories of Georgia, Alabama and Mississippi controlled by the Army of the Cumberland were transferred from the Department of the Mississippi to the Department of the Cumberland.

April 1 1865: IV Corps (Cumberland) was discontinued.

May 17 1865: The parts of Mississippi and Alabama previously occupied by the Army of the Cumberland and temporarily controlled by the Department of the Cumberland were transferred to the Department of the Gulf.

June 27 1865: The Army of the Cumberland transferred to the Military Division of the Mississippi.

IV Corps Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-April 1 1865, discontinued)

Gordon Granger (October 16 1863-April 10 1864), Oliver Otis Howard (April 10 1864-July 27 1864), David Sloane Stanley (July 27 1864-December 1 1864), Thomas John Wood (temporary December 1 1864-January 31 1865), David Sloane Stanley (January 31 1865-April 1 1865)

October 16 1863: IV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. Major-General Gordon Granger retained command of IV Corps (Cumberland).

April 10 1864: Major-General Oliver Otis Howard assumed command of IV Corps (Cumberland), succeeding Major-General Gordon Granger.

July 27 1864: Major-General David Sloane Stanley assumed command of IV Corps (Cumberland), succeeding Major-General Oliver Otis Howard.

December 1 1864: Brigadier-General Thomas John Wood assumed temporary command of IV Corps (Cumberland), succeeding Major-General David Sloane Stanley.

January 31 1865: Major-General David Sloane Stanley assumed command of IV Corps (Cumberland), succeeding Major-General Thomas John Wood.

April 1 1865: IV Corps (Cumberland) was discontinued.

XIV Corps Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-November 7 1864, transferred to Army of Georgia)

George Henry Thomas (October 16 1863-October 28 1863), John McAuley Palmer (October 28 1863-August 7 1864), Richard William Johnson (temporary August 7 1864-August 24 1864), Jefferson Columbus Davis (August 24 19864-November 7 1864)

October 16 1863: XIV Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. Major-General George Henry Thomas retained command of XIV Corps (Cumberland).

October 28 1863: Major-General John McAuley Palmer assumed command of XIV Corps (Cumberland), succeeding Major-General George Henry Thomas.

August 7 1864: Brigadier-General Richard William Johnson assumed temporary command of XIV Corps (Cumberland), succeeding Major-General John McAuley Palmer.

August 24 1864: Brigadier-General Jefferson Columbus Davis assumed command of XIV Corps (Cumberland), succeeding Brigadier-General Richard William Johnson.

November 7 1864: November 7 1864: XIV Corps (Cumberland) transferred to the “Army of Georgia”.

XX Corps Cumberland

(Transferred from Hooker’s Command Cumberland, April 14 1864-November 7 1864, transferred to Army of Georgia)

Joseph Hooker (April 14 1864-July 28 1864), Alpheus Starkey Williams (interim July 28 1864-August 28 1864), Henry Warner Slocum (August 28 1864-November 7 1864)

April 14 1864: XI Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland). XII Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland). XX Corps (Cumberland) was established in the Army of the Cumberland. Major-General Joseph Hooker assumed command of XX Corps (Cumberland).

July 28 1864: Major-General Henry Warner Slocum was appointed to command XX Corps (Cumberland), arriving on 27th August 1864, to succeed Major-General Joseph Hooker. Brigadier-General Alpheus Starkey Williams assumed interim command of XX Corps (Cumberland), succeeding Major-General Joseph Hooker.

August 28 1864: Major-General Henry Warner Slocum arrived to command XX Corps (Cumberland), succeeding Brigadier-General Alpheus Starkey Williams.

November 7 1864: XX Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”.

Cavalry Corps Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-October 29 1864, discontinued, to Cavalry Corps Mississippi)

Robert Byington Mitchell (temporary October 16 1863-November 9 1863), David Sloane Stanley (November 9 1863-November 20 1863), Washington Lafayette Elliott (November 20 1863-August 19 1864), Richard William Johnson (temporary August 19 1864-September 9 1864), Washington Lafayette Elliott (September 9 1864-October 29 1864)

October 16 1863: Cavalry Corps (Cumberland) transferred with the Army of the Cumberland to the Military Division of the Mississippi. Brigadier-General Robert Byington Mitchell retained temporary command of Cavalry Corps (Cumberland).

November 9 1863: Major-General David Sloane Stanley assumed command of Cavalry Corps (Cumberland), succeeding Brigadier-General Richard William Johnson.

November 20 1863: Brigadier-General Washington Lafayette Elliott assumed command of Cavalry Corps Cumberland, succeeding Major-General David Sloane Stanley.

August 19 1864: Brigadier-General Richard William Johnson assumed temporary command of Cavalry Corps (Cumberland), succeeding Brigadier-General Washington Lafayette Elliott.

September 9 1864: Brigadier-General Washington Lafayette Elliott assumed command of Cavalry Corps (Cumberland), succeeding Brigadier-General Richard William Johnson.

October 29 1864: Cavalry Corps (Cumberland) was discontinued.

Hooker’s Command Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-April 14 1864, discontinued to XX Corps Cumberland)

Joseph Hooker (October 16 1863-April 14 1864)

October 15 1863: Hooker’s Command (Cumberland) transferred with the Department of the Cumberland to the Military Division of the Mississippi. Major-General Joseph Hooker retained command of Hooker’s Command (Cumberland). XI Corps (Hooker’s Command Cumberland) transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. XII Corps (Hooker’s Command Cumberland) transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi.

April 14 1864: Hooker’s Command (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland). XI Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland). XII Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland).

XI Corps Hooker’s Command Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-April 14 1864, discontinued, to XX Corps (Cumberland))

Oliver Otis Howard (October 16 1863-January 21 1864), Carl Schurz (temporary January 21 1864-February 25 1864), Oliver Otis Howard (February 25 1864-April 14 1864)

October 16 1863: XI Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. Major-General Oliver Otis Howard retained command of XI Corps (Cumberland).

January 21 1864: Brigadier-General Carl Schurz assumed temporary command of XI Corps (Cumberland), succeeding Major-General Oliver Otis Howard.

February 25 1864: Major-General Oliver Otis Howard assumed command of XI Corps (Cumberland), succeeding Major-General Carl Schurz.

April 14 1864: XI Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland).

XII Corps Hooker’s Command Cumberland

(Transferred to Military Division of the Mississippi, October 16 1863-April 14 1864, discontinued, to XX Corps (Cumberland))

Henry Warner Slocum (October 16 1863-April 14 1864)

October 16 1863: XII Corps (Hooker’s Command Cumberland transferred with Hooker’s Command (Cumberland) to the Military Division of the Mississippi. Major-General Henry Warner Slocum assumed command of XII Corps (Potomac).

April 14 1864: XII Corps (Cumberland) was discontinued, and its forces incorporated into XX Corps (Cumberland).

Department of the Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863-November 28 1864, discontinued, to Department of the Mississippi)

Ulysses Simpson Grant (interim October 16 1863-October 26 1863), William Tecumseh Sherman (October 16 1863-March 11 1864 interim March 26 1864), Joseph Birdseye McPherson (March 11 1864-July 2 1864), John Alexander Logan (temporary July 2 1864-July 27 1864 interim July 30 1864), Oliver Otis Howard (July 27 1864-November 28 1864)

October 16 1863: The Department of the Tennessee transferred to the Military Division of the Mississippi. Major-General William Ulysses Simpson Grant retained command of the Department of the Tennessee. The District of West Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi. The Sub-District of Memphis transferred with the District of West Tennessee in the Department of the Tennessee to the Military Division of the Mississippi. The District of Northeast Louisiana transferred with the Department of the Tennessee to the Military Division of the Mississippi. The District of Eastern Arkansas transferred with the Department of the Tennessee to the Military Division of the Mississippi. The Army of the Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi.

October 16 1863: Major-General William Tecumseh Sherman was appointed to command the Department of the Tennessee, arriving on 26th October 1863.

October 26 1863: Major-General William Tecumseh Sherman arrived to command the Department of the Tennessee, succeeding Major-General Ulysses Simpson Grant.

November 24 1863: Fort Henry and Fort Donelson were transferred from the Department of the Tennessee to the Department of the Cumberland.

January 6 1864: The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas.

January 12 1864: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.

January 25 1864: Cairo, Illinois, transferred from the Northern Department to the District of Cairo in the Department of the Tennessee. The District of Cairo was established in the Department of the Tennessee, comprising the vicinity of Cairo, Illinois.

February 7 1864: The District of Northeast Louisiana was discontinued in the Department of the Tennessee.

March 11 1864: Major-General Joseph Birdseye McPherson was appointed to command the Department of the Tennessee, arriving on 26th March 1864, to succeed Major-General William Tecumseh Sherman.

March 26 1864: Major-General James Birdseye McPherson arrived to command the Department of the Tennessee, succeeding Major-General William Tecumseh Sherman.

April 20 1864: The District of Vicksburg was established in the Department of the Tennessee.

July 2 1864: Major-General John Alexander Logan assumed temporary command of the Department of the Tennessee, succeeding Major-General James Birdseye McPherson.

July 27 1864: Major-General Oliver Otis Howard was appointed to command the Department of the Tennessee, arriving on 30th July 1864, to succeed Major-General John Alexander Logan.

July 20 1864: Major-General Oliver Otis Howard arrived to command the Department of the Tennessee, succeeding Major-General John Alexander Logan.

August 10 1864: The portion of Kentucky west of the Tennessee River transferred from the Department of the Tennessee to the Department of the Ohio.

September 11 1864: The District of Western Kentucky was discontinued.

November 24 1864: The Department of the Tennessee was nominally discontinued, and its territory transferred to the Military Division of the Mississippi; the Department was effectively discontinued from November 28 1864 when its constituent territorial commands transferred to a new Department of the Mississippi. Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department. Fort Henry and Fort Donelson were transferred from the Department of the Tennessee to the Department of the Cumberland. The Army of the Tennessee transferred from the Department of the Tennessee to the Military Division of the Mississippi.

November 28 1864: The Department of the Tennessee was formally discontinued. The District of Vicksburg transferred from the Department of the Tennessee to the Department of the Mississippi. The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi. The Sub-District of Memphis was discontinued.

District of West Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863– November 28 1864, transferred to Department of the Mississippi)

Stephen Augustus Hurlbut (October 16 1863-April 28 1864), Cadwallader Colden Washburn (April 28 1864-June 2 1864), Benjamin Henry Grierson (June 2 1864-November 28 1864)

October 16 1863: The District of West Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi. Major-General Stephen Augustus Hurlbut retained command of the District of West Tennessee.

April 28 1864: Major-General Cadwallader Colden Washburn assumed command of the District of West Tennessee, succeeding Major-General Stephen Augustus Hurlbut.

June 2 1864: Brigadier-General Benjamin Henry Grierson assumed command of the District of West Tennessee, succeeding Brigadier-General Cadwallader Colden Washburn.

November 28 1864: The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi. The Sub-District of Memphis was discontinued.

Sub-District of Memphis

(Transferred to Military Division of the Mississippi, October 16 1863– November 28 1864, discontinued)

James Clifford Veatch (October 16 1863-January 25 1864), Ralph Pomeroy Buckland (January 25 1864-November 28 1864)

October 16 1863: The Sub-District of Memphis transferred with the District of West Tennessee in the Department of the Tennessee to the Military Division of the Mississippi. Brigadier-General James Clifford Veatch retained command of the Sub-District of Memphis.

January 25 1864: Brigadier-General Ralph Pomeroy Buckland assumed command of the Sub-District of Memphis, succeeding Brigadier-General James Clifford Veatch.

November 28 1864: The Sub-District of Memphis was discontinued.

District of Eastern Arkansas

(Transferred to Military Division of the Mississippi, October 16 1863-January 6 1864, transferred to Department of Arkansas)

Napoleon Bonaparte Buford (October 16 1863-January 6 1864)

October 16 1863: The District of Eastern Arkansas transferred with the Department of the Tennessee to the Military Division of the Mississippi. Brigadier-General Napoleon Bonaparte Buford retained command of the District of Eastern Arkansas.

January 6 1864: The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas.

District of Northeast Louisiana

(Transferred to Military Division of the Mississippi, October 16 1863-February 7 1864, discontinued)

John Parker Hawkins (October 16 1863-February 7 1864)

October 16 1863: The District of Northeast Louisiana transferred with the Department of the Tennessee to the Military Division of the Mississippi. Brigadier-General John Parker Hawkins retained command of the District of Northeast Louisiana.

February 7 1864: The District of Northeast Louisiana was discontinued.

District of Cairo

(Transferred from Northern Department, January 25 1864-May 1 1864, discontinued)

Hugh Thompson Reid (January 25 1864-March 19 1864), Mason Brayman (March 19 1864-April 29 18640, Henry Prince (April 29 1864-May 1 1864)

January 25 1864: Cairo, Illinois, transferred from the Northern Department to the District of Cairo in the Department of the Tennessee. The District of Cairo was established in the Department of the Tennessee, comprising the vicinity of Cairo, Illinois. Brigadier-General Hugh Thompson Reid assumed command of the District of Cairo.

March 19 1864: Brigadier-General Mason Brayman assumed command of the District of Cairo, succeeding Brigadier-General Hugh Thompson Reid.

April 29 1864: Brigadier-General Henry Prince assumed command of the District of Cairo, succeeding Brigadier-General Mason Brayman.

May 1 1864: The District of Cairo was discontinued.

District of Western Kentucky

(Transferred from Department of the Ohio, March 25 1864-September 11 1864, discontinued)

Horatio Gouverneur Wright (March 25 1864-April 4 1864), Eleazar Arthur Paine (April 4 1864-September 11 1864)

March 25 1864: The District of Western Kentucky transferred from the Department of the Ohio to the Department of the Tennessee. Brigadier-General Horatio Gouverneur Wright assumed command of the District of Western Kentucky, following a vacancy.

April 4 1864: Brigadier-General Eleazer Arthur Paine assumed command of the District of Western Kentucky, succeeding Brigadier-General Horatio Gouverneur Wright.

September 11 1864: The District of Western Kentucky was discontinued.

District of Vicksburg

(Established, April 20 1864-November 28 1864, transferred to Department of the Mississippi)

Henry Warner Slocum (April 20 1864-August 19 1864), Napoleon Jackson Tecumseh Dana (August 19 1864-September 27 1864), Morgan Lewis Smith (September 27 1864-November 28 1864)

April 20 1864: The District of Vicksburg was established in the Department of the Tennessee, extending from the mouths of the Arkansas and Tallahatchie Rivers along the Mississippi to the boundary of the Department of the Gulf. Major-General Henry Warner Slocum assumed command of the District of Vicksburg.

August 19 1864: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of the District of Vicksburg, succeeding Major-General Henry Warner Slocum.

September 27 1864: Major-General Morgan Lewis Smith assumed command of the District of Vicksburg, succeeding Major-General Napoleon Jackson Tecumseh Dana.

November 28 1864: The District of Vicksburg transferred from the Department of the Tennessee to the Department of the Mississippi.

Army of the Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863-November 24 1864, transferred to Military Division of the Mississippi)

Ulysses Simpson Grant (October 16 1863-October 24 1863), William Tecumseh Sherman (October 24 1863March 26 1864), James Birdseye McPherson (March 26 1864-July 22 1864), John Alexander Logan (temporary July 22 1864-July 27 1864), Oliver Otis Howard (July 27 1864-November 24 1864)

October 16 1863: The Army of the Tennessee transferred with the Department of the Tennessee to the Military Division of the Mississippi. Major-General Ulysses Simpson Grant retained command of the Army of the Tennessee.

October 24 1863: Major-General William Tecumseh Sherman assumed command of the Army of the Tennessee, succeeding Major-General Ulysses Simpson Grant.

March 7 1864: Right Wing XVI Corps (Tennessee) was established in the Army of the Tennessee.

March 26 1864: Major-General James Birdseye McPherson assumed command of the Army of Tennessee, succeeding Major-General William Tecumseh Sherman.

July 22 1864: Major-General John Alexander Logan assumed temporary command of the Army of the Tennessee, succeeding Major-General James Birdseye McPherson.

July 27 1864: Major-General Oliver Otis Howard assumed command of the Army of the Tennessee, succeeding Major-General John Alexander Logan.

November 7 1864: XVI Corps (Tennessee) was discontinued. Right Wing XVI Corps (Tennessee) was discontinued, and renamed Detachment Army of the Tennessee (XVI Corps). Left Wing XVI Corps (Tennessee) was discontinued. Detachment Army of the Tennessee (XVI Corps) established in the Army of the Tennessee.

November 24 1864: The Army of the Tennessee transferred from the Department of the Tennessee to the Military Division of the Mississippi. XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Detachment Army of the Tennessee (XVI Corps) transferred from the Army of the Tennessee to the Military Division of the Mississippi.

XV Corps Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863-November 24 1864, transferred to Military Division of the Mississippi)

William Tecumseh Sherman (October 16 1863-October 29 1863), Francis Preston Blair (October 29 1863-December 11 1863), John Alexander Logan (December 11 1863-July 22 1864), Morgan Lewis Smith (temporary July 22 1864-July 27 1864), John Alexander Logan (July 27 1864-September 2 1864), Peter Joseph Osterhaus (September 23 1864-November 24 1864)

October 16 1863: XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Major-General William Tecumseh Sherman retained command of XV Corps (Tennessee).

October 29 1863: Major-General Francis Preston Blair assumed command of XV Corps (Tennessee), succeeding Major-General William Tecumseh Sherman.

December 11 1863: Major-General John Alexander Logan assumed command of XV Corps (Tennessee), succeeding Major-General Francis Preston Blair.

July 22 1864: Brigadier-General Morgan Lewis Smith assumed temporary command of XV Corps (Tennessee), Major-General Union John Alexander Logan.

July 27 1864: Major-General John Alexander Logan assumed command of XV Corps (Tennessee), succeeding Brigadier-General Morgan Lewis Smith.

September 23 1864: Major-General Peter Joseph Osterhaus assumed command of XV Corps (Tennessee), succeeding Major-General John Alexander Logan.

November 24 1864: XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

XVI Corps Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863-November 7 1864, discontinued, to Detachment Army of the Tennessee (XVI Corps))

Napoleon Jackson Tecumseh Dana (October 16 1863-April 16 1864), vacant (April 17 1864-October 14 1864), Napoleon Jackson Tecumseh Dana (October 15 1864-November 7 1864)

October 16 1863: XVI Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Brigadier-General Napoleon Jackson Tecumseh Dana retained command of XVI Corps (Tennessee).

March 7 1864: Right Wing XVI Corps (Tennessee) was established in the Army of the Tennessee.

April 17 1864: Command of XVI Corps (Tennessee) became vacant. Left Wing XVI Corps (Tennessee) and Right Wing XVI Corps (Tennessee) continued to operate autonomously.

October 15 1864: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of XVI Corps (Tennessee), following a vacancy.

November 7 1864: XVI Corps (Tennessee) was discontinued. Right Wing XVI Corps (Tennessee) was discontinued, and renamed Detachment Army of the Tennessee (XVI Corps). Left Wing XVI Corps (Tennessee) was discontinued.

Left Wing XVI Corps Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863-November 7 1864, discontinued)

Grenville Mellen Dodge (October 16 1863-August 19 1864), Thomas Edward Greenfield Ransom (August 19 1864-October 15 1864), Grenville Mellen Dodge (October 15 1864-November 7 1864)

October 16 1863: Left Wing XVI Corps transferred with XVI Corps (Tennessee) to the Military Division of the Mississippi. Brigadier-General Grenville Mellen Dodge retained command of Left Wing XVI Corps.

August 19 1864: Brigadier-General Thomas Edward Greenfield Ransom assumed command of Left Wing XVI Corps (Tennessee), succeeding Major-General Grenville Mellen Dodge. (Tennessee).

October 15 1864: Brigadier-General Grenville Mellen Dodge assumed command of Left Wing XVI Corps Tennessee, succeeding Brigadier-General Thomas Edward Greenfield Ransom.

November 7 1864: Left Wing XVI Corps (Tennessee) was discontinued.

Right Wing XVI Corps Tennessee

(Established, March 7 1864-November 7 1864, discontinued, to Detachment Army of the Tennessee (XVI Corps))

Andrew Jackson Smith (March 7 1864-November 7 1864)

March 7 1864: Right Wing XVI Corps (Tennessee) was established in the Army of the Tennessee. Brigadier-General Andrew Jackson Smith assumed command of Right Wing XVI Corps (Tennessee).

November 7 1864: Right Wing XVI Corps (Tennessee) was discontinued, and renamed Detachment Army of the Tennessee (XVI Corps).

XVII Corps Tennessee

(Transferred to Military Division of the Mississippi, October 16 1863-November 24 1864, transferred to Military Division of the Mississippi)

James Birdseye McPherson (October 16 1863-April 23 1864), Francis Preston Blair (temporary April 23 1864-May 3 1864, May 4 1864-September 22 1864), Thomas Edward Greenfield Ransom (September 22 1864-October 10 1864), Mortimer Dormer Leggett (temporary October 10 1864-October 24 1864), Joseph Anthony Mower (October 24 1864-October 31 1864), Francis Preston Blair (October 31 1864-November 24 1864)

October 16 1863: XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Major-General James Birdseye McPherson retained command of XVII Corps (Tennessee).

April 23 1864: Major-General Francis Preston Blair assumed temporary command of XVII Corps, succeeding Major-General James Birdseye McPherson.

May 4 1864: Major-General Francis Preston Blair assumed full command of XVII Corps (Tennessee).

September 22 1864: Brigadier-General Thomas Edward Greenfield Ransom assumed command of XVII Corps (Tennessee), succeeding Major-General Francis Preston Blair.

October 10 1864: Brigadier-General Mortimer Dormer Leggett assumed temporary command of XVII Corps (Tennessee), succeeding Brigadier-General Thomas Edward Greenfield Ransom.

October 24 1864: Major-General Joseph Anthony Mower assumed command of XVII Corps (Tennessee), succeeding Brigadier-General Mortimer Dormer Leggett.

October 31 1864: Major-General Francis Preston Blair assumed command of XVII Corps (Tennessee), succeeding Major-General Joseph Anthony Mower.

November 24 1864: XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

Detachment Army of the Tennessee (XVI Corps)

(Established, from XVI Corps Tennessee, November 7 1864-November 24 1864, transferred to Military Division of the Mississippi)

Andrew Jackson Smith (November 7 1864-November 24 1864)

November 7 1864: Right Wing XVI Corps (Tennessee) was discontinued, and renamed Detachment Army of the Tennessee (XVI Corps). Detachment Army of the Tennessee (XVI Corps) established in the Army of the Tennessee. Major-General Andrew Jackson Smith assumed command of Detachment Army of the Tennessee (XVI Corps).

November 24 1864: Detachment Army of the Tennessee (XVI Corps) transferred from the Army of the Tennessee to the Military Division of the Mississippi.

Cavalry Corps Mississippi

(Established, from Cavalry Corps Cumberland, October 29 1864-April 17 1865, discontinued)

James Harrison Wilson (October 29 1864-April 17 1865)

October 29 1864: Cavalry Corps (Military Division of the Mississippi) was established in the Military Division of the Mississippi. Brigadier-General James Harrison Wilson assumed command of Cavalry Corps (Military Division of the Mississippi).

April 17 1865: Cavalry Corps (Military Division of the Mississippi) was discontinued.

Army of Georgia

(Established, November 7 1864-June 17 1865, discontinued)

Henry Warner Slocum (November 7 1864-June 17 1865)

November 7 1864: The “Army of Georgia” was established unofficially in the Military Division of the Mississippi, comprising XIV Corps (Cumberland) and XX Corps (Cumberland). Major-General Henry Warner Slocum assumed command of the “Army of Georgia.” XX Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”. XIV Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”.

March 28 1865: The Army of Georgia was confirmed, comprising XIV Corps (Georgia) and XX Corps (Georgia). Major-General Henry Warner Slocum retained command of the Army of Georgia. XIV Corps (Cumberland) was assigned officially to the Army of Georgia. XX Corps (Cumberland) was assigned officially to the Army of Georgia.

June 1 1865: XX Corps (Georgia) was discontinued.

June 17 1865: The Army of Georgia was discontinued. XIV Corps (Georgia) transferred from the Army of Georgia to the Military Division of the Mississippi.

XIV Corps Georgia

(Transferred from Army of the Cumberland, November 7 1864-June 17 1865, transferred to Military Division of the Mississippi)

Jefferson Columbus Davis (November 7 1864-June 17 1865)

November 7 1864: XIV Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”. Brigadier-General Jefferson Columbus Davis retained command of XIV Corps (“Georgia”).

March 28 1865: XIV Corps (Cumberland) was assigned officially to the Army of Georgia. Brigadier-General Jefferson Columbus Davis retained command of XIV Corps (Georgia).

June 17 1865: XIV Corps (Georgia) transferred from the Army of Georgia to the Military Division of the Mississippi.

XX Corps Georgia

(Transferred from Army of the Cumberland, November 7 1864–June 1 1865)

Henry Warner Slocum (November 7 1864-November 11 1864), Alpheus Starkey Williams (November 11 1864-April 1 1865), Joseph Anthony Mower (April 1 1865-June 1 1865)

November 7 1864: XX Corps (Cumberland) transferred from the Army of the Cumberland to the “Army of Georgia”. Major-General Henry Warner Slocum retained command of XX Corps (“Georgia”).

November 11 1864: Brigadier-General Alpheus Starkey Williams assumed command of XX Corps (Georgia), succeeding Major-General Henry Warner Slocum.

March 28 1865: XX Corps (Georgia) was assigned officially to the Army of Georgia. Brigadier-General Alpheus Starkey Williams retained command of XX Corps (Georgia).

April 1 1865: Major-General Joseph Anthony Mower assumed command of XX Corps (Georgia), succeeding Brigadier-General Alpheus Starkey Williams.

June 1 1865: XX Corps (Georgia) was discontinued.

Army of the Tennessee

(Transferred from Department of the Tennessee, November 24 1864-June 27 1865, transferred to Military Division of the Mississippi)

Oliver Otis Howard (November 24 1864-May 19 1865), John Alexander Logan (May 19 1865-June 27 1865)

November 24 1864: The Army of the Tennessee transferred from the Department of the Tennessee to the Military Division of the Mississippi. XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Detachment Army of the Tennessee (XVI Corps) transferred to the Military Division of the Mississippi. Major-General Oliver Otis Howard retained command of the Army of the Tennessee.

February 18 1865: Detachment Army of the Tennessee (XVI Corps) was discontinued, and its forces incorporated into XVI Corps (Gulf).

May 19 1865: Major-General John Alexander Logan assumed command of the Army of the Tennessee, succeeding Major-General Oliver Otis Howard.

June 27 1865: The Army of the Tennessee remained in the Military Division of the Mississippi. XVII Corps (Tennessee) transferred with the Army of the Tennessee in the Military Division of the Mississippi. XV Corps (Tennessee) transferred with the Army of the Tennessee in the Military Division of the Mississippi.

XV Corps Tennessee

(Transferred to Military Division of the Mississippi, November 24 1864-June 27 1865, transferred to Military Division of the Mississippi)

Peter Joseph Osterhaus (November 24 1864-January 8 1865), John Alexander Logan (January 8 1865-May 23 1865), William Babcock Hazen (May 23 1865-June 27 1865)

November 24 1864: XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Major-General Peter Joseph Osterhaus retained command of XV Corps Tennessee.

January 8 1865: Major-General John Alexander Logan assumed command of XV Corps (Tennessee), succeeding Major-General Peter Joseph Osterhaus.

May 23 1865: Major-General William Babcock Hazen assumed command of XV Corps (Tennessee), succeeding Major-General John Alexander Logan.

June 27 1865: XV Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

Detachment Army of the Tennessee (XVI Corps)

(Transferred to Military Division of the Mississippi, November 24 1864-February 18 1865, discontinued, to XVI Corps (Gulf))

Andrew Jackson Smith (November 24 1864-February 18 1865)

November 24 1864: Detachment Army of the Tennessee (XVI Corps) transferred to the Military Division of the Mississippi. Major-General Andrew Jackson Smith retained command of Detachment Army of the Tennessee (XVI Corps).

February 18 1865: Detachment Army of the Tennessee (XVI Corps) was discontinued, renamed XVI Corps (Gulf) and transferred to the Army of the Gulf.

XVII Corps Tennessee

(Transferred to Military Division of the Mississippi, November 24 1864-June 27 1865, transferred to Military Division of the Mississippi)

Francis Preston Blair (November 24 1864-May 8 1865), Mortimer Dormer Leggett (temporary May 8 1865-May 9 1865), Francis Preston Blair (May 9 1865-June 24 1865), Mortimer Dormer Leggett (temporary June 24 1865-June 27 1865)

November 24 1864: XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi. Major-General Francis Preston Blair retained command of XVII Corps (Tennessee).

May 8 1865: Brigadier-General Mortimer Dormer Leggett assumed temporary command of XVII Corps (Tennessee), succeeding Major-General Francis Preston Blair.

May 9 1865: Major General Francis Preston Blair assumed command of XVII Corps (Tennessee), succeeding Brigadier-General Mortimer Dormer Leggett.

June 24 1865: Brigadier-General Mortimer Dormer Leggett assumed temporary command of XVII Corps (Tennessee), succeeding Major-General Francis Preston Blair.

June 27 1865: XVII Corps (Tennessee) transferred with the Army of the Tennessee to the Military Division of the Mississippi.

Army of the Ohio

(Transferred from Department of the Ohio, January 15 1865-February 2 1865, discontinued, to Department of North Carolina)

John McAllister Schofield (January 15 1865-February 2 1865)

January 15 1865: The Army of the Ohio transferred from the Department of the Ohio to the Military Division of the Mississippi. Major-General John McAllister Schofield retained command of the Army of the Ohio.

February 2 1865: The Army of the Ohio was discontinued, and its field forces transferred as the XVIII Corps (Ohio) to the Department of North Carolina. XXIII Corps (Ohio) transferred to the Department of North Carolina and continued to be described unofficially as the “Army of the Ohio”.

XXIII Corps Ohio

(Transferred to Military Division of the Mississippi, January 15 1865-February 2 1865, transferred to Department of North Carolina)

John McAllister Schofield (January 15 1865-February 2 1865)

January 15 1865: XXIII Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi. Major-General John McAllister Schofield retained command of XXIII Corps (Ohio).

February 2 1865: XVIII Corps (Ohio) transferred to the Department of North Carolina, retaining the unofficial name of the “Army of the Ohio”.

Department of North Carolina

(Established, from Department of Virginia and North Carolina, January 31 1865-June 27 1865, transferred to Military Division of the Atlantic)

John Gray Foster (interim January 31 1865-9 February 1865), John McAllister Schofield (9 February 1865-March 31 1865), Jacob Dolson Cox (March 31 1865-June 17 1865), Thomas Howard Ruger (temporary June 17 1865-June 27 1865)

January 31 1865: The Department of North Carolina was established in the Military Division of the Mississippi. Major-General John McAllister Schofield was appointed to command the Department of North Carolina, arriving on 9th February 1865. Major-General John Gray Foster assumed interim command of the Department of North Carolina. The District of North Carolina was established in the Department of North Carolina. The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia to the District of North Carolina. Terry’s Provisional Corps transferred from the Department of Virginia to the Department of North Carolina.

February 2 1865: XXIII Corps (Ohio) transferred to the Department of North Carolina, referred to unofficially as the “Army of the Ohio”.

February 9 1865: Major-General John McAllister Schofield arrived to command the Department of North Carolina, succeeding Major-General John Gray Foster.

February 25 1865: The Sub-District of Beaufort (North Carolina) was discontinued, and renamed as the District of Beaufort. The District of Beaufort was established in the Department of North Carolina.

March 1 1865: The District of North Carolina was discontinued. The District of Wilmington was established in the Department of North Carolina.

March 23 1865: X Corps (North Carolina) was established in the Department of North Carolina, comprising forces previously in Terry’s Provisional Corps (Virginia).

March 31 1865: Major-General Jacob Dolson Cox assumed command of the Department of North Carolina, succeeding Major-General John McAllister Schofield.

April 19 1865: The parts of North Carolina not occupied by the armies of the Military Division of the Mississippi were transferred from the Department of North Carolina to the Military Division of the James.

June 17 1865: Brigadier-General Thomas Howard Ruger assumed temporary command of the Department of North Carolina, succeeding Major-General Jacob Dolson Cox.

June 27 1865: The Department of North Carolina transferred from the Military Division of the Mississippi to the Military Division of the Atlantic. The District of Wilmington transferred with the Department of North Carolina to the Military Division of the Atlantic. X Corps (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic. The District of Beaufort (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic.

District of North Carolina

(Established, January 31 1865-March 1 1865, discontinued)

Innis Newton Palmer (January 31 1865-March 1 1865)

January 31 1865: The District of North Carolina was established in the Department of North Carolina. It comprised the territories of New Bern, Roanoke Island, Beaufort and Roanoke. Brigadier-General Innis Newton Palmer assumed command of the District of North Carolina.

March 1 1865: The District of North Carolina was discontinued.

Sub-District of Beaufort North Carolina

(Transferred from Department of Virginia and North Carolina, January 31 1865-February 25 1865, discontinued, to District of Beaufort North Carolina)

James Stewart (January 31 1865-February 25 1865)

January 31 1865: The Sub-District of Beaufort (North Carolina) transferred from the Department of Virginia to the District of North Carolina. Colonel James Stewart retained command of the Sub-District of Beaufort (North Carolina).

February 25 1865: The Sub-District of Beaufort (North Carolina) was discontinued, and renamed as the District of Beaufort.

District of Beaufort North Carolina

(Established, from Sub-District of Beaufort North Carolina, February 25 1865-June 27 1865, transferred to Military Division of the Atlantic)

Jacob Dolson Cox (February 25 1865-March 18 1865), Innis Newton Palmer (March 18 1865-June 1 1865), Charles Jackson Paine (June 1 1865-June 27 1865)

February 25 1865: The District of Beaufort was established in the Department of North Carolina, comprising the former Sub-District of Beaufort (North Carolina). It included all posts north of Port Macon, North Carolina. Major-General Jacob Dolson Cox assumed command of the District of Beaufort (North Carolina).

March 18 1865: Brigadier-General Innis Newton Palmer assumed command of the District of Beaufort (North Carolina), succeeding Major-General Jacob Dolson Cox.

June 1 1865: Brigadier-General Charles Jackson Paine assumed command of the District of Beaufort (North Carolina), succeeding Brigadier-General Innis Newton Palmer.

June 27 1865: The District of Beaufort (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic.

District of Wilmington

(Established, March 1 1865-June 27 1865, transferred to Military Division of the Atlantic)

Joseph Roswell Hawley (March 1 1865-June 23 1865), John Worthington Ames (June 23 1865-June 27 1865)

March 1 1865: The District of Wilmington was established in the Department of North Carolina. It comprised Wilmington, North Carolina, and the territory around, including the locations occupied by XVIII Corps (North Carolina) (“Army of the Ohio”). Brigadier-General Joseph Roswell Hawley assumed command of the District of Wilmington.

June 23 1865: Colonel John Worthington Ames assumed command of the District of Wilmington, succeeding Brigadier-General Joseph Roswell Hawley.

June 27 1865: The District of Wilmington transferred with the Department of North Carolina to the Military Division of the Atlantic.

Terry’s Provisional Corps North Carolina

(Transferred from Department of Virginia and North Carolina, January 31 1865-March 23 1865, to X Corps (North Carolina))

Alfred Howe Terry (January 31 1865-March 23 1865)

January 31 1865: Terry’s Provisional Corps (Virginia) transferred from the Department of Virginia to the Department of North Carolina. Major-General Alfred Howe Terry retained command of Terry’s Provisional Corps (North Carolina).

March 23 1865: Terry’s Provisional Corps (North Carolina) was discontinued, and its forces transferred to X Corps (North Carolina).

XXIII Corps North Carolina

(Transferred from Army of the Ohio, February 2 1865-June 27 1865, transferred to Military Division of the Atlantic)

John McAllister Schofield (February 2 1865-March 31 1865), Jacob Dolson Cox (March 31 1865-June 27 1865)

February 2 1865: XXIII Corps transferred with the Army of the Ohio to the Department of North Carolina and continued to be referred to unofficially as the “Army of the Ohio”. Major-General John McAllister Schofield retained command of XXIII Corps (North Carolina) in the Department of North Carolina.

March 31 1865: Major-General Jacob Dolson Cox assumed command of XXIII Corps (North Carolina), succeeding Major-General John McAllister Schofield.

June 27 1865: XXIII Corps (North Carolina) transferred to the Military Division of the Atlantic

X Corps North Carolina

(Established, from Terry’s Provisional Corps (North Carolina), March 23 1865-June 27 1865, transferred to Military Division of the Atlantic)

Alfred Howe Terry (March 23 1865-May 13 1865), Adelbert Ames (May 13 1865-June 27 1865)

March 23 1865: X Corps was established in the Department of North Carolina, comprising forces previously in Terry’s Provisional Corps (North Carolina). Major-General Alfred Howe Terry retained command of X Corps (North Carolina).

May 13 1865: Brigadier-General Adelbert Ames assumed command of X Corps (North Carolina), succeeding Major-General Alfred Howe Terry.

June 27 1865: X Corps (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic.

Department of Kentucky

(Established, from District of Kentucky, February 10 1865-June 27 1865, transferred to Military Division of the Tennessee)

John McAuley Palmer (February 10 1865-May 1 1865), Edward Henry Hobson (May 1 1865-June 27 1865)

February 10 1865: The Department of Kentucky was established in the Military Division of the Mississippi. It comprised the state of Kentucky transferred from Department of Cumberland and the Northern Department. The District of Kentucky was discontinued, and its territory incorporated into the Department of Kentucky. The territory around Covington transferred from the Northern Department to the Department of Kentucky. The District of Western Kentucky was established in the Department of Kentucky. Major-General John McAuley Palmer was appointed to command the Department of Kentucky, arriving on 18th February 1865.

February 18 1865: Major-General John McAuley Palmer arrived to take command of the Department of Kentucky.

May 1 1865: Brigadier-General Edward Henry Hobson assumed temporary command of the Department of Kentucky, succeeding Major-General John McAuley Palmer.

May 21 1865: The District of Western Kentucky was discontinued.

June 27 1865: The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee.

District of Western Kentucky

(Established, February 10 1865-May 21 1865, discontinued)

Solomon Meredith (February 10 1865-May 21 1865)

February 10 1865: The District of Western Kentucky was established in the Department of Kentucky. Brigadier-General Solomon Meredith assumed command of the District of Western Kentucky.

May 21 1865: The District of Western Kentucky was discontinued.

XIV Corps Mississippi

(Transferred from Army of Georgia, June 17 1865-June 27 1865, transferred to Military Division of the Mississippi)

Jefferson Columbus Davis (June 17 1865-June 27 1865)

June 17 1865: XIV Corps (Georgia) transferred from the discontinued Army of Georgia to the Military Division of the Mississippi. Brigadier-General Jefferson Columbus Davis retained command of XIV Corps (Mississippi).

June 27 1865: XIV Corps (Mississippi) remained in the Military Division of the Mississippi.

Northern Department (Department of the North)

(Established, January 12 1864-June 27 1865, discontinued, to Department of the Ohio)

Samuel Peter Heintzelman (January 12 1864-September 28 1864 interim October 1 1864), Joseph Hooker (September 28 1864-June 27 1865)

January 12 1864: The Northern Department (or Department of the North) was established, comprising the states of Michigan, Ohio, Indiana and Illinois, with headquarters at Columbus, Ohio. Alton, Illinois. The counties of Hancock, Brooke and Ohio in West Virginia were transferred from the Department of West Virginia to the Northern Department. Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department. The states of Ohio, Michigan, Indiana and Illinois were transferred from the Department of the Ohio to the Northern Department. The District of Indiana was established in the Northern Department. Major-General Samuel Peter Heintzelman was appointed to command the Northern Department, arriving on 20th January 1864.

January 20 1864: Major-General Samuel Peter Heintzelman arrived to command the Northern Department.

January 25 1864: Cairo, Illinois, transferred from the Northern Department to the District of Cairo in the Department of the Tennessee.

February 8 1864: Jeffersonville, Indiana, transferred from the Northern Department to the Department of the Ohio.

February 15 1864: Alton, Illinois, transferred back from the Northern Department to the Department of the Missouri.

June 25 1864: Covington, Kentucky, and the territory surrounding within ten miles transferred from the Department of the Ohio to the Northern Department.

August 13 1864: The District of Illinois was established in the Northern Department, comprising the state of Illinois.

September 28 1864: Major-General Joseph Hooker was appointed to command the Northern Department, arriving on 1st October 1864, to succeed Major-General Samuel Peter Heintzelman.

October 1 1864: Major-General Joseph Hooker arrived to command the Northern Department, succeeding Major-General Samuel Peter Heintzelman.

October 1 1864: The District of Michigan was established in the Northern Department.

November 24 1864: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.

February 10 1865: The territory around Covington transferred from the Northern Department to the Department of Kentucky. The territory around Jeffersonville, Indiana, transferred from the Department of the Cumberland to the Northern Department.

June 27 1865: The Northern Department was discontinued, and its territory incorporated into the Department of the Ohio. The District of Illinois was discontinued. The District of Indiana was discontinued. The District of Michigan was discontinued.

District of Indiana

(Established, January 12 1864-June 27 1865, discontinued)

John Smith Simonson (January 12 1864-May 23 1864), Henry Beebe Carrington (May 23 1864-August 25 1864), Alvin Peterson Hovey (August 25 1864-June 27 1865)

January 12 1864 The District of Indiana was established in the Northern Department. It comprised the state of Indiana. Colonel John Smith Simonson assumed command of the District of Indiana.

May 23 1864: Brigadier-General Henry Beebe Carrington assumed command of the District of Indiana, succeeding Colonel John Smith Simonson.

August 25 1864: Brigadier-General Alvin Peterson Hovey assumed command of the District of Indiana, succeeding Brigadier-General Henry Beebe Carrington.

June 27 1865: The District of Indiana was discontinued.

District of Illinois

(Established, August 13 1864-June 27 1865, discontinued)

Halbert Eleazer Paine (August 13 1864-September 10 1864), John Cook (September 10 1864-June 27 1865)

August 13 1864: The District of Illinois was established in the Northern Department, comprising the state of Illinois. Brigadier-General Halbert Eleazer Paine assumed command of the District of Illinois.

September 10 1864: Brigadier-General John Cook assumed command of the District of Illinois, succeeding Brigadier-General Halbert Eleazer Paine.

June 27 1865: The District of Illinois was discontinued.

District of Michigan

(Established, October 1 1864-June 27 1865, discontinued)

Bennett Hoskin Hill (October 1 1864-June 27 1865)

October 1 1864: The District of Michigan was established in the Northern Department. It comprised the state of Michigan. Lieutenant-Colonel Bennett Hoskin Hill assumed command of the District of Michigan.

June 27 1865: The District of Michigan was discontinued.

Part 4: Post War organisation, June 1865-December 1865

Military Division of the Pacific

(Established, June 27 1865-December 31 1865)

Henry Wager Halleck (June 27 1865-December 31 1865)

June 27 1865: The Military Division of the Pacific was established. It included the Department of California and the Department of the Columbia. Major-General Henry Wager Halleck was appointed to command the Military Division of the Pacific, arriving on 30th August 1865. The Department of California was established in the Military Division of the Pacific. The District of Arizona transferred from the Department of the Pacific to the Department of California. The Department of the Columbia was established in the Military Division of the Pacific.

August 30 1865: Major-General Henry Wager Halleck arrived to command the Military Division of the Pacific.

Department of California

(Established, from Department of the Pacific, June 27 1865-December 31 1865)

Irvin McDowell (June 27 1865-December 31 1865)

June 27 1865: The Department of California was established in the Military Division of the Pacific. It included California, Nevada, the Arizona Territory, and the New Mexico Territory transferred from the Department of the Pacific and the Department of the Missouri. The District of Arizona transferred from the Department of the Pacific to the Department of California. Major-General Irvin McDowell was appointed to command the Department of California, arriving on July 1st 1865.

July 1 1865: Major-General Irvin McDowell arrived to command the Department of California.

July 21 1865: The District of Arizona was discontinued.

District of Arizona

(Transferred from Department of the Pacific, June 27 1865-July 21 1865, discontinued)

John Sanford Mason (June 27 1865-July 21 1865)

June 27 1865: The District of Arizona transferred from the Department of the Pacific to the Department of California. Brigadier-General John Sanford Mason retained command of the District of Arizona.

July 21 1865: The District of Arizona was discontinued.

Department of the Columbia

(Established, from Department of the Pacific, June 27 1865-December 31 1865)

(George Wright), George Byron Currey (temporary June 27 1865-November 13 1865), Charles Swain Lovell (temporary November 13 1865-November 20 1865), John Miller Drake (interim November 20 1865-December 1 1865), Charles Swain Lovell (November 13 1865-December 31 1865)

June 27 1865: The Department of the Columbia was established in the Military Division of the Pacific. It included Oregon, Washington Territory and Idaho Territory transferred from the Department of the Pacific. Brigadier-General George Wright was appointed to command the Department of the Columbia. Colonel George Byron Currey assumed temporary command of the Department of the Columbia, arriving on 8th August 1865.

July 30 1865: Brigadier-General George Wright died prior to taking command of the Department of the Columbia. Colonel George Byron Currey retained temporary command of the Department of the Columbia, arriving on August 18 1865.

August 18 1865: Colonel George Byron Currey arrived to temporary command of the Department of the Columbia.

November 13 1865: Colonel Charles Swain Lovell was appointed to temporary command of the Department of the Columbia, arriving on 1st December 1865, to succeed Colonel George Byron Currey.

November 20 1865: Lieutenant-Colonel John Miller Drake assumed temporary command of the Department of the Columbia, succeeding Colonel George Byron Curry.

December 1 1865: Colonel Charles Swain Lovell arrived to command the Department of the Columbia, succeeding Lieutenant Colonel John Miller Drake.

Military Division of the Atlantic

(Established, from Department of the James, June 27 1865-December 31 1865)

George Gordon Meade (June 27 1865-December 31 1865)

June 27 1865: The Military Division of the Atlantic was established. It included the Department of the East, the Department of Virginia, the Department of North Carolina, the Department of South Carolina, and the Middle Department. Major-General George Gordon Meade was appointed to command the Military Division of the Atlantic, arriving on 1st July 1865. The Army of the Potomac transferred from the Department of the Potomac to the Military Division of the Atlantic. The Department of the East transferred to the Military Division of the Atlantic. The Middle Department transferred to the Military Division of the Atlantic. The Department of North Carolina transferred from the Military Division of the Mississippi to the Military Division of the Atlantic. The Department of South Carolina was established in the Military Division of the Atlantic. The Department of Virginia transferred from the Military Division of the James to the Military Division of the Atlantic. The Department of Washington transferred from the Middle Military Division to the Military Division of the Atlantic. The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic.

June 28 1865: The Army of the Potomac was discontinued. The Army of the James transferred from the Department of Virginia to the Military Division of the Atlantic.

July 1 1865: Major-General George Gordon Meade arrived to command the Military Division of the Atlantic.

August 1 1865: The Army of the James was discontinued. VIII Corps (Middle) was discontinued. X Corps (North Carolina) was discontinued. XXIII Corps (North Carolina) was discontinued. XXIV Corps (James) was discontinued.

Department of the East

(Transferred to Military Division of the Atlantic, June 27 1865-December 31 1865)

John Adams Dix (June 27 1865-July 15 1865), Joseph Hooker (July 15 1865-December 31 1865)

June 27 1865: The Department of the East transferred to the Military Division of the Atlantic. Major-General John Adams Dix retained command of the Department of the East.

July 15 1865: Major-General Joseph Hooker assumed command of the Department of the East, succeeding Major-General John Adams Dix.

September 14 1865: The District of Western New York was established in the Department of the East. It comprised Elmira, Rochester, Fort Ontario, Fort Niagara and Fort Porter counties in New York.

District of Western New York

(Established, September 14 1865-December 31 1865)

Alexander Samuel Diven (September 14 1865-December 31 1865)

September 14 1865: The District of Western New York was established in the Department of the East. It comprised Elmira, Rochester, Fort Ontario, Fort Niagara and Fort Porter counties in New York. Colonel Alexander Samuel Diven assumed command of the District of Western New York.

Department of Virginia

(Transferred from Military Division of the James, June 27 1865-December 31 1865)

Alfred Howe Terry (June 27 1865-December 31 1865)

June 27 1865: The Department of Virginia transferred from the Military Division of the James to the Military Division of the Atlantic. It was reorganised to comprise Virginia except for Alexandria, Fairfax and Loudoun counties and the Shenandoah Valley south of and including Rockingham County, transferred from the Department of the Potomac. Major-General Alfred Howe Terry retained command of the Department of Virginia. The District of Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. The Army of the James transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. The District of Fort Monroe transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic. The Sub-District of Blackwater transferred with the District of the Nottoway to the Military Division of the Atlantic. The Sub-District of Roanoke transferred with the District of the Nottoway to the Military Division of the Atlantic. The Sub-District of the Rappahannock transferred with the Department of Virginia to the Military Division of the Atlantic. The Sub-District of the South Anna transferred with the Department of Virginia to the Military Division of the Atlantic.

July 10 1865: The District of Northeastern Virginia was established in the Department of Virginia.

July 13 1865: The District of Lynchburg was discontinued. Manchester County, Virginia, was added to the District of Henrico. The District of Southwestern Virginia was established in the Department of Virginia.

July 16 1865: The Sub-District of Roanoke was discontinued. The Sub-District of the Rappahannock was discontinued, and its territory incorporated into the District of Northeastern Virginia.

August 1 1865: The District of the Nottoway was discontinued. The Sub-District of Blackwater transferred from the District of the Nottoway to the Department of Virginia. The Sub-District of the Appomattox transferred from the District of the Nottoway to the Department of Virginia. The Army of the James was discontinued.

August 11 1865: The Sub-District of the Appomattox was discontinued.

August 24 1865: The District of Eastern Virginia was discontinued.

August 29 1865: The Sub-District of the Peninsula was discontinued.

September 19 1865: The Sub-District of Blackwater was discontinued.

District of Virginia

(Transferred from Military Division of the James, June 27 1865-December 31 1865)

Edward Otho Cresap Ord (June 27 1865-December 31 1865)

June 27 1865: The District of Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. Major-General Edward Otho Cresap Ord retained command of the District of Virginia.

District of Henrico

(Transferred from Military Division of the James, June 27 1865-December 31 1865)

John Wesley Turner (June 27 1865-December 31 1865)

June 27 1865: The District of Henrico transferred with the Department of Virginia to the Military Division of the Atlantic. Brigadier-General John Wesley Turner retained command of the District of Henrico.

July 13 1865: Manchester County, Virginia, was added to the District of Henrico.

District of Eastern Virginia

(Transferred from Military Division of the James, June 27 1865-August 24 1865, discontinued)

George Henry Gordon (June 27 1865-August 24 1865)

June 27 1865: The District of Eastern Virginia transferred with the Department of Virginia to the Military Division of the Atlantic. Brigadier-General George Henry Gordon retained command of District of Eastern Virginia.

August 24 1865: The District of Eastern Virginia was discontinued.

District of Fort Monroe

(Transferred from Military Division of the James, June 27 1865-December 31 1865)

Nelson Appleton Miles (June 27 1865-December 31 1865)

June 27 1865: The District of Fort Monroe transferred with the Department of Virginia to the Military Division of the Atlantic. Brigadier-General Nelson Appleton Miles retained command of the District of Fort Monroe. The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic.

August 29 1865: The Sub-District of the Peninsula was discontinued.

Sub-District of the Peninsula

(Transferred from Military Division of the James, June 27 1865-August 29 1865, discontinued)

Benjamin Chambers Ludlow (June 27 1865-August 29 1865)

June 27 1865: The Sub-District of the Peninsula transferred with the District of Fort Monroe to the Military Division of the Atlantic. Colonel Benjamin Chambers Ludlow retained command of the Sub-District of the Peninsula.

August 29 1865: The Sub-District of the Peninsula was discontinued.

District of Lynchburg

(From Military Division of the James, June 27 1865-July 13 1865, discontinued, to District of Southwestern Virginia)

John Irvin Gregg (June 27 1865-July 13 1865)

June 27 1865: The District of Lynchburg transferred with the Department of Virginia to the Military Division of the Atlantic. Colonel John Irvin Gregg retained command of the District of Lynchburg.

July 13 1865: The District of Lynchburg was discontinued.

District of the Nottoway

(Transferred from Military Division of the James, June 27 1865-August 1 1865, discontinued)

George Lucas Hartsuff (June 27 1865-August 1 1865)

June 27 1865: The District of the Nottoway transferred with the Department of Virginia to the Military Division of the Atlantic. Major-General George Lucas Hartsuff retained command of the District of the Nottoway. The Sub-District of Blackwater transferred with the District of the Nottoway to the Military Division of the Atlantic. The Sub-District of Roanoke transferred with the District of the Nottoway to the Military Division of the Atlantic.

August 1 1865: The District of the Nottoway was discontinued. The Sub-District of Blackwater transferred from the District of the Nottoway to the Department of Virginia. The Sub-District of the Appomattox transferred from the District of the Nottoway to the Department of Virginia.

Sub-District of Blackwater

(Transferred from Military Division of the James, June 27 1865-August 1 1865, transferred to Department of Virginia)

Gilbert Hunt McKibbin (June 27 1865-August 1 1865)

June 27 1865: The Sub-District of Blackwater transferred with the District of the Nottoway to the Military Division of the Atlantic. Captain Gilbert Hunt McKibbin assumed command of the Sub-District of Blackwater.

August 1 1865: The Sub-District of Blackwater transferred from the District of the Nottoway to the Department of Virginia.

Sub-District of Roanoke

(Transferred from Military Division of the James, June 27 1865-July 16 1865, discontinued)

Edward Ferrero (June 27 1865-July 16 1865)

June 27 1865: The Sub-District of Roanoke transferred with the District of the Nottoway to the Military Division of the Atlantic. Brigadier-General Edward Ferrero retained command of the Sub-District of Roanoke.

July 16 1865: The Sub-District of Roanoke was discontinued.

Sub-District of the Appomattox

(Transferred from Military Division of the James, June 27 1865-August 1 1865, transferred to Department of Virginia)

Charles Henry Smith (June 27 1865-August 1 1865)

June 27 1865: The Sub-District of the Appomattox transferred with the District of the Nottoway to the Military Division of the Atlantic. Colonel Charles Henry Smith retained command of the Sub-District of the Appomattox.

August 1 1865: The Sub-District of the Appomattox transferred from the District of the Nottoway to the Department of Virginia.

Sub-District of the Rappahannock

(Transferred from Military Division of the James, June 27 1865-July 16 1865, discontinued)

Edwin Vose Sumner Jr (June 27 1865-July 16 1865)

June 27 1865: The Sub-District of the Rappahannock transferred with the Department of Virginia to the Military Division of the Atlantic. Colonel Edwin Vose Sumner Jr retained command of the Sub-District of the Rappahannock.

July 16 1865: The Sub-District of the Rappahannock was discontinued, and its territory incorporated into the District of Northeastern Virginia.

Sub-District of the South Anna

(Transferred from Military Division of the James, June 27 1865-December 31 1865)

Alvin Coe Voris (June 27 1865-December 31 1865)

June 27 1865: The Sub-District of the South Anna transferred with the Department of Virginia to the Military Division of the Atlantic. Colonel Alvin Coe Voris retained command of the Sub-District of the South Anna.

District of Northeastern Virginia

(Established, July 10 1865-December 31 1865)

Charles Devens (July 10 1865-December 31 1865)

July 10 1865: The District of Northeastern Virginia was established in the Department of Virginia. It comprised the counties of Loudon, Prince William, Fauquier, Stafford, Rappahannock, Culpeper, Madison, King George, Westmoreland, Northumberland, Richmond and Lancaster in Virginia. Brigadier-General Charles Devens assumed command of the District of Northeastern Virginia.

District of Southwestern Virginia

(Established, from District of Lynchburg, July 13 1865-December 31 1865)

Newton Martin Curtis (July 13 1865-December 31 1865)

July 13 1865: The District of Southwestern Virginia was established in the Department of Virginia. It comprised 31 counties in south-western Virginia around Lynchburg. Brigadier-General Newton Martin Curtis assumed command of the District of Southwestern Virginia.

Sub-District of Blackwater

(Transferred from District of the Nottoway, August 1 1865-September 19 1865, discontinued)

Gilbert Hunt McKibbin (August 1 1865-September 19 1865)

August 1 1865: The Sub-District of Blackwater transferred from the District of the Nottoway to the Department of Virginia. Captain Gilbert Hunt McKibbin retained command of the Sub-District of Blackwater.

September 19 1865: The Sub-District of Blackwater was discontinued.

Sub-District of the Appomattox

(Transferred from District of the Nottoway, August 1 1865-August 11 1865, discontinued)

Charles Henry Smith (August 1 1865-August 11 1865)

August 1 1865: The Sub-District of the Appomattox transferred from the District of the Nottoway to the Department of Virginia. Colonel Charles Henry Smith retained command of the Sub-District of the Appomattox.

August 11 1865: The Sub-District of the Appomattox was discontinued.

Department of North Carolina

(Transferred from Military Division of the Mississippi, June 27 1865-December 31 1865)

Samuel Powhatan Carter (temporary June 27 1865-June 28 1865) Thomas Howard Ruger (June 28 1865-December 31 1865)

June 27 1865: The Department of North Carolina transferred from the Military Division of the Mississippi to the Military Division of the Atlantic. Brigadier-General Samuel Powhatan Carter assumed temporary command of the Department of North Carolina, succeeding Brigadier-General Thomas Howard Ruger. The District of Wilmington transferred with the Department of North Carolina to the Military Division of the Atlantic. X Corps (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic. XXIII Corps (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic. The District of Beaufort (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic.

June 28 1865: Brigadier-General Thomas Howard Ruger assumed command of the Department of North Carolina, succeeding Brigadier-General Samuel Powhatan Carter.

July 6 1865: The District of Beaufort (North Carolina) was discontinued. The District of Greensboro was established in the Department of North Carolina. The District of New Bern was established in the Department of North Carolina. The District of Raleigh was established in the Department of North Carolina. The District of West North Carolina was established in the Department of North Carolina.

August 1 1865: X Corps (North Carolina) was discontinued. XXIII Corps (North Carolina) was discontinued.

September 20 1865: The District of Wilmington was discontinued.

October 1 1865: The District of West North Carolina was discontinued.

District of Wilmington

(Transferred from Military Division of the Mississippi, June 27 1865-September 20 1865, discontinued)

John Worthington Ames (June 27 1865-September 20 1865)

June 27 1865: The District of Wilmington transferred with the Department of North Carolina to the Military Division of the Atlantic. Colonel John Worthington retained command of the District of Wilmington.

September 20 1865: The District of Wilmington was discontinued.

District of Beaufort North Carolina

(Transferred from Military Division of the Mississippi, June 27 1865-July 6 1865, discontinued)

Charles Jackson Paine (June 27 1865-July 6 1865)

June 27 1865: The District of Beaufort (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic. Brigadier-General Charles Jackson Paine retained command of the District of Beaufort (North Carolina).

July 6 1865: The District of Beaufort (North Carolina) was discontinued.

District of New Bern

(Established, July 6 1865-December 31 1865)

Charles Jackson Paine (July 6 1865-December 31 1865)

July 6 1865: The District of New Bern was established in the Department of North Carolina. It comprised the counties of Hertford, Bertie, Martin, Pitt, Greene, Lenoir, Jones and Onslow and all counties east of them in North Carolina. Brigadier-General Charles Jackson Paine assumed command of the District of New Bern.

District of Greensboro

(Established, July 6 1865-December 31 1865)

Samuel Powhatan Carter (July 6 1865-December 31 1865)

July 6 1865: The District of Greensboro was established in the Department of North Carolina. The district extended over 22 counties in central North Carolina, around Greensboro. Brigadier-General Samuel Powhatan Carter assumed command of the District of Greensboro.

District of Raleigh

(Established, July 6 1865-December 31 1865)

Adelbert Ames (July 6 1865-December 31 1865)

July 6 1865: The District of Raleigh was established in the Department of North Carolina. It comprised the vicinity of Raleigh and Goldsboro, North Carolina. Brigadier-General Adelbert Ames assumed command of the District of Raleigh.

District of West North Carolina

(Established, July 6 1865-October 1 1865, discontinued)

Thomas Tinsley Heath (July 6 1865-October 1 1865)

July 6 1865: The District of West North Carolina was established in the Department of North Carolina. It comprised the territory around Morganton, North Carolina. Colonel Thomas Tinsley Heath assumed command of the District of West North Carolina.

October 1 19865: The District of West North Carolina was discontinued.

X Corps North Carolina

(Transferred from the Military Division of the Mississippi, June 27 1865-August 1 1865, discontinued)

Adelbert Ames (June 27 1865-August 1 1865)

June 27 1865: X Corps (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic. Brigadier-General Adelbert Ames retained command of X Corps (North Carolina).

August 1 1865: X Corps (North Carolina) was discontinued.

XXIII Corps North Carolina

(Transferred from the Military Division of the Mississippi, June 27 1865-August 1 1865, discontinued)

Jacob Dolson Cox (June 27 1865-August 1 1865)

June 27 1865: XXIII Corps (North Carolina) transferred with the Department of North Carolina to the Military Division of the Atlantic. Major-General Jacob Dolson Cox retained command of XXIII Corps (North Carolina).

August 1 1865: XXIII Corps (North Carolina) was discontinued.

Department of South Carolina

(Established, from Department of the South, June 27 1865-December 31 1865)

Quincy Adams Gillmore (June 27 1865-September 10 1865), Charles Devens (temporary September 10 1865-October 16 1865), Quincy Adams Gillmore (October 16 1865-November 9 1865 interim November 18 1865), Daniel Edgar Sickles (November 9 1865-December 31 1865)

June 27 1865: The Department of South Carolina was established in the Military Division of the Atlantic. Major-General Quincy Adams Gillmore was appointed to command the Department of South Carolina, arriving on 18th July 1865.

July 18 1865: Major-General Quincy Adams Gillmore arrived to command the Department of South Carolina.

September 10 1865: Brigadier-General Charles Devens assumed temporary command of the Department of South Carolina, succeeding Major-General Quincy Adams Gillmore.

October 16 1865: Major-General Quincy Adams Gillmore assumed command of the Department of South Carolina, succeeding Brigadier-General Charles Devens.

November 9 1865: Major-General Daniel Edgar Sickles was appointed to command the Department of South Carolina, arriving on 18th November 1865.

November 18 1865: Major-General Daniel Edgar Sickles arrived to command the Department of South Carolina, succeeding Brigadier-General Charles Devens.

Middle Department

(Transferred from Middle Military Division, June 27 1865-December 31 1865)

Lewis Wallace (interim June 27 1865-July 18 1865), Winfield Scott Hancock (June 27 1865-August 18 1865), Andrew Atkinson Humphreys (temporary August 18 1865-October 23 1865, October 23 1865-November 13 1865), Winfield Scott Hancock (November 13 1865-December 21 1865), Emory Upton (temporary December 21 1865-December 29 1865), Winfield Scott Hancock (December 29 1865-December 31 1865)

June 27 1865: The Middle Department transferred from the Middle Military Division to the Military Division of the Atlantic. Major-General Winfield Scott Hancock was appointed to command the Middle Department, arriving on 18th July 1865, to succeed Major-General Lewis Wallace. Major-General Lewis Wallace retained interim command of the Middle Department. The District of Columbia, Montgomery county, that part of Anne Arundel county south of the Annapolis & Elkridge Railroad including Annapolis and Prince George’s, Calvert, Charles and St Mary’s counties in Maryland and Alexandria and Fairfax counties in Virginia were transferred from the Department of the Potomac and the Department of Washington to the Middle Department. The Department of West Virginia was discontinued, and its territory was incorporated into the Middle Department and the Department of the Ohio. The District of Annapolis transferred with the Middle Department to the Military Division of the Atlantic. The District of Delaware and the Eastern Shore transferred with the Middle Department to the Military Division of the Atlantic. VIII Corps (Middle) transferred from the Middle Military Division to the Military Division of the Atlantic.

July 18 1865: Major-General Winfield Scott Hancock arrived to command the Middle Department, succeeding Major-General Lewis Wallace.

July 19 1865: The District of Annapolis was discontinued.

July 27 1865: Fort Delaware transferred from the War Department to the Middle Department. IX Corps (Washington) was discontinued.

August 1 1865: The District of Delaware and the Eastern Shore was discontinued. VIII Corps (Middle) was discontinued.

August 18 1865: Major-General Andrew Atkinson Humphreys assumed temporary command of the Middle Department, succeeding Major-General Winfield Scott Hancock.

October 23 1865: Major-General Andrew Atkinson Humphreys assumed full command of the Middle Department, succeeding Major-General Winfield Scott Hancock.

November 13 1865: Major-General Winfield Scott Hancock assumed command of the Middle Department, succeeding Major-General Andrew Atkinson Humphreys.

December 21 1865: Brigadier-General Emory Upton assumed temporary command of the Middle Department, succeeding Major-General Winfield Scott Hancock.

December 29 1865: Major-General Winfield Scott Hancock assumed command of the Middle Department, succeeding Brigadier-General Emory Upton.

District of Annapolis

(Transferred from Middle Military Division, June 27 1865-July 19 1865, discontinued)

Frederic Dummer Sewall (June 27 1865-July 19 1865)

June 27 1865: The District of Annapolis transferred with the Middle Department to the Military Division of the Atlantic. Colonel Frederic Dummer Sewall retained command of the District of Annapolis.

July 19 1865: The District of Annapolis was discontinued.

District of Delaware and the Eastern Shore

(Transferred from Middle Military Division, June 27 1865-August 1 1865, discontinued)

John Moulder Wilson (June 27 1865-August 1 1865)

June 27 1865: The District of Delaware and the Eastern Shore transferred with the Middle Department to the Military Division of the Atlantic. Colonel John Moulder Wilson retained command of the District of Delaware and the Eastern Shore.

August 1 1865: The District of Delaware and the Eastern Shore was discontinued.

VIII Corps Middle

(Transferred from Middle Military Division, June 27 1865-August 1 1865, discontinued)

Lewis Wallace (June 27 1865-August 1 1865)

June 27 1865: VIII Corps (Middle) transferred from the Middle Military Division to the Military Division of the Atlantic. Major-General Lewis Wallace retained command of VIII Corps (Middle).

August 1 1865: VIII Corps (Middle) was discontinued.

Department of Washington

(Transferred from Middle Military Division, June 27 1865-December 31 1865)

Christopher Columbus Augur (June 27 1865-December 31 1865)

June 27 1865: The Department of Washington transferred from the Middle Military Division to the Military Division of the Atlantic. It was redefined to comprise the District of Columbia, Montgomery county, that part of Anne Arundel county south of the Annapolis & Elkridge Railroad including Annapolis and Prince George’s, Calvert, Charles and St Mary’s counties in Maryland and Alexandria and Fairfax counties in Virginia. These territories were taken from the Middle Department, the Department of the Potomac and the Department of Washington. Major-General Christopher Columbus Augur retained command of the Department of Washington. The District of Alexandria transferred with the Department of Washington to the Military Division of the Atlantic. The District of Washington transferred with the Department of Washington to the Military Division of the Atlantic. IX Corps (Washington) transferred with the Department of Washington to the Military Division of the Atlantic. The District of Alexandria was discontinued.

July 27 1865: IX Corps (Washington) was discontinued.

August 2 1865: The District of Washington was discontinued.

District of Alexandria

(Transferred from Middle Military Division, June 27 1865-July 20 1865, discontinued)

John Potts Slough (June 27 1865-July 20 1865)

June 27 1865: The District of Alexandria transferred with the Department of Washington to the Military Division of the Atlantic. Brigadier-General John Potts Slough retained command of the District of Alexandria.

July 20 1865: The District of Alexandria was discontinued.

District of Washington

(Transferred from Middle Military Division, June 27 1865-August 2 1865, discontinued)

Orlando Bolivar Willcox (June 27 1865-August 2 1865)

June 27 1865: The District of Washington transferred with the Department of Washington to the Military Division of the Atlantic. Brigadier-General Alexander Bolivar Willcox retained command of the District of Washington.

August 2 1865: The District of Washington was discontinued.

IX Corps Washington

(Transferred from Middle Military Division, June 27 1865-July 27 1865, discontinued)

John Grubb Parke (June 27 1865-July 27 1865)

June 27 1865: IX Corps (Washington) transferred with the Department of Washington to the Military Division of the Atlantic. Major-General John Grubb Parke retained command of IX Corps (Washington).

July 27 1865: IX Corps (Washington) was discontinued.

Army of the James

(Transferred from the Military Division of the James, June 27 1865-August 1 1865, discontinued)

Edward Otho Cresap Ord (June 27 1865-August 1 1865)

June 27 1865: The Army of the James transferred from the Military Division of the James, to the Military Division of the Atlantic. Major-General Edward Otho Cresap Ord retained command of the Army of the James. XXIV Corps (James) transferred with the Army of the James to the Military Division of the Atlantic.

August 1 1865: The Army of the James was discontinued. XXIV Corps (James) was discontinued.

XXIV Corps James

(Transferred from the Military Division of the James, June 27 1865-August 1 1865)

John Gibbon (June 27 1865-July 8 1865), John Wesley Turner (July 8 1865-August 1 1865)

June 27 1865: XXIV Corps (James) transferred with the Army of the James to the Military Division of the Atlantic. Major-General John Gibbon retained command of XXIV Corps (James).

July 8 1865: Brigadier-General John Wesley Turner assumed temporary command of XXIV Corps (James), succeeding Major-General John Gibbon.

August 1 1865: XXIV Corps (James) was discontinued.

Army of the Potomac

(Transferred from the Military Division of the James, June 27 1865-June 28 1865)

George Gordon Meade (June 27 1865-June 28 1865)

June 27 1865: The Army of the Potomac transferred from the Department of the Potomac to the Military Division of the Atlantic. Major-General George Gordon Meade retained command of the Army of the Potomac.

June 28 1865: The Army of the Potomac was discontinued. II Corps (Potomac) was discontinued. V Corps (Potomac) was discontinued. VI Corps (Potomac) was discontinued.

II Corps Potomac

(Transferred from the Military Division of the James, June 27 1865-June 28 1865, discontinued)

Andrew Atkinson Humphreys (June 27 1865-June 28 1865)

June 27 17865: II Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic. Major-General Andrew Atkinson Humphreys retained command of II Corps (Potomac)

June 28 1865: II Corps (Potomac) was discontinued.

V Corps Potomac

(Transferred from the Military Division of the James, June 27 1865-June 28 1865, discontinued)

Charles Griffin (June 27 1865-June 28 1865)

June 27 1865: V Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the Atlantic. Major-General Charles Griffin retained command of V Corps (Potomac).

June 28 1865: V Corps (Potomac) was discontinued.

VI Corps Potomac

(Transferred from the Military Division of the James, June 27 1865-June 28 1865, discontinued)

Horatio Gouverneur Wright (June 27 1865-June 28 1865)

VI Corps (Potomac) transferred with the Army of the Potomac to the Military Division of the James. Major-General Horatio Gouverneur Wright retained command of VI Corps (Potomac).

June 28 1865: VI Corps (Potomac) was discontinued.

Military Division of the Gulf

(Established, from Department of the Gulf, June 27 1865-December 31 1865)

Philip Henry Sheridan (June 27 1865-December 31 1865)

June 27 1865: The Military Division of the Gulf was established. It included the Department of Florida, the Department of Mississippi, the Department of Louisiana and the Department of Texas. Major-General Philip Henry Sheridan assumed command of the Military Division of the Gulf. The Department of the Gulf was discontinued, and its territory incorporated into the Department of Louisiana, the Department of Mississippi, the Department of Alabama, the Department of Florida and the Department of Texas. XIII Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf. XVI Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf. The District of Florida was discontinued, and its territory transferred to the Department of Florida. The Department of Florida was established in the Military Division of the Gulf. The Department of Louisiana was established in the Military Division of the Gulf. The Department of Mississippi was established in the Military Division of the Gulf. The Northern District of Mississippi was established in the Department of Mississippi. The Southern District of Mississippi was established in the Department of Mississippi. The Western District of Mississippi was established in the Department of Mississippi. The Department of Texas was established in the Military Division of the Gulf. The Central District of Texas was established in the Department of Texas. The Eastern District of Texas was established in the Department of Texas. The Western District of Texas was established in the Department of Texas.

July 20 1865: XIII Corps (Gulf) was discontinued. XVI Corps (Gulf) was discontinued.

October 7 1865: The Department of Mississippi transferred from the Military Division of the Gulf to the Military Division of the Tennessee.

Department of Florida

(Established, from District of Florida, June 27 1865-December 31 1865)

John Newton (interim June 27 1865-August 1 1865), John Gray Foster (August 1 1865-December 31 1865)

June 27 1865: The Department of Florida was established in the Military Division of the Gulf. It included the state of Florida. The District of Florida was discontinued, and its territory transferred to the Department of Florida. Major-General John Gray Foster was appointed to command the Department of Florida, arriving on August 1st 1865. Brigadier-General John Newton exercised interim command of the Department of Florida.

August 1 1865: Major-General John Gray Foster arrived to command the Department of Florida.

Department of Louisiana

(Established, from Department of the Gulf, June 27 1865-December 31 1865)

Edward Richard Sprigg Canby (June 27 1865-December 31 1865)

June 27 1865: The Department of Louisiana was established in the Military Division of the Gulf. Major-General Edward Richard Sprigg Canby was appointed to command the Department of Louisiana, arriving on July 17th 1865. The District of Baton Rouge transferred from the Department of the Gulf to the Department of Louisiana. The Western District of Louisiana was established in the Department of Louisiana.

July 17 1865: Major-General Edward Richard Sprigg Canby arrived to command the Department of Louisiana. The District of Baton Rouge was discontinued.

July 20 1865: The Western District of Louisiana was discontinued.

July 26 1865: The Eastern District of Louisiana was discontinued.

District of Baton Rouge

(Transferred from Department of the Gulf, June 27 1865-July 17 1865, discontinued)

John Giles Fonda (June 27 1865-July 17 1865)

June 27 1865: The District of Baton Rouge transferred from the Department of the Gulf to the Department of Louisiana. Colonel John Giles Fonda retained command of the District of Baton Rouge.

July 17 1865: The District of Baton Rouge was discontinued.

Eastern District of Louisiana

(Established, from District of East Louisiana, June 27 1865-July 26 1865, discontinued)

Thomas West Sherman (June 27 1865-July 26 1865)

June 27 1865: The Eastern District of Louisiana was established in the Department of Louisiana, comprising the state of Louisiana east of the Mississippi River, the region between the Mississippi and the Atchafalaya and the ports from Brashear to New Iberia to Washington, Louisiana. Brigadier-General Thomas West Sherman assumed command of the Eastern District of Louisiana.

July 26 1865: The Eastern District of Louisiana was discontinued.

Western District of Louisiana

(Established, June 27 1865-July 20 1865, discontinued)

John Parker Hawkins (June 27 1865-July 20 1865)

June 27 1865: The Western District of Louisiana was established in the Department of Louisiana. It comprised the part of Louisiana west of the Mississippi River. Brigadier-General John Parker Hawkins assumed command of the Western District of Louisiana.

July 20 1865: The Western District of Louisiana was discontinued.

Department of Mississippi

(Established, from District of Mississippi, June 27 1865-October 7 1865, transferred to Military Division of the Tennessee)

Henry Warner Slocum (June 27 1865-September 16 1865 interim September 18 1865), Peter Joseph Osterhaus (September 16 1865-October 7 1865)

June 27 1865: The Department of Mississippi was established in the Military Division of the Gulf. The state of Mississippi transferred from the District of Mississippi to the Department of the Gulf to the Department of Mississippi. Major-General Henry Warner Slocum assumed command of the Department of Mississippi, arriving on July 14th 1865. The Northern District of Mississippi was established in the Department of Mississippi. The Southern District of Mississippi was established in the Department of Mississippi. The Western District of Mississippi was established in the Department of Mississippi.

July 14 1865: Major-General Henry Warner Slocum arrived to command the Department of Mississippi.

September 16 1865: Major-General Peter Joseph Osterhaus was appointed to command the Department of Mississippi, arriving on September 18th 1865.

September 18 1865: Major-General Peter Joseph Osterhaus arrived to command the Department of Mississippi, succeeding Major-General Henry Warner Slocum.

October 7 1865: The Department of Mississippi transferred from the Military Division of the Gulf to the Military Division of the Tennessee. The Northern District of Mississippi transferred with the Department of Mississippi to the Military Division of the Tennessee. The Southern District of Mississippi transferred with the Department of Mississippi to the Military Division of the Tennessee. The Western District of Mississippi transferred with the Department of Mississippi to the Military Division of the Tennessee.

Northern District of Mississippi

(Established, from District of Mississippi, June 27 1865-October 7 1865, transferred to Military Division of the Tennessee)

Peter Joseph Osterhaus (June 27 1865-October 7 1865)

June 27 1865: The Northern District of Mississippi was established in the Department of Mississippi. It comprised the vicinity of Jackson, and all counties east and north of the city. Major-General Peter Joseph Osterhaus assumed command of the Northern District of Mississippi.

October 7 1865: The Northern District of Mississippi transferred with the Department of Mississippi to the Military Division of the Tennessee.

Southern District of Mississippi

(Established, from District of Mississippi, June 27 1865-October 7 1865, transferred to Military Division of the Tennessee)

John Wynn Davidson (June 27 1865-October 7 1865)

June 27 1865: The Southern District of Mississippi was established in the Department of Mississippi. It comprised all counties south of the northern lines of Claiborne, Copiah, Lawrence, Covington, Jones and Wayne counties in Mississippi. Brigadier-General John Wynn Davidson assumed command of the Southern District of Mississippi.

October 7 1865: The Southern District of Mississippi transferred with the Department of Mississippi to the Military Division of the Tennessee.

Western District of Mississippi

(Established, from District of Mississippi, June 27 1865-October 7 1865, transferred to Military Division of the Tennessee)

Joseph Adalmorn Maltby (June 27 1865-October 7 1865)

June 27 1865: The Western District of Mississippi was established in the Department of Mississippi. It comprised Bolivar, Sunflower, Washington, Yazoo, Issaquena and Warren counties. Brigadier-General Joseph Adalmorn Maltby assumed command of the Western District of Mississippi.

October 7 1865: The Western District of Mississippi transferred with the Department of Mississippi to the Military Division of the Tennessee.

Department of Texas

(Established, June 27 1865-December 31 1865)

Horatio Gouverneur Wright (June 27 1865-December 31 1865)

June 27 1865: The Department of Texas was established in the Military Division of the Gulf. It comprised the state of Texas. Major-General Horatio Gouverneur Wright was appointed to command the Department of Texas, arriving on 6th August 1865. The Central District of Texas was established in the Department of Texas. The Eastern District of Texas was established in the Department of Texas. The Western District of Texas was established in the Department of Texas.

July 20 1865: The Western District of Texas was discontinued. The Central District of Texas was discontinued. The Eastern District of Texas was discontinued.

August 6 1865: Major-General Horatio Gouverneur Wright arrived to command the Department of Texas.

Central District of Texas

(Established, June 27 1865-July 20 1865, discontinued)

David Sloane Stanley (June 27 1865-July 20 1865)

June 27 1865: The Central District of Texas was established in the Department of Texas. It comprised the region between the Nueces River and the Brazos and Navasota Rivers. Major-General David Sloane Stanley assumed command of the Central District of Texas.

July 20 1865: The Central District of Texas was discontinued.

Eastern District of Texas

(Established, June 27 1865-July 20 1865, discontinued)

Joseph Anthony Mower (June 27 1865-July 20 1865)

June 27 1865: The Eastern District of Texas was established in the Department of Texas. It comprised the region east of the Brazos and Navasotas Rivers. Brigadier-General Major-General Joseph Anthony Mower assumed command of the Eastern District of Texas.

July 20 1865: The Eastern District of Texas was discontinued.

Western District of Texas

(Established, June 27 1865-July 20 1865, discontinued)

Frederick Steele (June 27 1865-July 20 1865)

June 27 1865: The Western District of Texas was established in the Department of Texas. It comprised the state of Texas west of the Nueces River. Major-General Frederick Steele assumed command of the Western District of Texas.

July 20 1976: The Western District of Texas was discontinued.

XIII Corps Gulf

(Transferred from Army of the Gulf, June 27 1865-July 20 1865, discontinued)

Gordon Granger (June 27 1865-July 20 1865)

June 27 1865: XIII Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf. Major-General Gordon Granger retained command of XIII Corps (Gulf).

July 20 1865: XIII Corps (Gulf) was discontinued.

XVI Corps Gulf

(Transferred from Army of the Gulf, June 27 1865-July 20 1865, discontinued)

Andrew Jackson Smith (June 27 1865-July 20 1865)

June 27 1865: XVI Corps (Gulf) transferred from the Army of the Gulf to the Military Division of the Gulf. Major-General Andrew Jackson Smith retained command of XVI Corps (Gulf).

July 20 1865: XVI Corps (Gulf) was discontinued.

Military Division of the Mississippi

(June 27 1865-December 31 1865)

William Tecumseh Sherman (June 27 1865-December 31 1865)

June 27 1865: The Military Division of the Mississippi was reorganised to consist of the Department of the Ohio, the Department of the Missouri and the Department of Arkansas. Major-General William Tecumseh Sherman retained command of the Military Division of the Mississippi. The Army of the Cumberland transferred to the Military Division of the Mississippi. The Department of Arkansas transferred from the Military Division of the Southwest to the Military Division of the Mississippi. The District of Minnesota transferred from the Department of the Northwest to the Department of the Missouri. The Department of the Missouri transferred to the Military Division of the Mississippi. The Department of the Ohio was established in the Military Division of the Mississippi. It comprised Ohio, Michigan, Illinois (except for Alton), and Indiana (except for Jeffersonville and New Albany). Alton, Illinois, transferred from the Department of the Missouri to the Department of the Ohio. The Army of the Tennessee remained subordinate to the Military Division of the Mississippi. XVII Corps (Tennessee) remained transferred to the Army of the Tennessee in the Military Division of the Mississippi. XV Corps (Tennessee) remained with the Army of the Tennessee in the Military Division of the Mississippi. XIV Corps (Mississippi) transferred to the Military Division of the Mississippi.

August 1 1865: The Department of Arkansas was discontinued. The Army of the Cumberland was discontinued. The Army of the Tennessee was discontinued. The Army of Arkansas was discontinued. VII Corps (Arkansas) was discontinued. XIV Corps (Mississippi) was discontinued. XV Corps (Tennessee) was discontinued. XVII Corps (Tennessee) was discontinued.

October 30 1865: The state of Wisconsin transferred from the Department of the Missouri to the Department of the Ohio.

Department of the Ohio

(June 27 1865-December 31 1865)

Edward Otho Cresap Ord (June 27 1865-July 5 1865), Orlando Bolivar Willcox (July 5 1865-December 31 1865)

June 27 1865: The Department of the Ohio was established in the Military Division of the Mississippi. It comprised Ohio, Michigan, Illinois (except for Alton), and Indiana (except for Jeffersonville and New Albany). Alton, Illinois, transferred from the Department of the Missouri to the Department of the Ohio. Major-General Edward Otho Cresap Ord was appointed to command the Department of the Ohio, arriving on 5th July 1865.

July 5 1865: Major-General Edward Otho Cresap Ord arrived to command the Department of the Ohio.

October 30 1865: The state of Wisconsin transferred from the Department of the Missouri to the Department of the Ohio.

December 26 1865: Major-General Orlando Bolivar Willcox assumed temporary command of the Department of the Ohio, succeeding Major-General Edward Otho Cresap Ord.

Department of the Missouri

(June 27 1865-December 31 1865)

Grenville Mellen Dodge (interim June 27 1865-July 21 1865), John Pope (July 21 1865-DecembEr 31 1865)

June 27 1865: The Department of the Missouri transferred to the Military Division of the Mississippi. Fort Garland, Arkansas, transferred from the Department of New Mexico to the Department of the Missouri. Major-General John Pope was appointed to command of the Department of the Missouri, arriving on 21st July 1865. Major-General Grenville Mellen Dodge retained interim command of the Department of the Missouri. Alton, Illinois, transferred from the Department of the Missouri to the Department of the Ohio. The District of Minnesota transferred from the Department of the Northwest to the Department of the Missouri. The Department of New Mexico was discontinued, and its territory transferred to the Department of California and the Department of the Missouri. The District of St Louis transferred with the Department of Missouri to the Military Division of the Mississippi. The District of Southwest Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. The District of Central Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. The District of Rolla transferred with the Department of Missouri to the Military Division of the Mississippi. The District of North Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. The District of the Upper Arkansas transferred with the Department of Missouri to the Military Division of the Mississippi.

July 1 1865: The District of North Missouri was discontinued.

July 10 1865: The District of Central Missouri was discontinued. The District of Rolla was discontinued. The District of Southwest Missouri was discontinued. The District of St Louis was discontinued. The District of the Upper Arkansas was discontinued. The District of Missouri was established in the Department of the Missouri. It consisted of the territories previously in the District of St Louis, the District of Central Missouri and the District of Rolla.

July 21 1865: Major-General John Pope arrived to command the Department of the Missouri, succeeding Major-General Grenville Mellen Dodge.

August 1 1865: The Department of Arkansas was discontinued.

August 22 1865: The District of Missouri was discontinued.

October 30 1865: The state of Wisconsin transferred from the Department of the Missouri to the Department of the Ohio.

District of St Louis

(Transferred to Military Division of the Mississippi, June 27 1865-July 10 1865, to District of Missouri)

James Alexander Williamson (June 27 1865-July 10 1865)

June 27 1865: The District of St Louis transferred with the Department of Missouri to the Military Division of the Mississippi. Brigadier-General James Alexander Williamson retained command of the District of St Louis.

July 10 1865: The District of St Louis was discontinued, and its territory transferred to the District of Missouri.

District of Southwest Missouri

(Transferred to Military Division of the Mississippi, June 27 1865-July 10 1865, discontinued)

Thomas Jefferson McKean (June 27 1865-July 10 1865)

June 27 1865: The District of Southwest Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. Brigadier-General Thomas Jefferson McKean retained command of the District of Southwest Missouri.

July 10 1865: The District of Southwest Missouri was discontinued.

District of Central Missouri

(Transferred to Military Division of the Mississippi, June 27 1865-July 10 1865, discontinued, to District of Missouri)

John Louie Beveridge (June 27 1865-July 10 1865)

June 27 1865: The District of Central Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. Colonel John Lourie Beveridge retained command of the District of Central Missouri.

July 10 1865: The District of Central Missouri was discontinued, and its territory transferred to the District of Missouri.

District of Rolla

(Transferred to Military Division of the Mississippi, June 27 1865-July 10 1865, to District of Missouri)

John Morrill (June 27 1865-July 10 1865)

June 27 1865: The District of Rolla transferred with the Department of Missouri to the Military Division of the Mississippi. Colonel John Morrill retained command of the District of Rolla.

July 10 1865: The District of Rolla was discontinued was discontinued, and its territory transferred to the District of Missouri.

District of North Missouri

(Transferred to Military Division of the Mississippi, June 27 1865-July 1 1865, discontinued)

George Spalding (June 27 1865-July 1 1865)

June 27 1865: The District of North Missouri transferred with the Department of Missouri to the Military Division of the Mississippi. Colonel George Spalding retained command of the District of North Missouri.

July 1 1865: The District of North Missouri was discontinued.

District of the Upper Arkansas

(Transferred to Military Division of the Mississippi, June 27 1865-July 10 1865, discontinued)

James Hobart Ford (June 27 1865-July 10 1865)

June 27 1865: The District of the Upper Arkansas transferred with the Department of Missouri to the Military Division of the Mississippi. Colonel James Hobart Ford retained command of the District of the Upper Arkansas.

July 10 1865: The District of the Upper Arkansas was discontinued.

District of Minnesota

(Transferred from Department of the Northwest, June 27 1865-December 31 1865)

Henry Hastings Sibley (June 27 1865-December 31 1865)

June 27 1865: The District of Minnesota transferred from the Department of the Northwest to the Department of the Missouri. Brigadier-General Henry Hastings Sibley retained command of the District of Minnesota.

District of Missouri

(Established, July 10 1865-August 22 1865, discontinued)

James Alexander Williamson (July 10 1865-July 21 1865), Thomas Church Haskell Smith (July 21 1865-August 22 1865)

July 10 1865: The District of Missouri was established in the Department of the Missouri. It consisted of the territories previously in the District of St Louis, the District of Central Missouri and the District of Rolla. Brigadier-General James Alexander Williamson assumed command of the District of Missouri.

July 21 1865: Brigadier-General Thomas Church Haskell Smith assumed command of the District of Missouri, succeeding Brigadier-General James Alexander Williamson.

August 22 1865: The District of Missouri was discontinued.

Department of Arkansas

(Transferred from Military Division of the Southwest, June 27 1865-August 1 1865, discontinued)

Joseph Jones Reynolds (June 27 1865-August 1 1865)

June 27 1865: The Department of Arkansas transferred from the Military Division of the Southwest to the Military Division of the Mississippi. Major-General Joseph Jones Reynolds retained command of the Department of Arkansas. The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Mississippi. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Mississippi.

August 1 1865: The Department of Arkansas was discontinued. The Army of Arkansas was discontinued. VII Corps (Arkansas) was discontinued.

Army of Arkansas

(Transferred from Military Division of the Southwest, June 27 1865-August 1 1865, discontinued)

Joseph Jones Reynolds (June 27 1865-August 1 1865)

June 27 1865: The Army of Arkansas transferred with the Department of Arkansas to the Military Division of the Mississippi. VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Mississippi. Major-General Joseph Jones Reynolds retained command of the Army of Arkansas.

August 1 1865: The Army of Arkansas was discontinued. VII Corps (Arkansas) was discontinued.

VII Corps Arkansas

(Transferred from Military Division of the Southwest, June 27 1865-August 1 1865, discontinued)

Joseph Jones Reynolds (June 27 1865-August 1 1865)

June 27 1865: VII Corps (Arkansas) transferred with the Army of Arkansas to the Military Division of the Mississippi.

June 27 1865: Major-General Joseph Jones Reynolds retained command of VII Corps (Arkansas).

August 1 1865: VII Corps (Arkansas) was discontinued.

Army of the Cumberland

(Transferred from Department of the Cumberland, June 27 1865-August 1 1865, discontinued)

George Henry Thomas (June 27 1865-August 1 1865)

June 27 1865: The Army of the Cumberland transferred to the Military Division of the Mississippi. Major-General George Henry Thomas retained command of the Army of the Cumberland.

August 1 1865: The Army of the Cumberland was discontinued.

Army of the Tennessee

(Military Division of the Mississippi, June 27 1865-August 1 1865, discontinued)

John Alexander Logan (June 27 1865-August 1 1865)

June 27 1865: The Army of the Tennessee remained subordinate to the Military Division of the Mississippi. Major-General John Alexander Logan retained command of the Army of the Tennessee. XVII Corps (Tennessee) remained transferred to the Army of the Tennessee in the Military Division of the Mississippi. XV Corps (Tennessee) remained with the Army of the Tennessee in the Military Division of the Mississippi.

August 1 1865: The Army of the Tennessee was discontinued. XV Corps (Tennessee) was discontinued. XVII Corps (Tennessee) was discontinued.

XVII Corps Tennessee

(Military Division of the Mississippi, June 27 1865-August 1 1865, discontinued)

Mortimer Dormer Leggett (June 27 1865-July 1 1865), Francis Preston Blair (July 1 1865-July 19 1865), William Worth Belknap (July 19 1865-August 11 865)

June 27 1865: XVII Corps (Tennessee) remained transferred to the Army of the Tennessee in the Military Division of the Mississippi. Brigadier-General Mortimer Dormer Leggett retained command of XVII Corps (Tennessee).

July 1 1865: Major-General Francis Preston Blair assumed command of XVII Corps (Tennessee), succeeding Brigadier-General Mortimer Dormer Leggett.

July 19 1865: Brigadier-General William Worth Belknap assumed command of XVII Corps (Tennessee), succeeding Major-General Francis Preston Blair.

August 1 1865: XVII Corps (Tennessee) was discontinued.

XV Corps Tennessee

(Military Division of the Mississippi, June 27 1865-August 1 1865, discontinued)

William Babcock Hazen (June 27 1865-August 1 1865)

June 27 1865: XV Corps (Tennessee) remained with the Army of the Tennessee in the Military Division of the Mississippi. Major-General William Babcock Hazen retained command of XV Corps (Tennessee).

August 1 1865: XV Corps (Tennessee) was discontinued.

XIV Corps Mississippi

(Military Division of the Mississippi, June 27 1865-August 1 1865, discontinued)

Jefferson Columbus Davis (June 27 1865-August 1 1865)

June 27 1865: XIV Corps (Mississippi) remained transferred to the Military Division of the Mississippi. Brigadier-General Jefferson Columbus Davis retained command of XIV Corps (Mississippi).

August 1 1865: XIV Corps (Mississippi) was discontinued.

Military Division of the Tennessee

(Established from Department of the Tennessee, June 27 1865-December 31 1865)

George Henry Thomas (June 27 1865-December 31 1865)

. June 27 1865: The Military Division of the Tennessee was established. It comprised the Department of Tennessee, the Department of Kentucky, the Department of Alabama and the Department of Georgia. Major-General George Henry Thomas assumed command of the Military Division of the Tennessee. The Department of Alabama was established. The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee. The Department of Tennessee was established in the Military Division of the Tennessee. The Department of Georgia was established in the Military Division of the Tennessee.

October 7 1865: The Department of Mississippi transferred from the Military Division of the Gulf to the Military Division of the Tennessee.

Department of Tennessee

(Established, June 27 1865-December 31 1865)

George Stoneman (June 27 1865-December 31 1865)

June 27 1865: The Military Division of the Tennessee was established. It comprised the Department of Tennessee, the Department of Kentucky, the Department of Alabama and the Department of Georgia. The Department of Tennessee was established in the Military Division of the Tennessee. It comprised the state of Tennessee. Major-General George Stoneman was appointed to command the Department of Tennessee, arriving on 1st July 1865.

July 1 1865: Major-General George Stoneman arrived to command the Department of Tennessee.

Department of Alabama

(Established, from District of Alabama, June 27 1865-December 31 1865)

Charles Robert Woods (June 27 1865-December 31 1865)

June 27 1865: The Department of the Gulf was discontinued, and its territory incorporated into the Department of Louisiana, the Department of Mississippi, the Department of Alabama, the Department of Florida and the Department of Texas. The Military Division of the Tennessee was established. It comprised the Department of Tennessee, the Department of Kentucky, the Department of Alabama and the Department of Georgia. The Department of Alabama was established, comprising the state of Alabama. It transferred to the Military Division of the Tennessee. Brigadier-General Charles Robert Woods was appointed to command the Department of Alabama, arriving on 18th July 1865. The District of Northern Alabama transferred to the Department of Alabama.

July 18 1865: Brigadier-General Charles Robert Woods arrived to command the Department of Alabama.

District of Northern Alabama

(Transferred from Department of the Cumberland, June 27 1865-September 10 1865, discontinued, to Department of Alabama)

Robert Seaman Granger (June 27 1865-September 10 1865)

June 27 1865: The District of Northern Alabama transferred to the Department of Alabama. Brigadier-General Robert Seaman Granger retained command of the District of Northern Alabama.

August 24 1865: Command of the District of Northern Alabama became vacant.

September 10 1865: The District of Northern Alabama was discontinued.

Department of Georgia

(Established, June 27 1865-December 31 1865)

James Blair Steedman June 29 1865-December 20 1865), James Harrison Wilson (December 20 1865-)

June 27 1865: The Department of Georgia was established in the Military Division of the Tennessee. It comprised the state of Georgia. Major-General James Blair Steedman was appointed to command the Department of Georgia, arriving on 29th June 1865.

June 29 1865: Major-General James Blair Steedman arrived to command the Department of Georgia.

December 20 1865: Major-General James Harrison Wilson assumed command of the Department of Georgia, succeeding Major-General James Blair Steedman.

Department of Kentucky

(Transferred from Military Division of the Mississippi, June 27 1865-December 31 1865)

Edward Henry Hobson (June 27 1865-December 31 1865)

June 27 1865: The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee. Major-General John McAuley Palmer assumed command of the Department of Kentucky, succeeding Brigadier-General Edward Henry Hobson.

Department of Mississippi

(Transferred from Military Division of the Gulf, October 7 1865-December 31 1865)

Peter Joseph Osterhaus (October 7 1865-November 14 1865), Thomas John Wood (November 14 1865-December 31 1865)

October 7 1865: The Department of Mississippi transferred from the Military Division of the Gulf to the Military Division of the Tennessee. Major-General Peter Joseph Osterhaus retained command of the Department of Mississippi. The Northern District of Mississippi transferred with the Department of Mississippi from the Military Division of the Gulf to the Military Division of the Tennessee. The Southern District of Mississippi transferred with the Department of Mississippi from the Military Division of the Gulf to the Military Division of the Tennessee. The Western District of Mississippi transferred with the Department of Mississippi from the Military Division of the Gulf to the Military Division of the Tennessee.

November 14 1865: Major-General Thomas John Wood assumed command of the Department of Mississippi, succeeding Major-General Peter Joseph Osterhaus.

Northern District of Mississippi

(Transferred from Military Division of the Gulf, October 7 1865-December 31 1865)

Peter Joseph Osterhaus (October 7 1865-December 31 1865)

October 7 1865: The Northern District of Mississippi transferred with the Department of Mississippi from the Military Division of the Gulf to the Military Division of the Tennessee. Major-General Peter Joseph Osterhaus retained command of the Northern District of Mississippi.

Southern District of Mississippi

(Transferred from Military Division of the Gulf, October 7 1865-December 31 1865)

John Wynn Davidson (October 7 1865-December 31 1865)

October 7 1865: The Southern District of Mississippi transferred with the Department of Mississippi from the Military Division of the Gulf to the Military Division of the Tennessee. Brigadier-General John Wynn Davidson retained command of the Southern District of Mississippi.

 

Western District of Mississippi

(Transferred from Military Division of the Gulf, October 7 1865-December 31 1865)

Joseph Adalmorn Maltby (October 7 1865-December 31 1865)

October 7 1865: The Western District of Mississippi transferred with the Department of Mississippi from the Military Division of the Gulf to the Military Division of the Tennessee. Brigadier-General Joseph Adalmorn Maltby retained command of the Northern District of Mississippi.

Part 5: Staff Bureaux

General in Chief of the US Army

Major-General Winfield Scott 25 June 1841-November 1 1861

Major-General George Brinton McClellan November 1 1861-March 17 1862 (July 22 1862)

(Major-General Ethan Allen Hitchcock Chairman of the War Board March 17 1862-July 22 1862 interim)

Major-General Henry Wager Halleck July 11 1862-March 4 1864

Lieutenant-General USA Ulysses Simpson Grant March 4 1864-December 31 1865

Inspector-General’s Department

Colonel Sylvester Churchill, Inspector-General 25 June 1841-August 9 1861

Colonel Randolph Barnes Marcy, Inspector-General August 9 1861-September 23 1861

Brigadier-General Randolph Barnes Marcy, Inspector-General 23 September 1861-December 31 1865

Adjutant-General’s Department

Colonel Samuel Cooper, Adjutant-General 15 July 1852-March 7 1861

Colonel Lorenzo Thomas, Adjutant-General March 7 1861-July 1 1861

Colonel Catharinus Putnam Buckingham, Adjutant-General July 1 1861-August 3 1861

Brigadier-General Lorenzo Thomas August 3 1861-March 23 1863

Colonel Edward David Townsend, Adjutant-General March 23 1863-December 31 1865

Engineers

Colonel Joseph Gilbert Totten, Chief of Engineers 7 December 1838-March 3 1863

Brigadier-General Joseph Gilbert Totten, Chief of Engineers 3 March 1863-April 22 1864

Brigadier-General Richard Delafield, Chief of Engineers April 22 1864-June 5 1864

Brigadier-General John Gross Barnard, Chief of Engineers June 5 1864-December 31 1865

Ordnance

Lieutenant-Colonel Henry Knox Craig, Chief of Ordnance 10 July 1851-April 23 1861

Colonel James Wolfe Ripley, Chief of Ordnance April 23 1861-August 3 1861

Brigadier-General James Wolfe Ripley, Chief of Ordnance August 3 1861-September 15 1863

Brigadier-General George Douglas Ramsay, Chief of Ordnance September 15 1863-September 12 1864

Brigadier-General Alexander Brydie Dyer, Chief of Ordnance September 12 1864-December 31 1865

Paymaster-General’s Department

Colonel Benjamin Franklin Larned, Paymaster-General 20 July 1854-July 12 1862

Lieutenant-Colonel Timothy Patrick Andrews, Acting Paymaster-General July 12 1862-September 6 1862

Colonel Timothy Patrick Andrew, Paymaster-General September 6 1862-November 29 1864

Colonel Benjamin Wilson Brice, Paymaster-General November 29 1864-December 31 1865

Quartermaster-General’s Department

Brigadier-General Joseph Eggleston Johnston, Quartermaster-General 28 June 1860-April 22 1861

Brigadier-General Montgomery Cunningham Meigs, Quartermaster-General May 15 1861-December 31 1865

Commissary Department

Colonel George Gibson, Commissary-General of Subsistence 18 April 1818-September 21 1861

Colonel Joseph Pannell Taylor, Commissary-General of Subsistence September 21 1861-September 29 1861

Brigadier-General Joseph Pannell Taylor, Commissary-General of Subsistence September 29 1861-June 29 1864.

Brigadier-General Amos Beebe Eaton, Commissary-General of Subsistence June 29 1864-December 31 1865

Surgeon-General’s (Medical) Department

Colonel Thomas Lawson, Surgeon-General November 30 1836-May 15 1861

Colonel Clement Alexander Finley, Surgeon-General May 15 1861-April 14 1862

Surgeon Robert C Wood, Acting Surgeon-General April 14 1862-April 25 1862

Brigadier-General William Alexander Hammond, Surgeon-General April 25 1862-August 18 1864

Colonel Joseph K Barnes, Surgeon-General August 18 1864

Brigadier-General Joseph K Barnes, Surgeon-General August 22 1864-December 31 1865

Topographical Engineers

Colonel John James Abert, Chief of Topographical Engineers 1838-September 1861-1863

Judge Advocate-General’s Department

Captain John Fitzgerald Lee, Judge Advocate-General March 2 1849-September 3 1862

Colonel Joseph Holt, Judge Advocate-General September 3 1862-June 22 1864

Brigadier-General Joseph Holt, Judge Advocate-General June 22 1864-December 31 1865

Provost Marshal General’s Department

Brigadier-General James Barnet Fry, Provost Marshal General April 21 1864-December 31 1865

 

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