Union Wartime Organisation: Western Theatre

Union Wartime Organisation

Western Theatre

April 1861-June 1865

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 from 1862 to 1864. The 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).

Union High Command on April 11 1861 Western Theatre

  • Department of the West: William Selby Harney

Department of Kentucky

Union High Command on May 28 1861 Western Theatre

  • Department of Kentucky: Robert Anderson
  • Department of the Ohio: George Brinton McClellan
  • Department of the West: William Selby Harney

(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

Union High Command on August 15 1861 Western Theatre

  • Department of the Cumberland: Robert Anderson awaited
  • Department of the Ohio: William Starke Rosecrans
    • Cheat Mountain District: Joseph Jones Reynolds
    • Cheat River District: Charles J Biddle
    • District of Grafton: Benjamin Franklin Kelley
    • Army of Occupation: William Starke Rosecrans
  • Western Department: John Charles Frémont
    • District of Ironton: Benjamin Mayberry Prentiss
    • District of North Missouri: John Pope
    • Southern District of New Mexico: Benjamin Stone Roberts

(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

Union High Command on November 9 1861 Western Theatre

  • Department of the Missouri: Henry Wager Halleck
    • District of Southeast Missouri: Ulysses Simpson Grant
    • District of Western Kentucky: Charles Ferguson Smith
  • Department of the Ohio: Ormsby McKnight Mitchel interim Don Carlos Buell awaited
    • District of Grafton: Benjamin Franklin Kelley
    • Army of the Ohio: Don Carlos Buell awaited

(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

Union High Command on May 3 1861 Western Theatre

  • Department of the Ohio: George Brinton McClellan awaited
  • Department of the West: Edmund Brooke Alexander temporary

(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 21stSeptember 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

Union High Command on March 11 1862 Western Theatre

  • Department (Military Division) of the Mississippi : Henry Wager Halleck awaited
    • Department of the Missouri: Henry Wager Halleck
      • District of West Tennessee: Charles Ferguson Smith
      • District of the Mississippi: John Pope
      • District of St Louis: John McAllister Schofield
      • District of Central Missouri: James Totten
      • District of Southeast Missouri: Frederick Steele
      • District of Southwest Missouri: Samuel Ryan Curtis
        • Army of the Southwest: Samuel Ryan Curtis
    • Department of Kansas: David Hunter
    • Army of the Mississippi: John Pope
    • Army of the Ohio: Don Carlos Buell
    • Army of West Tennessee: Ulysses Simpson Grant

(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

Union High Command on March 11 1862 Western Theatre

  • Department (Military Division) of the Mississippi : Henry Wager Halleck awaited
    • Department of the Missouri: Henry Wager Halleck
      • District of West Tennessee: Charles Ferguson Smith
      • District of the Mississippi: John Pope
      • District of St Louis: John McAllister Schofield
      • District of Central Missouri: James Totten
      • District of Southeast Missouri: Frederick Steele
      • District of Southwest Missouri: Samuel Ryan Curtis
        • Army of the Southwest: Samuel Ryan Curtis
    • Department of Kansas: David Hunter
    • Army of the Mississippi: John Pope
    • Army of the Ohio: Don Carlos Buell
    • Army of West Tennessee: Ulysses Simpson Grant

(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-April 21 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-April 12 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

Union High Command on March 11 1862 Western Theatre

  • Department (Military Division) of the Mississippi : Henry Wager Halleck awaited
    • Department of the Missouri: Henry Wager Halleck
      • District of West Tennessee: Charles Ferguson Smith
      • District of the Mississippi: John Pope
      • District of St Louis: John McAllister Schofield
      • District of Central Missouri: James Totten
      • District of Southeast Missouri: Frederick Steele
      • District of Southwest Missouri: Samuel Ryan Curtis
        • Army of the Southwest: Samuel Ryan Curtis
    • Department of Kansas: David Hunter
    • Army of the Mississippi: John Pope
    • Army of the Ohio: Don Carlos Buell
    • Army of West Tennessee: Ulysses Simpson Grant

(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

Union High Command on July 16 1862 Western Theatre

  • Department (Military Division) of the Mississippi : Henry Wager Halleck
    • Department of the Missouri: Henry Wager Halleck
      • District of West Tennessee: Ulysses Simpson Grant
        • Sub-District of Jackson: John Alexander McClernand
      • District of Cairo: William Kerley Strong
      • District of Missouri: John McAllister Schofield
      • District of Southwest Missouri: Egbert Benson Brown
        • Army of the Southwest: Samuel Ryan Curtis
    • District of Northwest Missouri: vacant
    • District of Corinth: William Starke Rosecrans
    • Army of the Mississippi: William Starke Rosecrans
    • Army of the Ohio: Don Carlos Buell
    • Army of West Tennessee: George Henry Thomas
  • District of the Ohio: Don Carlos Buell

(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

Union High Command on August 19 1862 Western Theatre

  • Department (Military Division) of the Mississippi : Henry Wager Halleck
    • Department of the Missouri: Henry Wager Halleck
      • District of West Tennessee: Ulysses Simpson Grant
        • Sub-District of Jackson: John Alexander McClernand
      • District of Missouri: John McAllister Schofield
      • District of Southwest Missouri: Egbert Benson Brown
        • Army of the Southwest: Samuel Ryan Curtis
    • District of Northwest Missouri: vacant
    • District of Corinth: William Starke Rosecrans
    • Army of the Mississippi: William Starke Rosecrans
    • Army of West Tennessee: George Henry Thomas
  • Department of the Ohio: Horatio Gouverneur Wright awaited
    • Army of the Ohio: Don Carlos Buell
  • District of the Ohio: Don Carlos Buell

(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 around 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.

Union High Command on September 19 1862 Western Theatr

October 16 1863: IX Corps (Ohio) transferred with the Army of the Ohio to the Military Division of the Mississippi.


District of West Tennessee

Union High Command on September 19 1862 Western Theatre

  • Department of the Missouri: Henry Wager Halleck
    • District of Missouri: John McAllister Schofield
    • District of St Louis: John Wynn Davidson
    • District of Southwest Missouri: Egbert Benson Brown
      • Army of the Southwest: Frederick Steele
    • District of Northwest Missouri: Willard Preble Hall
    • Army of the Mississippi: William Starke Rosecrans
    • Army of West Tennessee: George Henry Thomas
  • Department of the Ohio: Horatio Gouverneur Wright
    • District of Louisville: Jeremiah Tilford Boyle
    • Sub-District of the Kanawha: Joseph Andrew Jackson Lightburn
    • Army of the Ohio: Don Carlos Buell
  • District of the Ohio: Don Carlos Buell
  • District of West Tennessee: Ulysses Simpson Grant
    • District of Corinth: William Starke Rosecrans
    • Sub-District of Jackson: John Alexander Logan

(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

Union High Command on October 16 1862 Western Theatre

  • Department of the Missouri: Samuel Ryan Curtis
    • District of St Louis: John Wynn Davidson
    • District of Southwest Missouri: John McAllister Schofield
      • Army of the Southwest: Eugene Asa Carr
    • District of Northeast Missouri: Lewis Merrill
    • District of Northwest Missouri: Willard Preble Hall
    • District of Central Missouri: Benjamin Franklin Loan
    • Army of the Mississippi: William Starke Rosecrans
    • Army of the Frontier: John McAllister Schofield
  • Department of the Ohio: Horatio Gouverneur Wright
    • District of Louisville: Jeremiah Tilford Boyle
    • District of Western Virginia: Jacob Dolson Cox
      • Sub-District of the Kanawha: Eliakim Parker Scammon
    • Cheat Mountain District: Robert Huston Milroy
    • Army of the Ohio: Don Carlos Buell
      • I Corps Ohio: Alexander McDowell McCook
      • II Corps Ohio: Thomas Leonidas Crittenden
      • III Corps Ohio: Gordon Granger
  • Department of the Tennessee: Ulysses Simpson Grant awaited
    • District of Corinth: William Starke Rosecrans
    • District of Jackson: Stephen Augustus Hurlbut
    • Army of the Tennessee: Ulysses Simpson Grant
  • District of the Ohio: Don Carlos Buell

(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

Union High Command on October 24 1862 Western Theatre

  • Department of the Cumberland: William Starke Rosecrans awaited
    • Army of the Cumberland: William Starke Rosecrans
      • XIV Corps Cumberland: William Starke Rosecrans
        • Right Wing XIV Corps Cumberland: Alexander McDowell McCook
        • Left Wing XIV Corps Cumberland: Thomas Leonidas Crittenden
        • Centre XIV Corps Cumberland: Charles Champion Gilbert
        • Cavalry Corps Cumberland: John Kennett temporary
  • Department of the Ohio: Horatio Gouverneur Wright
    • District of Louisville: Jeremiah Tilford Boyle
    • District of Western Virginia: Jacob Dolson Cox
      • Sub-District of the Kanawha: Eliakim Parker Scammon
    • Cheat Mountain District: Robert Huston Milroy
  • Department of the Tennessee: Ulysses Simpson Grant awaited
    • District of Corinth: Charles Smith Hamilton
    • District of Jackson: Stephen Augustus Hurlbut
    • Army of the Tennessee: Ulysses Simpson Grant
      • XIII Corps Tennessee: Ulysses Simpson Grant

(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

Union High Command on October 16 1863 Western Theatre

  • Military Division of the Mississippi: Ulysses Simpson Grant awaited
    • Department of the Cumberland: William Starke Rosecrans
      • Army of the Cumberland: William Starke Rosecrans
        • IV Corps Cumberland: Gordon Granger
        • XIV Corps Cumberland: George Henry Thomas
        • Cavalry Corps Cumberland: Robert Byington Mitchell temporary
        • Hooker’s Command Cumberland: Joseph Hooker
          • XI Corps Cumberland: Oliver Otis Howard
          • XII Corps Cumberland: Henry Warner Slocum
    • Department of the Ohio: Ambrose Everett Burnside
      • District of Kentucky: Jeremiah Tilford Boyle
      • District of Eastern Kentucky: George W Gallup
      • District of Western Kentucky: Jeremiah Tilford Boyle
      • District of Illinois: Jacob Ammen
      • District of Indiana: John Smith Simonson
      • District of Ohio: Jacob Dolson Cox
      • Army of the Ohio: Ambrose Everett Burnside
        • IX Corps Ohio: Ambrose Everett Burnside
        • XXIII Corps Ohio: Mahlon Dickerson Manson
    • Department of the Tennessee: Ulysses Simpson Grant
      • District of West Tennessee: Stephen Augustus Hurlbut
        • Sub-District of Memphis: James Clifford Veatch
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Northeast Louisiana: John Parker Hawkins
      • Army of the Tennessee: Ulysses Simpson Grant
        • XV Corps Tennessee: William Tecumseh Sherman
        • XVI Corps Tennessee: Napoleon Jackson Tecumseh Dana
          • Left Wing XVI Corps Tennessee: Grenville Mellen Dodge
        • XVII Corps Tennessee: James Birdseye McPherson

(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 ofthe Mississippi, arriving on 18thOctober 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

Union High Command on October 16 1863 Western Theatre

  • Military Division of the Mississippi: Ulysses Simpson Grant awaited
    • Department of the Cumberland: William Starke Rosecrans
      • Army of the Cumberland: William Starke Rosecrans
        • IV Corps Cumberland: Gordon Granger
        • XIV Corps Cumberland: George Henry Thomas
        • Cavalry Corps Cumberland: Robert Byington Mitchell temporary
        • Hooker’s Command Cumberland: Joseph Hooker
          • XI Corps Cumberland: Oliver Otis Howard
          • XII Corps Cumberland: Henry Warner Slocum
    • Department of the Ohio: Ambrose Everett Burnside
      • District of Kentucky: Jeremiah Tilford Boyle
      • District of Eastern Kentucky: George W Gallup
      • District of Western Kentucky: Jeremiah Tilford Boyle
      • District of Illinois: Jacob Ammen
      • District of Indiana: John Smith Simonson
      • District of Ohio: Jacob Dolson Cox
      • Army of the Ohio: Ambrose Everett Burnside
        • IX Corps Ohio: Ambrose Everett Burnside
        • XXIII Corps Ohio: Mahlon Dickerson Manson
    • Department of the Tennessee: Ulysses Simpson Grant
      • District of West Tennessee: Stephen Augustus Hurlbut
        • Sub-District of Memphis: James Clifford Veatch
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Northeast Louisiana: John Parker Hawkins
      • Army of the Tennessee: Ulysses Simpson Grant
        • XV Corps Tennessee: William Tecumseh Sherman
        • XVI Corps Tennessee: Napoleon Jackson Tecumseh Dana
          • Left Wing XVI Corps Tennessee: Grenville Mellen Dodge
        • XVII Corps Tennessee: James Birdseye McPherson

(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

Union High Command on October 16 1863 Western Theatre

  • Military Division of the Mississippi: Ulysses Simpson Grant awaited
    • Department of the Cumberland: William Starke Rosecrans
      • Army of the Cumberland: William Starke Rosecrans
        • IV Corps Cumberland: Gordon Granger
        • XIV Corps Cumberland: George Henry Thomas
        • Cavalry Corps Cumberland: Robert Byington Mitchell temporary
        • Hooker’s Command Cumberland: Joseph Hooker
          • XI Corps Cumberland: Oliver Otis Howard
          • XII Corps Cumberland: Henry Warner Slocum
    • Department of the Ohio: Ambrose Everett Burnside
      • District of Kentucky: Jeremiah Tilford Boyle
      • District of Eastern Kentucky: George W Gallup
      • District of Western Kentucky: Jeremiah Tilford Boyle
      • District of Illinois: Jacob Ammen
      • District of Indiana: John Smith Simonson
      • District of Ohio: Jacob Dolson Cox
      • Army of the Ohio: Ambrose Everett Burnside
        • IX Corps Ohio: Ambrose Everett Burnside
        • XXIII Corps Ohio: Mahlon Dickerson Manson
    • Department of the Tennessee: Ulysses Simpson Grant
      • District of West Tennessee: Stephen Augustus Hurlbut
        • Sub-District of Memphis: James Clifford Veatch
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Northeast Louisiana: John Parker Hawkins
      • Army of the Tennessee: Ulysses Simpson Grant
        • XV Corps Tennessee: William Tecumseh Sherman
        • XVI Corps Tennessee: Napoleon Jackson Tecumseh Dana
          • Left Wing XVI Corps Tennessee: Grenville Mellen Dodge
        • XVII Corps Tennessee: James Birdseye McPherson

(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

Union High Command on October 16 1863 Western Theatre

  • Military Division of the Mississippi: Ulysses Simpson Grant awaited
    • Department of the Cumberland: William Starke Rosecrans
      • Army of the Cumberland: William Starke Rosecrans
        • IV Corps Cumberland: Gordon Granger
        • XIV Corps Cumberland: George Henry Thomas
        • Cavalry Corps Cumberland: Robert Byington Mitchell temporary
        • Hooker’s Command Cumberland: Joseph Hooker
          • XI Corps Cumberland: Oliver Otis Howard
          • XII Corps Cumberland: Henry Warner Slocum
    • Department of the Ohio: Ambrose Everett Burnside
      • District of Kentucky: Jeremiah Tilford Boyle
      • District of Eastern Kentucky: George W Gallup
      • District of Western Kentucky: Jeremiah Tilford Boyle
      • District of Illinois: Jacob Ammen
      • District of Indiana: John Smith Simonson
      • District of Ohio: Jacob Dolson Cox
      • Army of the Ohio: Ambrose Everett Burnside
        • IX Corps Ohio: Ambrose Everett Burnside
        • XXIII Corps Ohio: Mahlon Dickerson Manson
    • Department of the Tennessee: Ulysses Simpson Grant
      • District of West Tennessee: Stephen Augustus Hurlbut
        • Sub-District of Memphis: James Clifford Veatch
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Northeast Louisiana: John Parker Hawkins
      • Army of the Tennessee: Ulysses Simpson Grant
        • XV Corps Tennessee: William Tecumseh Sherman
        • XVI Corps Tennessee: Napoleon Jackson Tecumseh Dana
          • Left Wing XVI Corps Tennessee: Grenville Mellen Dodge
        • XVII Corps Tennessee: James Birdseye McPherson

(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 1864)
  • 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 the Mississippi

Union High Command November 28 1864 Western Theatre

  • Military Division of the Mississippi: William Tecumseh Sherman
    • Department of the Cumberland: George Henry Thomas
      • District of Tennessee: Lovell Harrison Rousseau
      • District of Northern Alabama: Robert Seaman Granger
      • District of Etowah: James Blair Steedman
      • Army of the Cumberland: George Henry Thomas
        • IV Corps Cumberland: David Sloane Stanley
    • Department of the Ohio: George Stoneman temporary
      • District of East Tennessee: Jacob Ammen
      • District of Kentucky: Stephen Gano Burbridge
      • Army of the Ohio: John McAllister Schofield
        • XXIII Corps Ohio: John McAllister Schofield
    • Department of the Mississippi: Napoleon Jackson Tecumseh Dana awaited
      • District of West Tennessee: Napoleon Jackson Tecumseh Dana
      • District of Vicksburg: Napoleon Jackson Tecumseh Dana
    • Army of the Tennessee: Oliver Otis Howard
        • XV Corps Tennessee: Peter Joseph Osterhaus
        • Detachment Army of the Tennessee (XVI Corps) Andrew Jackson Smith
        • XVII Corps Tennessee: Francis Preston Blair
    • Army of Georgia: Henry Warner Slocum
        • XIV Corps Georgia: Jefferson Columbus Davis
        • XX Corps Georgia: Alpheus Starkey Williams
    • Cavalry Corps Mississippi: James Harrison Wilson
  • Northern Department: Joseph Hooker
    • District of Illinois: John Cook
    • District of Indiana: Alvin Peterson Hovey
    • District of Michigan: Bennett Hoskin Hill

(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 the Mississippi#. 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.


Department of North Carolina

Union High Command January 31 1865 Western Theatre

  • Military Division of the Mississippi: William Tecumseh Sherman
    • Department of the Cumberland: George Henry Thomas
      • District of Tennessee: Lovell Harrison Rousseau
      • District of East Tennessee: Davis Tillson
      • District of Kentucky: Stephen Gano Burbridge
      • District of Northern Alabama: Robert Seaman Granger
      • District of Etowah: James Blair Steedman
      • Army of the Cumberland: George Henry Thomas
        • IV Corps Cumberland: David Sloane Stanley
    • Department of the Mississippi: Napoleon Jackson Tecumseh Dana
      • District of West Tennessee: James Clifford Veatch
      • District of Vicksburg: Cadwallader Colden Washburn
      • District of Natchez: John Wynn Davidson
    • Department of North Carolina: John Gray Foster interim John McAllister Schofield awaited
      • District of North Carolina: Innis Newton Palmer
        • Sub-District of Beaufort NC: James Stewart
      • Army of the James: Edward Otho Cresap Ord
        • XXIV Corps James: John Gibbon
        • XXV Corps James: Charles Adam Heckman
      • Terry’s Provisional Corps North Carolina: Alfred Howe Terry
    • Army of the Tennessee: Oliver Otis Howard
        • XV Corps Tennessee: John Alexander Logan
        • Detachment Army of the Tennessee (XVI Corps) Andrew Jackson Smith
        • XVII Corps Tennessee: Francis Preston Blair
    • Army of Georgia: Henry Warner Slocum
        • XIV Corps Georgia: Jefferson Columbus Davis
        • XX Corps Georgia: Alpheus Starkey Williams
    • Army of the Ohio: John McAllister Schofield
      • XXIII Corps Ohio: John McAllister Schofield
    • Cavalry Corps Mississippi: James Harrison Wilson
  • Northern Department: Joseph Hooker
    • District of Illinois: John Cook
    • District of Indiana: Alvin Peterson Hovey
    • District of Michigan: Bennett Hoskin Hill

(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

Union High Command February 10 1865 Western Theatre

  • Military Division of the Mississippi: William Tecumseh Sherman
    • Department of the Cumberland: George Henry Thomas
      • District of Tennessee: Lovell Harrison Rousseau
      • District of East Tennessee: Davis Tillson
      • District of West Tennessee: Benjamin Stone Roberts
      • District of Northern Alabama: Robert Seaman Granger
      • District of Etowah: James Blair Steedman
      • Army of the Cumberland: George Henry Thomas
        • IV Corps Cumberland: David Sloane Stanley
    • Department of the Mississippi: Napoleon Jackson Tecumseh Dana
      • District of Vicksburg: Cadwallader Colden Washburn
      • District of Natchez: John Wynn Davidson
    • Department of Kentucky: John McAuley Palmer awaited
      • District of Western Kentucky: Solomon Meredith
    • Department of North Carolina: John McAllister Schofield
      • District of North Carolina: Innis Newton Palmer
        • Sub-District of Beaufort NC: James Stewart
      • Army of the James: Edward Otho Cresap Ord
        • XXIV Corps James: John Gibbon
        • XXV Corps James: Godfrey Weitzel
    • XXIII Corps Ohio: John McAllister Schofield
    • Terry’s Provisional Corps North Carolina: Alfred Howe Terry
    • Army of the Tennessee: Oliver Otis Howard
      • XV Corps Tennessee: John Alexander Logan
      • Detachment Army of the Tennessee (XVI Corps) Andrew Jackson Smith
      • XVII Corps Tennessee: Francis Preston Blair
    • Army of Georgia: Henry Warner Slocum
        • XIV Corps Georgia: Jefferson Columbus Davis
        • XX Corps Georgia: Alpheus Starkey Williams
    • Cavalry Corps Mississippi: James Harrison Wilson
  • Northern Department: Joseph Hooker
    • District of Illinois: John Cook
    • District of Indiana: Alvin Peterson Hovey
    • District of Michigan: Bennett Hoskin Hill

(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)

Union High Command January 12 1864 Western Theatre

  • Military Division of the Mississippi: Ulysses Simpson Grant
    • Department of the Cumberland: George Henry Thomas
      • District of Nashville: Lovell Harrison Rousseau
      • Army of the Cumberland: George Henry Thomas
        • IV Corps Cumberland: Gordon Granger
        • XIV Corps Cumberland: John McAuley Palmer
        • Cavalry Corps Cumberland: Washington Lafayette Elliott
        • Hooker’s Command Cumberland: Joseph Hooker
          • XI Corps Cumberland: Oliver Otis Howard
          • XII Corps Cumberland: Henry Warner Slocum
    • Department of the Ohio: John Gray Foster
      • District of Kentucky: Jacob Ammen
      • District of Middle Tennessee: Jacob Ammen
      • District of Western Kentucky: Jeremiah Tilford Boyle
      • District of the Clinch: Orlando Bolivar Willcox
      • Army of the Ohio: John Gray Foster
        • IX Corps Ohio: Ambrose Everett Burnside
        • XXIII Corps Ohio: Jacob Dolson Cox
        • Cavalry Corps Ohio: Samuel Davis Sturgis
    • Department of the Tennessee: William Tecumseh Sherman
      • District of West Tennessee: Stephen Augustus Hurlbut
        • Sub-District of Memphis: James Clifford Veatch
      • District of Northeast Louisiana: John Parker Hawkins
      • Army of the Tennessee: William Tecumseh Sherman
        • XV Corps Tennessee: John Alexander Logan
        • XVI Corps Tennessee: Napoleon Jackson Tecumseh Dana
          • Left Wing XVI Corps Tennessee: Grenville Mellen Dodge
        • XVII Corps Tennessee: James Birdseye McPherson
  • Northern Department: Samuel Peter Heintzelman awaited
    • District of Indiana: John Smith Simonson

(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.


Union High Command on June 27 1865 Western Theatre

  • Military Division of the Mississippi: William Tecumseh Sherman
    • Army of the Cumberland: George Henry Thomas
    • Department of the Ohio: Edward Otho Cresap Ord awaited
    • Department of the Missouri: Grenville Mellen Dodge interim John Pope awaited
      • District of Minnesota: Henry Hastings Sibley
      • District of St Louis: James Alexander Williamson
      • District of Southwest Missouri: Thomas Jefferson McKean
      • District of North Missouri: George Spalding
      • District of Central Missouri: John Lourie Beveridge
      • District of Rolla: John Morrill
      • District of the Upper Arkansas: James Hobart Ford
    • Department of Arkansas: Joseph Jones Reynolds
      • Army of Arkansas: Joseph Jones Reynolds
        • VII Corps Arkansas: Joseph Jones Reynolds
    • Army of the Tennessee: John Alexander Logan
        • XV Corps Tennessee: William Babcock Hazen
        • XVII Corps Tennessee: Mortimer Dormer Leggett temporary
    • XIV Corps Mississippi: Jefferson Columbus Davis
  • Military Division of the Tennessee: George Henry Thomas
    • Department of Tennessee: George Stoneman awaited
    • Department of Kentucky: John McAuley Palmer
    • Department of Georgia: James Blair Steedman awaited
    • Department of Alabama: Charles Robert Woods awaited
      • District of Northern Alabama: Robert Seaman Granger
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