Union Military Organisations: Western Theatre
This theatre broadly covers the states of Illinois, Indiana, Ohio, Kentucky, Tennessee, Mississippi and adjacent operational regions in Alabama, Georgia, South Carolina, and North Carolina.
This was the decisive theatre of operations where the foundations of Union victory were established. Being geographically central, operations in this theatre inevitably impinged on and overlapped with all the other theatres of war. The military organisation therefore experienced a complex evolution as attention was frequently diverted to diverging and tangential operations. Nevertheless, the main focus remained on two main lines of advance by the Union Army, both assisted by naval forces on the inland rivers. The first followed the line of the Mississippi southwards and the second, followed the line of the Tennessee River into northern Georgia during 1862 to 1864. Exploitation of the latter advance in late 1864 and 1865 took dominant Union forces from the western theatre across Georgia to the Atlantic Coast and then north through the Carolinas.
The first attempt to bring these extensive operations under a unified command was comparatively short-lived. The Department 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.
Index
Military Division of the Mississippi
Military Division of the Tennesse
Department of Alabama
Department of the Cumberland #1
Department of the Cumberland #2
Department of Kentucky #1
Department of Kentucky #2
Department of Mississippi
Department of the Mississippi #1
Department of the Mississippi #2
Northern Department
Department of the Ohio #1
Department of the Ohio #2
Department of the Ohio #3
Department of Tennessee
Department of the Tennessee
District of Northern Alabama
District of Cairo, Illinois #1
District of Cairo, Illinois #2
District of Cairo, Illinois #3
District of the Clinch, Tennessee
District of Columbus
District of Corinth, Mississippi
District of Illinois #1
District of Illinois #2
District of Indiana #1
District of Indiana #2
District of Indiana #3
District of Indiana and Michigan
District of Jackson, Tennessee
District of Kentucky
District of Central Kentucky
District of Eastern Kentucky
District of Western Kentucky #1
District of Western Kentucky #2
District of Western Kentucky #3
District of Louisville, Kentucky
District of Memphis, Tennessee
District of Michigan
District of Mississippi
Northern District of Mississippi
Southern District of Mississippi
Western District of Mississippi
District of Nashville, Tennessee
District of Natchez, Mississippi
District of Ohio
District of the Ohio
District of Tennessee
District of East Tennessee
District of Middle Tennessee #1
District of Middle Tennessee #2
District of West Tennessee #1
District of West Tennessee #2
District of Vicksburg, Mississippi
Sub-District of Columbus, Tennessee
Sub-District of Jackson, Tennessee
Sub-District of North Central Kentucky
Sub-District of South Central Kentucky
Sub-District of Eastern Kentucky
Sub-District of Memphis, Tennessee
Sub-District of Somerset, Kentucky
Army of the Cumberland
Army of Georgia
Army of Kentucky #1
Army of Kentucky #2
Army of the Mississippi #1
Army of the Mississippi #2
Army of the Ohio #1
Army of the Ohio #2
Army of the Tennessee
Army of West Tennessee
Hooker’s Command Cumberland
I Corps Cumberland
I Corps Mississippi
I Corps Ohio
II Corps Cumberland
II Corps Mississippi
II Corps Ohio
III Corps Cumberland
III Corps Ohio
IV Corps Cumberland
IX Corps Ohio #1
IX Corps Ohio #2
IX Corps Tennessee
XI Corps Cumberland (Hooker’s Command)
XII Corps Cumberland (Hooker’s Command
XIII Corps Tennessee #1
XIII Corps Tennessee #2
Centre XIII Corps Tennessee
Left Wing XIII Corps Tennessee
Right Wing XIII Corps Tennessee
XIV Corps Cumberland
XIV Corps Georgia
XIV Corps Mississippi
Centre XIV Corps Cumberland
Left Wing XIV Corps Cumberland
Right Wing XIV Corps Cumberland
XV Corps Tennessee #1
XV Corps Tennessee #2
XVI Corps Tennessee
Detachment Army of the Tennessee (XVI Corps)
Left Wing XVI Corps Tennessee
Right Wing XVI Corps Tennessee
XVII Corps Tennessee
XX Corps Cumberland #1
XX Corps Cumberland #2
XX Corps Georgia
XXI Corps Cumberland
XXIII Corps Ohio
Cavalry Corps Cumberland
Cavalry Corps Mississippi
Cavalry Corps Ohio
Reserve Corps Cumberland
Military Division of the Mississippi
16 October 1863-31 December 1865
Ulysses Simpson Grant 16 October 1863-18 March 1864
William Tecumseh Sherman 18 March 1864-31 December 1865
16 October 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.
16 October 1863: Major-General Ulysses Simpson Grant was appointed to command the Military Division of the Mississippi, arriving on 18 October 1863.
16 October 1863: The Department of the Tennessee was subordinated to the Military Division of the Mississippi.
16 October 1863: The Department of the Cumberland was subordinated to the Military Division of the Mississippi.
16 October 1863: The Department of the Ohio was subordinated to the Military Division of the Mississippi.
18 October 1863: Major-General Ulysses Simpson Grant arrived to command the Military Division of the Mississippi.
18 March 1864: Major-General William Tecumseh Sherman assumed command of the Military Division of the Mississippi, succeeding Lieutenant-General Ulysses Simpson Grant.
29 October 1864: Cavalry Corps Military Division of the Mississippi was established in the Military Division of the Mississippi.
7 November 1864: The “Army of Georgia” was established unofficially in the Military Division of the Mississippi.
24 November 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 28 November 1864 when its constituent territorial commands transferred to the Department of the Mississippi.
16 October 1863: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.
28 November 1864: The Department of the Tennessee was discontinued.
17 January 1865: The Department of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland.
31 January 1865: The Department of North Carolina was established and was subordinated to the Military Division of the Mississippi.
28 March 1865: The Army of Georgia was officially established and confirmed.
17 April 1865: Cavalry Corps Military Division of the Mississippi was discontinued.
19 April 1865: The parts of North Carolina not occupied by the armies of the Military Division of the Mississippi transferred from the Department of North Carolina to the Military Division of the James.
17 June 1865: The Army of Georgia was discontinued. XIV Corps Georgia transferred from the Army of Georgia to the Military Division of the Mississippi.
27 June 1865: The Department of North Carolina transferred from the Military Division of the Mississippi to the Military Division of the Atlantic.
27 June 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.
27 June 1865: The Army of the Cumberland was subordinated to the Military Division of the Mississippi.
27 June 1865: The Department of the Cumberland was discontinued.
27 June 1865: The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee.
1 August 1865: The Department of Arkansas was discontinued.
1 August 1865: The Army of the Cumberland was discontinued.
1 August 1865: The Army of the Tennessee was discontinued.
1 August 1865: The Army of Arkansas was discontinued. VII Corps Arkansas was discontinued.
Military Division of the Tennessee
27 June 1865-31 December 1865
George Henry Thomas 27 June 1865-31 December 1865
27 June 1865: The Military Division of the Tennessee was established. It comprised the Department of Tennessee, the Department of Kentucky, the Department of Alabama, and the Department of Georgia.
27 June 1865: Major-General George Henry Thomas assumed command of the Military Division of the Tennessee.
27 June 1865: The Department of Alabama was established.
27 June 1865: The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee.
27 June 1865: The Department of Tennessee was established in the Military Division of the Tennessee.
27 June 1865: The Department of Georgia was established in the Military Division of the Tennessee.
7 October 1865: The Department of Mississippi transferred from the Military Division of the Gulf to the Military Division of the Tennessee.
Department of Alabama
27 June 1865-31 December 1865
Charles Robert Woods 27 June 1865-31 December 1865
27 June 1865: The Department of Alabama was established and subordinated to the Military Division of the Tennessee, comprising the state of Alabama.
27 June 1865: The Department of the Gulf was discontinued, and its territory incorporated into the Department of Louisiana, the Department of Mississippi, the Department of Alabama, the Department of Florida, and the Department of Texas.
27 June 1865: Brigadier-General Charles Robert Woods was appointed to command the Department of Alabama, arriving on 18 July 1865.
27 June 1865: The District of Northern Alabama transferred to the Department of Alabama.
18 July 1865: Brigadier-General Charles Robert Woods arrived to command the Department of Alabama.
Department of the Cumberland #1
15 August 1861-9 November 1861
Robert Anderson 15 August 1861-6 October 1861 interim 8 October 1861
William Tecumseh Sherman 6 October 1861-9 November 1861
15 August 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.
15 August 1861: Brigadier-General Robert Anderson was appointed to command the Department of the Cumberland, arriving on 24 September 1861.
19 September 1861: The territory of Kentucky within 15 miles of Cincinnati transferred from the Department of the Cumberland to the Department of the Ohio.
24 September 1861: Brigadier-General Robert Anderson arrived to command the Department of the Cumberland.
6 October 1861: Brigadier-General William Tecumseh Sherman was appointed to command the Department of the Cumberland, arriving on 8 October 1861.
8 October 1861: Brigadier-General William Tecumseh Sherman arrived to command the Department of the Cumberland, succeeding Brigadier-General Robert Anderson.
9 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 parts of Tennessee west of the Cumberland River transferred from the Department of the Cumberland to the Department of the Ohio.
Department of the Cumberland #2
24 October 1862-27 June 1865
William Starke Rosecrans 24 October 1862-17 October 1863 interim 20 October 1863
George Henry Thomas 17 October 1863-27 June 1865
24 October 1862: The Department of the Cumberland was re-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 military control.
24 October 1862: Major-General William Starke Rosecrans was appointed to command the Department of the Cumberland, arriving on 30 October 1862.
24 October 1862: The Army of the Cumberland was established in the Department of the Cumberland.
30 October 1862: Major-General William Starke Rosecrans arrived to command the Department of the Cumberland.
25 September 1863: Hooker’s Command Cumberland was established in the Department of the Cumberland, comprising XI Corps Cumberland and XII Corps Cumberland.
16 October 1863: The Department of the Cumberland was subordinated to the Military Division of the Mississippi.
16 October 1863: Major-General William Starke Rosecrans retained command of the Department of the Cumberland.
17 October 1863: Major-General George Henry Thomas was appointed to command the Department of the Cumberland, arriving on 20 October 1863.
10 November 1863: The District of Nashville was established in the Department of the Cumberland.
16 November 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.
24 November 1863: Fort Henry and Fort Donelson transferred from the Department of the Tennessee to the Department of the Cumberland.
14 April 1864: Hooker’s Command Cumberland was discontinued, and its force incorporated into the reorganised XX Corps Cumberland.
30 May 1864: The District of Nashville was discontinued, and its territory transferred to the District of Tennessee.
30 May 1864: The District of Tennessee was established in the Department of the Cumberland.
2 June 1864: The District of Northern Alabama was established in the Department of the Cumberland.
15 June 1864: The District of Etowah was established in the Department of the Cumberland.
17 January 1865: The Department of the Ohio was discontinued, and its territory transferred to the Department of the Cumberland.
17 January 1865: The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland.
17 January 1865: The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland.
17 January 1865: The territories of Georgia, Alabama and Mississippi controlled by the Army of the Cumberland transferred from the Department of the Mississippi to the Department of the Cumberland.
10 February 1865: The District of Kentucky was discontinued, and its territory incorporated into the Department of Kentucky.
10 February 1865: The District of West Tennessee transferred from the Department of the Mississippi to the Department of the Cumberland.
28 February 1865: The District of Tennessee was discontinued, and its territory transferred to the District of Middle Tennessee.
28 February 1865: The District of Middle Tennessee was established in the Department of the Cumberland.
17 March 1865: The District of East Tennessee was discontinued.
17 May 1865: The parts of Mississippi and Alabama previously occupied by the Army of the Cumberland and temporarily controlled by the Department of the Cumberland transferred to the Department of the Gulf.
25 May 1865: The District of West Tennessee was discontinued.
20 June 1865: The District of Etowah was discontinued.
27 June 1865: The Army of the Cumberland transferred from the Department of the Cumberland to the Military Division of the Mississippi.
27 June 1865: The District of Northern Alabama transferred from the Department of the Cumberland to the Department of Alabama.
27 June 1865: The District of Middle Tennessee was discontinued.
27 June 1865: The Department of the Cumberland was discontinued.
Department of Kentucky #1
28 May 1861-15 August 1861
Robert Anderson 28 May 1861-15 August 1861
28 May 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.
28 May 1861: Brigadier-General Robert Anderson assumed command of the Department of Kentucky.
15 August 1861: Western Kentucky transferred from the Department of Kentucky to the Western Department.
15 August 1861: The Department of Kentucky was discontinued, and most of its territory transferred to the Department of the Cumberland.
Department of Kentucky #2
10 February 1865-31 December 1865
John McAuley Palmer 10 February 1865-1 May 1865
Edward Henry Hobson 1 May 1865-31 December 1865
10 February 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.
10 February 1865: The territory around Covington transferred from the Northern Department to the Department of Kentucky.
10 February 1865: The District of Western Kentucky was established in the Department of Kentucky.
10 February 1865: Major-General John McAuley Palmer was appointed to command the Department of Kentucky, arriving on 18 February 1865.
18 February 1865: Major-General John McAuley Palmer arrived to take command of the Department of Kentucky.
1 May 1865: Brigadier-General Edward Henry Hobson assumed temporary command of the Department of Kentucky, succeeding Major-General John McAuley Palmer.
21 May 1865: The District of Western Kentucky was discontinued.
27 June 1865: The Department of Kentucky transferred from the Military Division of the Mississippi to the Military Division of the Tennessee.
27 June 1865: Major-General John McAuley Palmer assumed command of the Department of Kentucky, succeeding Brigadier-General Edward Henry Hobson.
Department of Mississippi
27 June 1865-31 December 1865
Henry Warner Slocum 27 June 1865-16 September 1865 interim 18 September 1865
Peter Joseph Osterhaus 16 September 1865-14 November 1865
Thomas John Wood 14 November 1865-31 December 1865
27 June 1865: The Department of Mississippi was established in the Military Division of the Gulf.
27 June 1865: Major-General Henry Warner Slocum was appointed to command the Department of Mississippi, arriving on 14 July 1865.
27 June 1865: The Northern District of Mississippi was established in the Department of Mississippi.
14 July 1865. The Southern District of Mississippi was established in the Department of Mississippi.
14 July 1865. The Western District of Mississippi was established in the Department of Mississippi.
14 July 1865: Major-General Henry Warner Slocum arrived to command the Department of Mississippi.
16 September 1865: Major-General Peter Joseph Osterhaus was appointed to command the Department of Mississippi, arriving on September 18 1865.
18 September 1865: Major-General Peter Joseph Osterhaus arrived to command the Department of Mississippi, succeeding Major-General Henry Warner Slocum.
7 October 1865: The Department of Mississippi transferred from the Military Division of the Gulf to the Military Division of the Tennessee
7 October 1865: Major-General Peter Joseph Osterhaus retained command of the Department of Mississippi.
14 November 1865: Major-General Thomas John Wood assumed command of the Department of Mississippi, succeeding Major-General Peter Joseph Osterhaus.
Department of the Mississippi #1
11 March 1862-19 September 1862
Henry Wager Halleck 11 March 1862-19 September 1862
Ulysses Simpson Grant interim de facto 11 July 1862-22 July 1862, de facto 22 July 1862-19 September 1862
11 March 1862: The Department of the Mississippi was established from parts of Department of Kansas, Department of the Ohio, and Department of the Mississippi. Headquarters were established at St Louis, Missouri.
11 March 1862: The territory of Kansas, Nebraska Territory, Colorado Territory except Fort Garland in Dakota Territory, and the Indian Territory transferred to the Department of the Mississippi from the Department of Kansas.
11 March 1862: Wisconsin, Missouri, Illinois, western Kentucky, western Tennessee, Arkansas, Minnesota, and Iowa transferred to the Department of the Mississippi from the Department of the Missouri
11 March 1862: Western Michigan, Indiana, and western Ohio transferred to the Department of the Mississippi from the Department of Ohio.
11 March 1862: Major-General Henry Wager Halleck assumed command of the Department of the Mississippi, arriving on 13 March 1862.
13 March 1862: Major-General Henry Wager Halleck arrived to command the Department of the Mississippi.
19 March 1862: The District of Kansas was established in the Department of the Mississippi, comprising the discontinued Department of Kansas.
19 March 1862: The District of the Ohio was established in the Department of the Mississippi.
2 May 1862: The District of Kansas was discontinued.
2 May 1862: The Department of Kansas was re-established and detached from the Department of the Mississippi, comprising Kansas, Dakota Territory, Nebraska Territory, Indian Territory and Colorado Territory except for Fort Garland.
8 June 1862: The territories of Eastern Kentucky and eastern Tennessee transferred from the Mountain Department to the Department of the Mississippi.
26 June 1862: The Army of the Mississippi transferred from the Department of the Mississippi to the District of the West Tennessee.
1 July 1862: The District of Corinth was established in the Department of the Mississippi.
11 July 1862: Major-General Henry Wager Halleck was appointed General-in-Chief of the United States Army, arriving on 23 July 1862. He retained nominal command of the Department of the Mississippi.
11 July 1862: Major-General Ulysses Simpson Grant assumed de facto command of the Department of the Mississippi, pending the departure of Major-General Henry Wager Halleck.
16 July 1862: The District of the Ohio transferred from the Department of the Mississippi to report directly to the War Department.
19 August 1862: The District of Cairo was discontinued.
6 September 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 transferred from the Department of the Mississippi to the Department of the Northwest.
19 September 1862: The Department of the Missouri transferred from the Department of the Mississippi to the War Department.
19 September 1862: The Army of West Tennessee transferred from the Department of the Mississippi to the District of West Tennessee.
19 September 1862: The Army of the Mississippi transferred from the Department of the Mississippi to the Department of the Missouri.
19 September 1862: The Department of the Mississippi was discontinued.
Department of the Mississippi #2
28 November 1864-5 June 1865
Napoleon Jackson Tecumseh Dana 28 November 1864-30 April 1865 interim to 13 May 1865
Gouverneur Kemble Warren 1 May 1865-5 June 1865
28 November 1864: The Department of the Mississippi was established in the Military Division of West 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.
28 November 1864: The District of Vicksburg transferred from the Department of the Tennessee to the Department of the Mississippi.
28 November 1864: The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi.
28 November 1864: Brigadier-General Napoleon Jackson Tecumseh Dana was appointed to command the Department of the Mississippi, arriving on 8 December 1864.
8 December 1864: Brigadier-General Napoleon Jackson Tecumseh Dana arrived to command the Department of the Mississippi.
3 January 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 32 parallel.
17 January 1865: The territories of Georgia, Alabama and Mississippi controlled by the Army of the Cumberland transferred from the Department of the Mississippi to the Department of the Cumberland.
10 February 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.
1 May 1865: Major-General Gouverneur Kemble Warren was appointed to command the Department of the Mississippi, arriving on 14 May 1865.
14 May 1865: Major-General Gouverneur Kemble Warren arrived to command the Department of the Mississippi, succeeding Major-General Napoleon Jackson Tecumseh Dana.
17 May 1865: The District of Mississippi was established in the Department of Gulf, comprising the state of Mississippi transferred from the Department of the Mississippi.
3 June 1865: The District of Natchez was discontinued.
5 June 1865: The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf.
5 June 1865: The Department of the Mississippi was discontinued.
Northern Department
12 January 1864-27 June 1865
Samuel Peter Heintzelman 12 January 1864-28 September 1864 interim 1 October 1864
Joseph Hooker 28 September 1864-27 June 1865
12 January 1864: The Northern Department or Department of the North was established, comprising the states of Michigan, Ohio, Indiana, and Illinois. Headquarters were at Columbus, Ohio.
12 January 1864: The counties of Hancock, Brooke and Ohio in West Virginia transferred from the Department of West Virginia to the Northern Department.
12 January 1864: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.
12 January 1864: The states of Ohio, Michigan, Indiana, and Illinois transferred from the Department of the Ohio to the Northern Department.
12 January 1864: The District of Indiana was established in the Northern Department.
12 January 1864: Major-General Samuel Peter Heintzelman was appointed to command the Northern Department, arriving on 20 January 1864.
20 January 1864: Major-General Samuel Peter Heintzelman arrived to command the Northern Department.
25 January 1864: Cairo, Illinois, transferred from the Northern Department to the District of Cairo in the Department of the Tennessee.
8 February 1864: Jeffersonville, Indiana, transferred from the Northern Department to the Department of the Ohio.
15 February 1864: Alton, Illinois, transferred back from the Northern Department to the Department of the Missouri.
25 June 1864: Covington, Kentucky, and the territory surrounding within ten miles transferred from the Department of the Ohio to the Northern Department.
13 August 1864: The District of Illinois was established in the Northern Department, comprising the state of Illinois.
28 September 1864: Major-General Joseph Hooker was appointed to command the Northern Department, arriving on 1 October 1864, to succeed Major-General Samuel Peter Heintzelman.
1 October 1864: Major-General Joseph Hooker arrived to command the Northern Department, succeeding Major-General Samuel Peter Heintzelman.
1 October 1864: The District of Michigan was established in the Northern Department.
24 November 1864: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.
10 February 1865: The territory around Covington transferred from the Northern Department to the Department of Kentucky.
10 February 1865: The territory around Jeffersonville, Indiana, transferred from the Department of the Cumberland to the Northern Department.
27 June 1865: The District of Illinois was discontinued.
27 June 1865: The District of Indiana was discontinued.
27 June 1865: The District of Michigan was discontinued.
27 June 1865: The Northern Department was discontinued, and its territory incorporated into the Department of the Ohio.
Department of the Ohio #1
3 May 1861-11 March 1862
George Brinton McClellan 3 May 1861-22 July 1861
William Starke Rosecrans 23 July 1861-20 September 1861
Ormsby McKnight Mitchel 21 September 1861-9 November 1861 interim 14 November 1861
Don Carlos Buell 10 November 1861-11 March 1862
3 May 1861: The Department of the Ohio was established, comprising Illinois, Ohio, and Indiana transferred from the Department of the East.
3 May 1861: Ohio State Major-General George Brinton McClellan was appointed to command the Department of the Ohio, arriving on 13 May 1861.
8 May 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 transferred from the Department of the East to the Department of the Ohio.
9 May 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.
13 May 1861: Ohio State Major-General George Brinton McClellan arrived to command the Department of the Ohio.
6 June 1861: The state of Missouri transferred temporarily from the Department of the West to the Department of the Ohio.
14 June 1861: The Army of Occupation was established in western Virginia in the Department of the Ohio.
5 July 1861: The states of Missouri and Illinois transferred from the Department of the Ohio to the Western Department.
23 July 1861: Brigadier-General William Starke Rosecrans assumed command of the Department of the Ohio, succeeding Major-General George Brinton McClellan.
24 July 1861: The Cheat Mountain District was established in the Department of the Ohio, comprising the vicinity of Cheat Mountain, Virginia.
25 July 1861: All the parts of Pennsylvania in the Department of the Ohio transferred to the Department of Pennsylvania.
25 July 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.
3 August 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.
4 September 1861: The Cheat River District was discontinued.
19 September 1861: The Department of the Ohio was reorganised to include Ohio, Indiana, and the territory of Kentucky within 15 miles of Cincinnati, Ohio.
19 September 1861: The territory of Kentucky within 15 miles of Cincinnati transferred from the Department of the Cumberland to the Department of the Ohio.
19 September 1861: The states of Ohio and Indiana transferred to the Department of the Ohio.
19 September 1861: The territory of Kentucky within 15 miles of Cincinnati transferred from the Department of the Cumberland to the Department of the Ohio.
19 September 1861: Brigadier-General Ormsby McKnight Mitchel was appointed to command the Department of the Ohio, arriving on 21 September 1861, to succeed Major-General William Starke Rosecrans.
19 September 1861: 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.
19 September 1861: The Army of Occupation Ohio was discontinued.
19 September 1861: The Cheat Mountain District was discontinued.
21 September 1861: Brigadier-General Ormsby McKnight Mitchel assumed command of the Department of the Ohio, succeeding Major-General William Starke Rosecrans.
9 November 1861: The Army of the Ohio was established in the Department of the Ohio.
15 November 1861: Brigadier-General Don Carlos Buell arrived to command the Department of the Ohio.
20 December 1861: The District of Grafton was discontinued, and its territory transferred to the Railroad District in the Department of Western Virginia.
6 February 1862: The region of Western Tennessee transferred from the Department of the Ohio to the Department of the Missouri.
11 March 1862: The Army of the Ohio transferred from the Department of the Ohio to the Department of the Mississippi
11 March 1862: The Department of the Ohio was discontinued.
Department of the Ohio #2
19 August 1862-17 January 1865
Horatio Gouverneur Wright 19 August 1862-25 March 1863
Ambrose Everett Burnside 25 March 1863-9 December 1863
John Gray Foster 9 December 1863-26 January 1864 interim 9 February 1864
John McAllister Schofield 26 January 1864-8 November 1864 interim 17 November 1864
George Stoneman temporary 17 November 1864-17 January 1865
19 August 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 of the Mississippi, the Department of the Potomac, and the Mountain Department.
19 August 1862: Major-General Horatio Gouverneur Wright was appointed to command the Department of the Ohio, arriving on 23 August 1862.
19 August 1862: The Army of the Ohio transferred from the Department of the Mississippi to the Department of the Ohio.
23 August 1862: Major-General Horatio Gouverneur Wright arrived to command the Department of the Ohio.
24 August 1862: The District of Louisville was established in the Department of the Ohio, comprising the territory round Louisville, Kentucky.
25 August 1862: The Army of Kentucky was established in the Department of the Ohio.
30 August 1862: The Army of Kentucky was discontinued and incorporated into the Army of the Ohio.
6 September 1862: The state of Wisconsin transferred from the Department of the Ohio to the Department of the Northwest.
19 September 1862: Alton, Illinois, transferred from the Department of the Ohio to the Department of the Missouri.
19 September 1862: Western Virginia transferred from the Department of the Potomac to the Department of the Ohio.
19 September 1862: The Sub-District of the Kanawha was established in the Department of the Ohio.
24 September 1862: The Cheat Mountain District was established in the Department of the Ohio, comprising the vicinity of Cheat Mountain, Virginia.
28 September 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.
16 October 1862: Cairo, Illinois, transferred from the Department of the Ohio to the Department of the Tennessee.
24 October 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.
24 October 1862: The portions of Alabama and Georgia under the control of the Army of the Ohio transferred to the Department of the Cumberland.
24 October 1862: The Army of the Ohio was discontinued, and its forces transferred to the Army of the Cumberland. 24 October 1862: The District of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland.
13 November 1862: The Cheat Mountain District in the Department of the Ohio was discontinued.
17 November 1862: The District of Central Kentucky was established in the Department of the Ohio.
17 November 1862: The District of Eastern Kentucky was established in the Department of the Ohio.
17 November 1862: The District of Louisville was discontinued, and its territory incorporated into the District of Western Kentucky.
17 November 1862: The District of Western Kentucky was established in the Department of the Ohio.
17 November 1862: The Army of Kentucky was established in the Department of the Ohio.
16 March 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.
16 March 1863: The Sub-District of the Kanawha was discontinued.
17 March 1863: IX Corps Virginia transferred from the Department of Virginia to the Department of the Ohio.
23 March 1863: The District of Indiana was established in the Department of the Ohio.
25 March 1863: Brigadier-General Ambrose Everett Burnside assumed command of the Department of the Ohio, succeeding Brigadier-General Horatio Gouverneur Wright.
6 April 1863: The District of Ohio was established in the Department of the Ohio.
7 April 1863: The District of Illinois was established in the Department of the Ohio.
11 April 1863: The Army of the Ohio was established in the Department of the Ohio.
11 April 1863: IX Corps Ohio transferred from the Department of the Ohio to the Army of the Ohio.
22 May 1863: The District of Kentucky was established in the Department of the Ohio.
3 June 1863: Columbiana, Jefferson and Belmont counties, Ohio, transferred from the District of Ohio to the Department of the Monongahela.
3 June 1863: Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.
5 June 1863: The District of Indiana was discontinued, and its territory transferred to the District of Indiana and Michigan.
5 June 1863: The District of Indiana and Michigan was established in the Department of the Ohio
9 June 1863: Columbiana, Jefferson and Belmont counties, Ohio, transferred from the District of Ohio in the Department of the Ohio to the Department of the Monongahela.
9 June 1863: Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.
24 June 1863: The Ohio counties south of Belmont and neighbouring western Virginia transferred from the Department of the Ohio to the Department of West Virginia.
4 July 1863: The District of Central Kentucky was discontinued.
11 September 1863: The District of Indiana and Michigan was discontinued, and its territory transferred to the District of Indiana.
11 September 1863: The District of Indiana was established in the Department of the Ohio.
16 October 1863: The Department of the Ohio was subordinated to the Military Division of the Mississippi.
16 October 1863: Major-General Ambrose Everett Burnside retained command of the Department of the Ohio.
6 November 1863:
16 November 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.
16 November 1863: The District of Illinois was discontinued.
16 November 1863: The District of Indiana was discontinued.
16 November 1863: The District of Ohio was discontinued.
21 November 1863: The District of the Clinch was established in the Department of the Ohio.
9 December 1863: Major-General John Gray Foster assumed command of the Department of the Ohio, succeeding Major-General Ambrose Everett Burnside.
16 December 1863: The District of Middle Tennessee was established in the Department of the Ohio.
12 January 1864: The states of Ohio, Michigan, Indiana, and Illinois transferred from the Department of the Ohio to the Northern Department.
26 January 1864: Major-General John McAllister Schofield was appointed to command the Department of the Ohio, arriving on 9 February 1864.
8 February 1864: Jeffersonville, Indiana, transferred from the Northern Department to the Department of the Ohio.
9 February 1864: Major-General John McAllister Schofield arrived to command the Department of the Ohio, succeeding Major-General John Gray Foster.
14 February 1864: The District of Middle Tennessee was discontinued.
4 April 1864: The District of the Clinch was discontinued.
10 April 1864: The District of East Tennessee was established in the Department of the Ohio.
10 April 1864: The District of Nashville was discontinued, and its territory transferred to the District of Tennessee in the Department of the Cumberland.
25 June 1864: Covington, Kentucky, and the territory surrounding within ten miles transferred from the Department of the Ohio to the Northern Department.
10 August 1864: The portion of Kentucky west of the Tennessee River transferred from the Department of the Tennessee to the Department of the Ohio.
8 November 1864: Major-General George Stoneman was appointed to temporary command of the Department of the Ohio, arriving on 17 November 1864, to succeed Major-General John McAllister Schofield.
17 November 1864: Major-General George Stoneman arrived to temporary command of the Department of the Ohio, succeeding Major-General John McAllister Schofield.
17 January 1865: The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland.
17 January 1865: The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland.
17 January 1865: The Department of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland.
Department of the Ohio #3
27 June 1865-31 December 1865
Edward Otho Cresap Ord 27 June 1865-5 July 1865
Orlando Bolivar Willcox 5 July 1865-31 December 1865
27 June 1865: The Department of the Ohio was re-established in the Military Division of the Mississippi. It comprised Ohio, Michigan, Illinois except for Alton, and Indiana except for Jeffersonville and New Albany.
27 June 1865: The Department of Pennsylvania was discontinued, and its territory transferred to the Middle Department and the Department of the Ohio.
27 June 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.
27 June 1865: Alton, Illinois, transferred from the Department of the Missouri to the Department of the Ohio.
27 June 1865: Major-General Edward Otho Cresap Ord was appointed to command the Department of the Ohio, arriving on 5 July 1865.
5 July 1865: Major-General Edward Otho Cresap Ord arrived to command the Department of the Ohio.
30 October 1865: The state of Wisconsin transferred from the Department of the Missouri to the Department of the Ohio.
26 December 1865: Major-General Orlando Bolivar Willcox assumed temporary command of the Department of the Ohio, succeeding Major-General Edward Otho Cresap Ord.
Department of Tennessee
27 June 1865-31 December 1865
George Stoneman 27 June 1865-31 December 1865
27 June 1865: The Department of Tennessee was established in the Military Division of the Tennessee. It comprised the state of Tennessee.
27 June 1865: The Military Division of the Tennessee was established. It comprised the Department of Tennessee, the Department of Kentucky, the Department of Alabama, and the Department of Georgia.
27 June 1865: Major-General George Stoneman was appointed to command the Department of Tennessee, arriving on 1 July 1865.
1 July 1865: Major-General George Stoneman arrived to command the Department of Tennessee.
Department of the Tennessee
16 October 1862-28 November 1864
Ulysses Simpson Grant 16 October 1862-16 October 1863, interim 16 October 1863-26 October 1863
William Tecumseh Sherman 16 October 1863-11 March 1864 interim 26 March 1864
Joseph Birdseye McPherson 11 March 1864-2 July 1864
John Alexander Logan temporary 2 July 1864-27 July 1864 interim 30 July 1864
Oliver Otis Howard 27 July 1864-28 November 1864
16 October 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.
16 October 1862: Cairo, Illinois, transferred from the Department of the Ohio to the Department of the Tennessee.
16 October 1862: The District of West Tennessee was discontinued, and its territory incorporated into the Department of the Tennessee.
16 October 1862: Major-General Ulysses Simpson Grant was appointed to command the Department of the Tennessee, arriving on 25 October 1862.
16 October 1862: The District of Corinth transferred from the District of West Tennessee to the Department of the Tennessee.
16 October 1862: The District of Jackson was established in the Department of the Tennessee.
16 October 1862: The Army of West Tennessee was discontinued, and incorporated into the Army of the Tennessee.
16 October 1862: The Army of the Tennessee was established in the Department of the Tennessee.
16 October 1862: The Army of the Mississippi transferred from the District of West Tennessee to the Army of the Tennessee.
24 October 1862: The Army of the Mississippi was discontinued, and incorporated into XIII Corps Tennessee.
25 October 1862: Major-General Ulysses Simpson Grant arrived to command the Department of the Tennessee.
26 October 1862: The District of Memphis was established in the Department of the Tennessee.
30 October 1862: The District of Columbus was established in the Department of the Tennessee.
4 January 1863: The “Army of the Mississippi” was established unofficially to operate autonomously in the Department of the Tennessee.
12 January 1863: The unofficial “Army of the Mississippi” was discontinued, and its forces transferred to the Army of the Tennessee.
15 January 1863: The District of West Tennessee was established in the Department of the Tennessee.
15 January 1863: The District of Columbus was discontinued, and its territory incorporated into the District of West Tennessee.
15 January 1863: The District of Corinth was discontinued, and its territory incorporated into the District of West Tennessee.
15 January 1863: The District of Memphis was discontinued, and its territory transferred to the District of West Tennessee.
19 January 1863: Portions of Arkansas transferred temporarily from the Department of the Missouri to the Department of the Tennessee.
14 February 1863: The District of Eastern Arkansas transferred from the Department of the Missouri to the Department of the Tennessee.
11 May 1863: The District of Northeast Louisiana was established in the Department of the Tennessee.
28 May 1863: The District of Jackson was discontinued.
5 June 1863: IX Corps Ohio transferred from the Army of the Ohio to the Department of the Tennessee.
25 August 1863: IX Corps Tennessee transferred from the Department of the Tennessee to the Army of the Ohio.
16 October 1863: The Department of the Tennessee was subordinated to the Military Division of the Mississippi.
16 October 1863: Major-General William Tecumseh Sherman was appointed to command the Department of the Tennessee, arriving on 26 October 1863.
16 October 1863: Major-General William Ulysses Simpson Grant retained interim command of the Department of the Tennessee.
26 October 1863: Major-General William Tecumseh Sherman arrived to command the Department of the Tennessee, succeeding Major-General Ulysses Simpson Grant.
24 November 1863: Fort Henry and Fort Donelson transferred from the Department of the Tennessee to the Department of the Cumberland.
6 January 1864: The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas.
12 January 1864: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.
25 January 1864: Cairo, Illinois, transferred from the Northern Department to the District of Cairo in the Department of the Tennessee.
25 January 1864: The District of Cairo was established in the Department of the Tennessee, comprising the vicinity of Cairo, Illinois.
7 February 1864: The District of Northeast Louisiana was discontinued in the Department of the Tennessee.
11 March 1864: Major-General Joseph Birdseye McPherson was appointed to command the Department of the Tennessee, arriving on 26 March 1864, to succeed Major-General William Tecumseh Sherman.
26 March 1864: Major-General James Birdseye McPherson arrived to command the Department of the Tennessee, succeeding Major-General William Tecumseh Sherman.
20 April 1864: The District of Vicksburg was established in the Department of the Tennessee.
2 July 1864: Major-General John Alexander Logan assumed temporary command of the Department of the Tennessee, succeeding Major-General James Birdseye McPherson.
27 July 1864: Major-General Oliver Otis Howard was appointed to command the Department of the Tennessee, arriving on 30 July 1864, to succeed Major-General John Alexander Logan.
20 July 1864: Major-General Oliver Otis Howard arrived to command the Department of the Tennessee, succeeding Major-General John Alexander Logan.
10 August 1864: The portion of Kentucky west of the Tennessee River transferred from the Department of the Tennessee to the Department of the Ohio.
11 September 1864: The District of Western Kentucky was discontinued.
24 November 1864: The Department of the Tennessee was nominally discontinued, and its territory subordinated to the Military Division of the Mississippi. The Department was effectively discontinued from 28 November 1864 when its constituent territorial commands transferred to a new Department of the Mississippi.
24 November 1864: Cairo, Illinois, transferred from the Department of the Tennessee to the Northern Department.
24 November 1864: Fort Henry and Fort Donelson transferred from the Department of the Tennessee to the Department of the Cumberland.
24 November 1864: The Army of the Tennessee transferred from the Department of the Tennessee to the Military Division of the Mississippi.
28 November 1864: The District of Vicksburg transferred from the Department of the Tennessee to the Department of the Mississippi.
28 November 1864: The District of West Tennessee transferred from the Department of the Tennessee to the Department of the Mississippi.
28 November 1864: The Department of the Tennessee was formally discontinued.
District of Northern Alabama
2 June 1864-27 June 1865
Robert Seamen Granger 2 June 1864-27 June 1865
2 June 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.
2 June 1864: Brigadier-General Robert Seamen Granger assumed command of the District of Northern Alabama.
27 June 1865: The District of Northern Alabama transferred to the Department of Alabama.
27 June 1865: Brigadier-General Robert Seaman Granger retained command of the District of Northern Alabama.
24 August 1865: Command of the District of Northern Alabama became vacant.
10 September 1865: The District of Northern Alabama was discontinued.
District of Cairo, Illinois #1
23 December 1861-11 March 1862
Ulysses Simpson Grant 23 December 1861-14 February 1862
William Tecumseh Sherman 14 February 1862-11 March 1862
23 December 1861: The District of Cairo was established in the Department of the Missouri, comprising the vicinity of Cairo, Illinois.
23 December 1861: Brigadier-General Ulysses Simpson Grant assumed command of the District of Cairo.
14 February 1862: Brigadier-General William Tecumseh Sherman assumed command of the District of Cairo, succeeding Brigadier-General Ulysses Simpson Grant.
11 March 1862: The District of Cairo was discontinued.
District of Cairo, Illinois #2
21 March 1862-19 August 1862
William Kerley Strong 21 March 1862-12 April 1862
James Madison Tuttle 12 April 1862-19 August 1862
21 March 1862: The District of Cairo was established in the Department of the Mississippi, comprising the vicinity of Cairo, Illinois.
21 March 1862: Brigadier-General William Kerley Strong assumed command of the District of Cairo.
1 April 1862: The Sub-District of Columbus was established in the District of Cairo, comprising the vicinity of Columbus, Kentucky.
30 June 1862: The Sub-District of Columbus was discontinued.
12 August 1862: Brigadier-General James Madison Tuttle assumed command of the District of Cairo, succeeding Brigadier-General William Kerley Strong.
19 August 1862: The District of Cairo was discontinued.
District of Cairo, Illinois #3
25 January 1864-1 May 1864
Hugh Thompson Reid 25 January 1864-19 March 1864
Mason Brayman 19 March 1864-29 April 1864
Henry Prince 29 April 1864-1 May 1864
25 January 1864: The District of Cairo was established in the Department of the Tennessee, comprising the vicinity of Cairo, Illinois.
25 January 1864: Cairo, Illinois, transferred from the Northern Department to the District of Cairo in the Department of the Tennessee.
25 January 1864: Brigadier-General Hugh Thompson Reid assumed command of the District of Cairo.
19 March 1864: Brigadier-General Mason Brayman assumed command of the District of Cairo, succeeding Brigadier-General Hugh Thompson Reid.
29 April 1864: Brigadier-General Henry Prince assumed command of the District of Cairo, succeeding Brigadier-General Mason Brayman.
1 May 1864: The District of Cairo was discontinued.
District of the Clinch, Tennessee
21 November 1863-4 April 1864
Orlando Bolivar Willcox 24 November 1863-17 January 1864
Theophilus Toulmin Garrard 17 January 1864-4 April 1864
21 November 1863: The District of the Clinch was established in the Department of the Ohio, comprising comprised the vicinity of Cumberland Gap.
21 November 1863: Brigadier-General Orlando Bolivar Willcox assumed command of the District of the Clinch.
17 January 1864: Brigadier-General Theophilus Toulmin Garrard assumed command of the District of the Clinch, succeeding Brigadier-General Orlando Bolivar Willcox.
4 April 1864: The District of the Clinch was discontinued.
District of Columbus
30 October 1862-15 January 1863
Thomas Alfred Davies 30 October 1862-11 January 1863
Alexander Asboth 11 January 1863-15 January 1863
30 October 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.
30 October 1862: Brigadier-General Thomas Alfred Davies assumed command of the District of Columbus.
11 January 1863: Brigadier-General Alexander Asboth assumed command of the District of Columbus, succeeding Brigadier-General Thomas Alfred Davies.
15 January 1863: The District of Columbus was discontinued, and its territory incorporated into the District of West Tennessee.
District of Corinth, Mississippi
1 July 1862-15 January 1863
William Starke Rosecrans 1 July 1862-20 October 1862
Charles Smith Hamilton 20 October 1862-15 January 1863
1 July 1862: The District of Corinth was established in the Department of the Mississippi, comprising the vicinity of Corinth, Mississippi.
1 July 1862: Major-General William Starke Rosecrans assumed command of the District of Corinth.
19 September 1862: The District of Corinth transferred from the Department of the Mississippi to the District of West Tennessee.
19 September 1862: The District of Corinth transferred from the Department of the Mississippi to the District of West Tennessee. Major-General William Starke Rosecrans retained command of the District of Corinth.
16 October 1862: The District of Corinth transferred from the District of West Tennessee to the Department of Tennessee.
16 October 1862: Major-General William Starke Rosecrans retained command of the District of Corinth.
20 October 1862: Major-General Charles Smith Hamilton assumed command of the District of Corinth, succeeding Major-General William Starke Rosecrans.
15 January 1863: The District of Corinth was discontinued, and its territory incorporated into the District of West Tennessee.
District of Illinois #1
7 April 1863-16 November 1863
Jacob Ammen 7 April 1863-16 November 1863
7 April 1863: The District of Illinois was established in the Department of the Ohio, comprising the state of Illinois.
7 April 1863: Brigadier-General Jacob Ammen assumed command of the District of Illinois.
16 November 1863: The District of Illinois was discontinued.
District of Illinois #2
13 August 1864-27 June 1865
Halbert Eleazer Paine 13 August 1864-10 September 1864
John Cook 10 September 1864-27 June 1865
13 August 1864: The District of Illinois was re-established in the Northern Department, comprising the state of Illinois.
13 August 1864: Brigadier-General Halbert Eleazer Paine assumed command of the District of Illinois.
10 September 1864: Brigadier-General John Cook assumed command of the District of Illinois, succeeding Brigadier-General Halbert Eleazer Paine.
27 June 1865: The District of Illinois was discontinued.
District of Indiana #1
23 March 1863-5 June 1863
Henry Beebe Carrington 23 March 1863-15 April 1863
Milo Smith Hascall 15 April 1863-5 June 1863
23 March 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.
15 April 1863: Brigadier-General Milo Smith Hascall assumed command of the District of Indiana, succeeding Brigadier-General Henry Beebe Carrington.
5 June 1863: The District of Indiana was discontinued and incorporated into the District of Indiana and Michigan.
District of Indiana #2
11 September 1863-16 November 1863
John Smith Simonson 11 September 1863-16 November 1863
11 September 1863: The District of Indiana was established in the Department of the Ohio, comprising the state of Indiana from the discontinued District of Indiana and Michigan.
11 September 1863: Colonel John Smith Simonson assumed command of the District of Indiana.
16 November 1863: The District of Indiana was discontinued.
District of Indiana #3
12 January 1864-27 June 1865
John Smith Simonson 12 January 1864-23 May 1864
Henry Beebe Carrington 23 May 1864-25 August 1864
Alvin Peterson Hovey 25 August 1864-27 June 1865
12 January 1864: The District of Indiana was established in the Northern Department. It comprised the state of Indiana.
12 January 1864: Colonel John Smith Simonson assumed command of the District of Indiana.
23 May 1864: Brigadier-General Henry Beebe Carrington assumed command of the District of Indiana, succeeding Colonel John Smith Simonson.
25 August 1864: Brigadier-General Alvin Peterson Hovey assumed command of the District of Indiana, succeeding Brigadier-General Henry Beebe Carrington.
27 June 1865: The District of Indiana was discontinued.
District of Indiana and Michigan
5 June 1863-11 September 1863
Orlando Bolivar Willcox 5 June 1863-11 September 1863
5 June 1863: The District of Indiana and Michigan was established in the Department of the Ohio, comprising the states of Indiana and Michigan.
5 June 1863: Brigadier-General Orlando Bolivar Willcox assumed command of the District of Indiana and Michigan.
11 September 1863: The District of Indiana and Michigan was discontinued, and its territory transferred to the District of Indiana.
District of Jackson, Tennessee
16 October 1862-28 May 1863
Stephen Augustus Hurlbut 16 October 1862-19 November 1862
Jeremiah Cutler Sullivan 19 November 1862-20 March 1863
Nathan Kimball 20 March 1863-28 May 1863
16 October 1862: The District of Jackson was established in the Department of the Tennessee, to comprise the former Sub-District of Jackson.
16 October 1862: Major-General Stephen Augustus Hurlbut assumed command of the District of Jackson.
19 November 1862: Brigadier-General Jeremiah Cutler Sullivan assumed command of the District of Jackson, succeeding Major-General Stephen Augustus Hurlbut.
20 March 1863: Brigadier-General Nathan Kimball assumed command of the District of Jackson, succeeding Brigadier-General Jeremiah Cutler Sullivan.
28 May 1863: The District of Jackson was discontinued.
District of Kentucky
22 May 1863-10 February 1865
Jeremiah Tilford Boyle 22 May 1863-6 November 1863
Jacob Ammen 1 December 1863-5 February 1864
Stephen Gano Burbridge 5 February 1864-1 April 1864
Edward Henry Hobson 1 April 186410 April 1864
Stephen Gano Burbridge 10 April 1864-10 February 1865
22 May 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.
6 November 1863: The Sub-District of Eastern Kentucky was established in the District of Kentucky.
6 November 1863: The Sub-District of North Central Kentucky was established in the District of Kentucky.
6 November 1863: The District of South Central Kentucky was discontinued, and renamed as the Sub-District of Eastern Kentucky in the District of Kentucky.
6 November 1863: The Sub-District of Somerset was established in the District of Kentucky
1 December 1863: The Sub-District of Eastern Kentucky was discontinued.
1 December 1863: The Sub-District of North Central Kentucky was discontinued.
1 December 1863: The Sub-District of South Central Kentucky was discontinued.
1 December 1863: The Sub-District of Somerset was discontinued.
1 December 1863: Brigadier-General Jacob Ammen assumed command of the District of Kentucky, succeeding Brigadier-General Jeremiah Tilford Boyle.
5 February 1864: Brigadier-General Stephen Gano Burbridge assumed command of the District of Kentucky, succeeding Brigadier-General Jacob Ammen.
1 April 1864: Brigadier-General Edward Henry Hobson assumed command of the District of Kentucky, succeeding Brigadier-General Stephen Gano Burbridge.
10 April 1864: Brigadier-General Stephen Gano Burbridge assumed command of the District of Kentucky, succeeding Brigadier-General Edward Henry Hobson.
17 January 1865: The District of Kentucky transferred from the Department of the Ohio to the Department of the Cumberland.
17 January 1865: Brigadier-General Stephen Gano Burbridge retained command of the District of Kentucky.
10 February 1865: The District of Kentucky was discontinued, and its territory incorporated into the Department of Kentucky.
District of Central Kentucky
17 November 1862-4 July 1863
Gordon Granger 17 November 1862-25 January 1863
Quincy Adams Gillmore 25 January 1863-10 April 1863
Orlando Bolivar Willcox 10 April 1863-4 June 1863
Samuel Davis Sturgis 4 June 1863-4 July 1863
17 November 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.
17 November 1862: Major-General Gordon Granger assumed command of the District of Central Kentucky.
25 January 1863: Brigadier-General Quincy Adams Gillmore assumed command of the District of Central Kentucky, succeeding Major-General Gordon Granger.
10 April 1863: Brigadier-General Orlando Bolivar Willcox assumed command of the District of Central Kentucky, succeeding Brigadier-General Quincy Adams Gillmore.
4 June 1863: Brigadier-General Samuel Davis Sturgis assumed command of the District of Central Kentucky, succeeding Brigadier-General Orlando Bolivar Willcox.
4 July 1863: The District of Central Kentucky was discontinued.
District of Eastern Kentucky
17 November 1862-6 November 1863
Jonathan Cranor 17 November 1862-5 February 1863
Julius White 5 February 1863-6 August 1863
Samuel Powhatan Carter 6 August 1863-15 August 1863
George W Gallup 15 August 1863-6 November 1863
17 November 1862: The District of Eastern Kentucky was established in the Department of the Ohio, comprising the nine easternmost counties in Kentucky.
17 November 1862: Colonel Jonathan Cranor assumed command of the District of Eastern Kentucky.
5 February 1863: Brigadier-General Julius White assumed command of the District of Eastern Kentucky, succeeding Colonel Jonathan Cranor.
6 August 1863: Brigadier-General Samuel Powhatan Carter assumed command of the District of Eastern Kentucky, succeeding Brigadier-General Julius White.
15 August 1863: Colonel George W Gallup assumed command of the District of Eastern Kentucky, succeeding Brigadier-General Samuel Powhatan Carter.
6 November 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 #1
8 September 1861-31 January 1862
Charles Ferguson Smith 8 September 1861-17 November 1861
Horatio Gouverneur Wright 17 November 1861-31 January 1862
8 September 1861: The District of Western Kentucky was established in the Western Department.
8 September 1861: Brigadier-General Charles Ferguson Smith assumed command of the District of Western Kentucky.
9 November 1861: The District of Western Kentucky transferred from the Western Department to the Department of the Missouri.
9 November 1861: Brigadier-General Charles Ferguson Smith retained command of the District of Western Kentucky.
17 November 1861: Brigadier-General Horatio Gouverneur Wright assumed command of the District of Western Kentucky, succeeding Brigadier-General Charles Ferguson Smith.
31 January 1862: The District of Western Kentucky was discontinued.
District of Western Kentucky #2
17 November 1862-11 September 1864
Jeremiah Tilford Boyle 17 November 1862-25 January 1864
Vacant 26 January 1864-25 March 1864
Horatio Gouverneur Wright 25 March 1864-4 April 1864
Eleazar Arthur Paine 4 April 1864-11 September 1864
17 November 1862: The District of Western Kentucky was re-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.
17 November 1862: Brigadier-General Jeremiah Tilford Boyle assumed command of the District of Western Kentucky.
26 January 1864: Command of the District of Western Kentucky became vacant after the resignation of Brigadier-General Jeremiah Tilford Boyle.
25 March 1864: The District of Western Kentucky transferred from the Department of the Ohio to the Department of the Tennessee.
25 March 1864: Brigadier-General Horatio Gouverneur Wright assumed command of the District of Western Kentucky, following a vacancy.
4 April 1864: Brigadier-General Eleazer Arthur Paine assumed command of the District of Western Kentucky, succeeding Brigadier-General Horatio Gouverneur Wright.
11 September 1864: The District of Western Kentucky was discontinued.
District of Western Kentucky #3
10 February 1865-21 May 1865
Solomon Meredith 10 February 1865-21 May 1865
10 February 1865: The District of Western Kentucky was re-established in the Department of Kentucky.
10 February 1865: Brigadier-General Solomon Meredith assumed command of the District of Western Kentucky.
21 May 1865: The District of Western Kentucky was discontinued.
District of Louisville, Kentucky
24 August 1862-17 November 1862
Jeremiah Tilford Boyle 24 August 1862-17 November 1862
24 August 1862: The District of Louisville was established in the Department of the Ohio, comprising the territory round Louisville, Kentucky.
24 August 1862: Brigadier-General Jeremiah Tilford Boyle assumed command of the District of Louisville.
17 November 1862: The District of Louisville was discontinued, and its area incorporated into the District of Western Kentucky.
District of Memphis, Tennessee
26 October 1862-15 January 1863
William Tecumseh Sherman 26 October 1862-25 November 1862
Stephen Augustus Hurlbut 25 November 1862-6 January 1863
James Clifford Veatch 6 January 1863-15 January 1863
26 October 1862: The District of Memphis was established in the Department of the Tennessee, comprising Tennessee south of the Hatchie River and west of Bolivar.
26 October 1862: Major-General William Tecumseh Sherman assumed command of the District of Memphis.
25 November 1862: Major-General Stephen Augustus Hurlbut assumed command of the District of Memphis, succeeding Major-General William Tecumseh Sherman.
6 January 1863: Brigadier-General James Clifford Veatch assumed command of the District of Memphis, succeeding Major-General Stephen Augustus Hurlbut.
15 January 1863: The District of Memphis was discontinued and renamed the Sub-District of Memphis to the District of West Tennessee.
District of Michigan
1 October 1864-27 June 1865
Bennett Hoskin Hill 1 October 1864-27 June 1865
1 October 1864: The District of Michigan was established in the Northern Department. It comprised the state of Michigan.
1 October 1864: Lieutenant-Colonel Bennett Hoskin Hill assumed command of the District of Michigan.
27 June 1865: The District of Michigan was discontinued.
District of Mississippi
17 May 1865-27 June 1865
Peter Joseph Osterhaus 17 May 1865-27 June 1865
Henry Warner Slocum 27 June 1865-16 September 1865 interim 18 September 1865
Peter Joseph Osterhaus 16 September 1865-27 June 1865
17 May 1865: The District of Mississippi was established in the Department of Gulf, comprising the state of Mississippi transferred from the Department of the Mississippi.
17 May 1865: Major-General Peter Joseph Osterhaus assumed command of the District of Mississippi.
27 June 1865: The state of Mississippi transferred from the Department of the Gulf to the Department of Mississippi.
27 June 1865: The District of Mississippi was discontinued, and its territory incorporated into the Department of Mississippi.
Northern District of Mississippi
27 June 1865-31 December 1865
Peter Joseph Osterhaus 27 June 1865-31 December 1865
27 June 1865: The Northern District of Mississippi was established in the Department of Mississippi. It comprised the vicinity of Jackson, and all counties east and north of the city.
27 June 1865: Major-General Peter Joseph Osterhaus assumed command of the Northern District of Mississippi.
Southern District of Mississippi
27 June 1865-31 December 1865
John Wynn Davidson 27 June 1865-31 December 1865
27 June 1865: The Southern District of Mississippi was established in the Department of Mississippi. It comprised all counties south of the northern lines of Claiborne, Copiah, Lawrence, Covington, Jones, and Wayne counties in Mississippi.
27 June 1865: Brigadier-General John Wynn Davidson assumed command of the Southern District of Mississippi.
Western District of Mississippi
27 June 1865-31 December 1865
Joseph Adalmorn Maltby 27 June 1865-31 December 1865
27 June 1865: The Western District of Mississippi was established in the Department of Mississippi. It comprised Bolivar, Sunflower, Washington, Yazoo, Issaquena, and Warren counties.
27 June 1865: Brigadier-General Joseph Adalmorn Maltby assumed command of the Western District of Mississippi.
District of Nashville, Tennessee
10 November 1863-30 May 1864
Lovell Harrison Rousseau 10 November 1863-30 May 1864
10 November 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.
10 November 1863: Major-General Lovell Harrison Rousseau assumed command of the District of Nashville.
30 May 1864: The District of Nashville was discontinued, and its territory incorporated into the District of Tennessee.
District of Natchez, Mississippi
3 January 1865-3 June 1865
John Wynn Davidson 3 January 1865-3 June 1865
3 January 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 32 parallel. It was detached from the District of Vicksburg.
3 January 1865: Brigadier-General John Wynn Davidson assumed command of the District of Natchez.
3 June 1865: The District of Natchez was discontinued.
District of Ohio
6 April 1863-16 November 1863
John Sanford Mason 6 April 1863-14 April 1863
Jacob Dolson Cox 14 April 1863-16 November 1863
6 April 1863: The District of Ohio was established in the Department of the Ohio, comprising the state of Ohio.
6 April 1863: Brigadier-General John Sanford Mason assumed command of the District of Ohio.
14 April 1863: Major-General Jacob Dolson Cox assumed command of the District of Ohio, succeeding Brigadier-General John Sanford Mason.
3 June 1863: Columbiana, Jefferson and Belmont counties, Ohio, transferred from the District of Ohio to the Department of the Monongahela.
3 June 1863: Gallipolis, Ohio, transferred from the Department of the Ohio to the Middle Department.
24 June 1863: The Ohio counties south of Belmont and neighbouring western Virginia transferred from the Department of the Ohio to the Department of West Virginia.
16 November 1863: The District of Ohio was discontinued.
District of the Ohio
19 March 1862-24 October 1862
Don Carlos Buell 19 March 1862-24 October 1862
19 March 1862: The District of the Ohio was established in the Department of the Mississippi, comprising the territory east of the Tennessee River in Kentucky and Tennessee except for Fort Henry and Fort Donelson.
19 March 1862: Brigadier-General Don Carlos Buell assumed command of the District of the Ohio.
16 July 1862: The District of the Ohio transferred from the Department of the Mississippi to the War Department.
16 July 1862: Major-General Don Carlos Buell retained command of the District of the Ohio.
24 October 1862: The District of the Ohio was discontinued, and its territory incorporated into the Department of the Cumberland.
District of Tennessee
30 May 1864-28 February 1865
Lovell Harrison Rousseau 30 May 1864-28 February 1865
30 May 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 the former District of Nashville, Tennessee.
30 May 1864: Major-General Lovell Harrison Rousseau assumed command of the District of Tennessee.
28 February 1865: The District of Tennessee was discontinued, and its territory transferred to the District of Middle Tennessee.
District of East Tennessee
10 April 1864-17 March 1865
Jacob Ammen 10 April 1864-3 January 1865
Vacant 4 January 1865-17 January 1865
Davis Tillson 17 January 1865-9 March 1865
George Stoneman 9 March 1865-17 March 1865
10 April 1864: The District of East Tennessee was established in the Department of the Ohio, comprising the territory around Knoxville, Tennessee.
10 April 1864: Brigadier-General Jacob Ammen assumed command of the District of East Tennessee.
4 January 1865: Command of the District of East Tennessee became vacant.
17 January 1865: The District of East Tennessee transferred from the Department of the Ohio to the Department of the Cumberland.
17 January 1865: Brigadier-General Davis Tillson assumed command of the District of East Tennessee, succeeding Brigadier-General Jacob Ammen.
9 March 1865: Major-General George Stoneman assumed command of the District of East Tennessee, succeeding Brigadier-General Davis Tillson.
17 March 1865: The District of East Tennessee was discontinued.
District of Middle Tennessee #1
16 December 1863-14 February 1864
Jacob Ammen 16 December 1863-14 February 1864
16 December 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.
16 December 1863: Brigadier-General Jacob Ammen assumed command of the District of Middle Tennessee.
14 February 1864: The District of Middle Tennessee was discontinued.
District of Middle Tennessee #2
28 February 1865-27 June 1865
Lovell Harrison Rousseau 28 February 1865-27 June 1865
28 February 1865: The District of Middle Tennessee was re-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.
28 February 1865: Major-General Lovell Harrison Rousseau assumed command of the District of Middle Tennessee.
27 June 1865: The District of Middle Tennessee was discontinued.
District of West Tennessee #1
14 February 1862-16 October 1862
Ulysses Simpson Grant 14 February 1862-11 March 1862
Charles Ferguson Smith 11 March 1862-17 March 1862
Ulysses Simpson Grant 17 March 1862-16 October 1862
14 February 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.
14 February 1862: Brigadier-General Ulysses Simpson Grant was appointed to command the District of West Tennessee, arriving on 17 February 1862.
17 February 1862: Brigadier-General Ulysses Simpson Grant arrived to command the District of West Tennessee.
21 February 1862: The Army of West Tennessee was established in the District of West Tennessee.
11 March 1862: The Army of West Tennessee transferred from the District of West Tennessee to the Department of the Mississippi.
11 March 1862: The District of West Tennessee transferred from the Department of the Missouri to the Department of the Mississippi.
11 March 1862: Brigadier-General Charles Ferguson Smith assumed command of the District of West Tennessee, succeeding Major-General Ulysses Simpson Grant.
17 March 1862: Brigadier-General Ulysses Simpson Grant assumed command of the District of West Tennessee, succeeding Brigadier-General Charles Ferguson Smith.
16 June 1862: The District of the Mississippi was discontinued, and its territory transferred the District of West Tennessee.
21 June 1862: The Sub-District of Jackson was established in the District of West Tennessee.
26 June 1862: The Army of the Mississippi transferred from the Department of the Mississippi to the District of the West Tennessee.
19 September 1862: The District of West Tennessee transferred from the Department of the Mississippi to the War Department. It comprised the territory around Fort Henry and Fort Donelson in Tennessee, southwards to Corinth, Mississippi.
19 September 1862: Major-General Ulysses Simpson Grant retained command of the District of West Tennessee.
16 October 1862: The Army of West Tennessee was discontinued, and incorporated into the Army of the Tennessee. 16 October 1862: The District of Corinth transferred from the District of West Tennessee to the Department of Tennessee. 16 October 1862: The Sub-District of Jackson was discontinued.
16 October 1862: The Army of the Mississippi transferred to the Department of the Tennessee.
16 October 1862: The District of West Tennessee was discontinued, and its territory transferred to the Department of the Tennessee.
District of West Tennessee #2
15 January 1863-25 May 1865
Charles Smith Hamilton 15 January 1863-11 February 1863
Stephen Augustus Hurlbut 11 February 1863-28 April 1864
Cadwallader Colden Washburn 28 April 1864-2 June 1864
Benjamin Henry Grierson 2 June 1864-28 November 1864
Napoleon Jackson Tecumseh Dana 28 November 1864-7 December 1864
James Clifford Veatch 8 December 1864-2 February 1865
Benjamin Stone Roberts 3 February 1865-4 March 1865
Cadwallader Colden Washburn 4 March 1865-25 May 1865
15 January 1863: The District of West Tennessee was re-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.
15 January 1863: Major-General Charles Smith Hamilton assumed command of the District of West Tennessee.
15 January 1863: The Sub-District of Memphis was established in the District of West Tennessee.
11 February 1863: Major-General Stephen Augustus Hurlbut assumed command of the District of West Tennessee, succeeding Major-General Charles Smith Hamilton.
28 April 1864: Major-General Cadwallader Colden Washburn assumed command of the District of West Tennessee, succeeding Major-General Stephen Augustus Hurlbut.
2 June 1864: Brigadier-General Benjamin Henry Grierson assumed command of the District of West Tennessee, succeeding Brigadier-General Cadwallader Colden Washburn.
28 November 1864: The Sub-District of Memphis was discontinued.
28 November 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.
28 November 1864: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of the District of West Tennessee, succeeding Brigadier-General Benjamin Henry Grierson.
8 December 1864: Brigadier-General James Clifford Veatch assumed command of the District of West Tennessee, succeeding Brigadier-General Napoleon Jackson Tecumseh Dana.
3 February 1865: Brigadier-General Benjamin Stone Roberts arrived to command the District of West Tennessee, succeeding Brigadier-General John Clifford Veatch.
10 February 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.
10 February 1865: Brigadier-General Benjamin Stone Roberts retained command of the District of West Tennessee.
4 March 1865: Major-General Cadwallader Colden Washburn assumed command of the District of West Tennessee, succeeding Brigadier-General Benjamin Stone Roberts.
25 May 1865: The District of West Tennessee was discontinued.
District of Vicksburg, Mississippi
20 April 1864-22 June 1865
Henry Warner Slocum 20 April 1864-19 August 1864
Napoleon Jackson Tecumseh Dana 19 August 1864-27 September 1864
Morgan Lewis Smith 27 September 1864-28 November 1864
Napoleon Jackson Tecumseh Dana 28 November 1864-7 December 1864
Cadwallader Colden Washburn 8 December 1864-10 February 1865
Morgan Lewis Smith 11 February 1865-22 June 1865
20 April 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.
20 April 1864: Major-General Henry Warner Slocum assumed command of the District of Vicksburg.
19 August 1864: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of the District of Vicksburg, succeeding Major-General Henry Warner Slocum.
27 September 1864: Major-General Morgan Lewis Smith assumed command of the District of Vicksburg, succeeding Major-General Napoleon Jackson Tecumseh Dana.
28 November 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.
28 November 1864: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of the District of Vicksburg, succeeding Brigadier-General Morgan Lewis Smith.
8 December 1864: Major-General Cadwallader Colden Washburn assumed command of the District of Vicksburg, succeeding Brigadier-General Napoleon Jackson Tecumseh Dana.
3 January 1865: The territories east and west of the Mississippi River north of the Red River and south of the 32 parallel were detached from the District of Vicksburg and assigned to the District of Natchez.
11 February 1865: Brigadier-General Morgan Lewis Smith assumed command of the District of Vicksburg, succeeding Brigadier-General Cadwallader Colden Washburn.
5 June 1865: The District of Vicksburg transferred from the Department of the Mississippi to the Department of the Gulf
5 June 1865: Major-General Morgan Lewis Smith retained command of the District of Vicksburg.
22 June 1865: The District of Vicksburg was discontinued.
Sub-District of Columbus, Tennessee
1 April 1862-30 June 1862
Isaac Ferdinand Quinby 1 April 1862-30 June 1862
1 April 1862: The Sub-District of Columbus was established in the District of Cairo, comprising the vicinity of Columbus, Kentucky.
1 April 1862: Brigadier-General Isaac Ferdinand Quinby assumed command of the Sub-District of Columbus.
30 June 1862: The Sub-District of Columbus was discontinued.
Sub-District of Jackson, Tennessee
21 June 1862-16 October 1862
John Alexander McClernand 21 June 1862-25 August 1862
John Alexander Logan 25 August 1862–24 September 1862
Edward Otho Cresap Ord 24 September 1862-5 October 1862
Stephen Augustus Hurlbut 5 October 1862-16 October 1862
21 June 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.
21 June 1862: Major-General John Alexander McClernand assumed command of the Sub-District of Jackson.
25 August 1862: Brigadier-General John Alexander Logan assumed command of the Sub-District of Jackson, succeeding Major-General John Alexander McClernand.
19 September 1862: The Sub-District of Jackson transferred with the District of West Tennessee to the War Department.
24 September 1862: Major-General Edward Otho Cresap Ord assumed command of the Sub-District of Jackson, succeeding Brigadier-General John Alexander Logan.
5 October 1862: Major-General Stephen Augustus Hurlbut assumed command of the Sub-District of Jackson, succeeding Major-General Edward Otho Cresap Ord.
16 October 1862: The Sub-District of Jackson was discontinued and renamed the District of Jackson.
Sub-District of North Central Kentucky
6 November 1863-1 December 1863
Speed Smith Fry 6 November 1863-1 December 1863
6 November 1863: The Sub-District of North Central Kentucky was established in the District of Kentucky, comprising the territory around Camp Nelson, Kentucky.
6 November 1863: Brigadier-General Speed Smith Fry assumed command of the Sub-District of North Central Kentucky.
1 December 1863: The Sub-District of North Central Kentucky was discontinued.
Sub-District of South Central Kentucky
6 November 1863-1 December 1863
Edward Henry Hobson 6 November 1863-1 December 1863
6 November 1863: The Sub-District of Southern Central Kentucky was established in the District of Kentucky, comprising the vicinity of Munfordville, Kentucky.
6 November 1863: Brigadier-General Edward Henry Hobson assumed command of the Sub-District of Southern Central Kentucky.
1 December 1863: The Sub-District of South Central Kentucky was discontinued.
Sub-District of Eastern Kentucky
6 November 1863-1 December 1863
George W Gallup 6 November 1863-1 December 1863
6 November 1863: The Sub-District of Eastern Kentucky was established in the District of Kentucky, comprising the renamed District of Eastern Kentucky.
6 November 1863: Colonel George W Gallup retained command of the Sub-District of Eastern Kentucky.
1 December 1863: Sub-District of Eastern Kentucky was discontinued.
Sub-District of Memphis, Tennessee
15 January 1863-28 November 1864
James Clifford Veatch 15 January 1863-25 January 1864
Ralph Pomeroy Buckland 25 January 1864-28 November 1864
15 January 1863: The Sub-District of Memphis established in the District of West Tennessee, comprising the former District of Memphis.
15 January 1863: Brigadier-General James Clifford Veatch retained command of the District of Memphis.
25 January 1864: Brigadier-General Ralph Pomeroy Buckland assumed command of the Sub-District of Memphis, succeeding Brigadier-General James Clifford Veatch.
28 November 1864: The Sub-District of Memphis was discontinued.
Sub-District of Somerset, Kentucky
6 November 1863-1 December 1863
Theophilus Toulmin Garrard 6 November 1863-1 December 1863
6 November 1863: The Sub-District of Somerset was established in the District of Kentucky, comprising the vicinity of Somerset, Kentucky.
6 November 1863: Brigadier-General Theophilus Toulmin Garrard assumed command of the Sub-District of Somerset.
1 December 1863: The Sub-District of Somerset was discontinued.
Army of the Cumberland
24 October 1862-1 August 1865
William Starke Rosecrans 24 October 1862-19 October 1863
George Henry Thomas 19 October 1863-1 August 1865
24 October 1862: The Army of the Cumberland was established in the Department of the Cumberland.
24 October 1862: Major-General William Starke Rosecrans assumed command of the Army of the Cumberland.
24 October 1862: XIV Corps Cumberland was established in the Army of the Cumberland, incorporating the former Army of the Ohio.
24 October 1862: I Corps Cumberland was established in the Army of the Cumberland.
24 October 1862: II Corps Cumberland was established in the Army of the Cumberland.
24 October 1862: III Corps Cumberland was established in the Army of the Cumberland.
24 October 1862: Cavalry Corps Cumberland was established in the Army of the Cumberland.
5 November 1862: I Corps Cumberland was discontinued, and renamed Right Wing XIV Corps Cumberland.
5 November 1862: II Corps Cumberland was discontinued, and renamed Left Wing XIV Corps Cumberland.
5 November 1862: III Corps Cumberland was discontinued, and renamed Centre XIV Corps Cumberland.
9 January 1863: Centre XIV Corps Cumberland was discontinued, and renamed XIV Corps Cumberland.
9 January 1863: Right Wing XIV Corps Cumberland was discontinued, and renamed XX Corps Cumberland.
9 January 1863: XX Corps Cumberland was established in the Army of the Cumberland, comprising the former Right Wing XIV Corps Cumberland.
9 January 1863: Left Wing XIV Corps Cumberland was discontinued, and renamed XXI Corps Cumberland.
9 January 1863: XXI Corps Cumberland was established in the Army of the Cumberland, comprising forces from Left Wing XIV Corps Cumberland.
8 June 1863: The “Army of Kentucky”, operating unofficially in the Army of the Cumberland since 20 January 1863, was discontinued.
8 June 1863: Reserve Corps Cumberland was established in the Department of the Cumberland, incorporating the former Army of Kentucky.
25 September 1863: Hooker’s Command Cumberland established in the Department of the Cumberland.
25 September 1863: XI Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.
25 September 1863: XII Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.
28 September 1863: IV Corps Cumberland was established in the Army of the Cumberland.
9 October 1863: XX Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
9 October 1863: XXI Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
9 October 1863: Reserve Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
19 October 1863: Major-General George Henry Thomas assumed command of the Army of the Cumberland, succeeding Major-General William Starke Rosecrans.
14 April 1864: Hooker’s Command Cumberland was discontinued, and its force incorporated into XX Corps Cumberland.
14 April 1864: XI Corps Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
14 April 1864: XII Corps Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
14 April 1864: XX Corps Cumberland was established in the Army of the Cumberland.
29 October 1864: Cavalry Corps Cumberland was discontinued.
7 November 1864: XX Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
7 November 1864: 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 transferred from the Department of the Mississippi to the Department of the Cumberland.
1 April 1865: IV Corps Cumberland was discontinued.
17 May 1865: The parts of Mississippi and Alabama previously occupied by the Army of the Cumberland and temporarily controlled by the Department of the Cumberland transferred to the Department of the Gulf.
27 June 1865: The Army of the Cumberland transferred to the Military Division of the Mississippi.
27 June 1865: Major-General George Henry Thomas retained command of the Army of the Cumberland.
1 August 1865: The Army of the Cumberland was discontinued.
Army of Georgia
7 November 1864-17 June 1865
Henry Warner Slocum 7 November 1864-17 June 1865
7 November 1864: The “Army of Georgia” was established unofficially in the Military Division of the Mississippi, comprising XIV Corps Cumberland and XX Corps Cumberland.
7 November 1864: Major-General Henry Warner Slocum assumed command of the “Army of Georgia.”
7 November 1864: XX Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
7 November 1864: XIV Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
28 March 1865: The Army of Georgia was officially confirmed, comprising XIV Corps Georgia and XX Corps Georgia.
28 March 1865: Major-General Henry Warner Slocum retained command of the Army of Georgia.
28 March 1865: XIV Corps Cumberland was assigned officially to the Army of Georgia.
28 March 1865: XX Corps Cumberland was assigned officially to the Army of Georgia.
1 June 1865: XX Corps Georgia was discontinued.
17 June 1865: XIV Corps Georgia transferred from the Army of Georgia to the Military Division of the Mississippi.
17 June 1865: The Army of Georgia was discontinued.
Army of Kentucky #1
25 August 1862-30 August 1862
William Nelson 25 August 1862-30 August 1862
25 August 1862: The Army of Kentucky was established in the Department of the Ohio from field forces of the former Department of Kentucky.
25 August 1862: Brigadier-General William Nelson assumed command of the Army of Kentucky.
30 August 1862: The Army of Kentucky was discontinued, and integrated into the Army of the Ohio, retaining the unofficial name “Army of Kentucky”.
Army of Kentucky #2
17 November 1862-20 January 1863
Gordon Granger 17 November 1862-20 January 1863
17 November 1862: The Army of Kentucky was established in the Department of the Ohio.
17 November 1862: Major-General Gordon Granger assumed command of the Army of Kentucky.
20 January 1863: The Army of Kentucky was discontinued. The term was used unofficially until 8 June 1863, when these forces were renamed Reserve Corps Cumberland.
Army of the Mississippi #1
23 February 1862-24 October 1862
John Pope 23 February 1862-26 June 1862
William Starke Rosecrans 26 June 1862-24 October 1862
23 February 1862: The Army of the Mississippi was officially announced for the proposed Department of the Mississippi, which would be formally established on March 1 1862. It comprised the forces of the former Army of Western Missouri.
23 February 1862: Brigadier-General John Pope assumed command of the Army of the Mississippi.
27 February 1862: The Army of the Mississippi transferred to the District of the Mississippi.
27 February 1862: Brigadier-General John Pope retained command of the Army of the Mississippi.
11 March 1862: The Army of the Mississippi transferred from the District of the Mississippi to the Department of the Mississippi.
23 February 1862: The Army of the Mississippi was officially announced for the proposed Department of the Mississippi, which would be formally established on 1 March 1862.
11 March 1862: The Army of the Mississippi transferred from the Department of the Missouri to the Department of the Mississippi.
11 March 1862: Major-General John Pope retained command of the Army of the Mississippi.
26 June 1862: The Army of the Mississippi transferred from the Department of the Mississippi to the District of the West Tennessee.
26 June 1862: Major-General William Starke Rosecrans assumed command of the Army of the Mississippi, succeeding Major-General John Pope.
16 October 1862: The Army of the Mississippi transferred from the District of West Tennessee to the Army of the Tennessee.
16 October 1862: Major-General William Starke Rosecrans retained command of the Army of the Mississippi.
24 October 1862: The Army of the Mississippi was discontinued, and incorporated into XIII Corps Tennessee.
Army of the Mississippi #2
4 January 1863-12 January 1863
John Alexander McClernand 4 January 1863-12 January 1863
4 January 1863: The “Army of the Mississippi” was established unofficially in the Department of the Tennessee.
4 January 1863: Major-General John Alexander McClernand assumed command of the unofficial “Army of the Mississippi”.
4 January 1863: XIII Corps Tennessee was temporarily discontinued, and renamed unofficially as “I Corps Mississippi”.
4 January 1863: The unofficial “I Corps Mississippi” was established in the “Army of the Mississippi” from the forces in XIII Corps Tennessee.
4 January 1863: XV Corps Tennessee was discontinued, and renamed unofficially as “II Corps Mississippi”.
4 January 1863: The unofficial “II Corps Mississippi” was established in the Army “of the Mississippi”.
12 January 1863: The unofficial “I Corps Mississippi” was discontinued, and re-designated as XIII Corps Tennessee.
12 January 1863: The unofficial “II Corps Mississippi” was discontinued, and re-designated as XV Corps Tennessee.
12 January 1863: The unofficial “Army of the Mississippi” was discontinued, and its forces transferred to the Army of the Tennessee.
Army of the Ohio #1
9 November 1861-24 October 1862
Don Carlos Buell 9 November 1861-30 September 1862
George Henry Thomas temporary 30 September 1862-1 October 1862
Don Carlos Buell 1 October 1862-24 October 1862
9 November 1861: The Army of the Ohio was established in the Department of the Ohio.
9 November 1861: Brigadier-General Don Carlos Buell was appointed to command the Army of the Ohio, arriving on 15 November 1861.
15 November 1861: Brigadier-General Don Carlos Buell arrived to command the Army of the Ohio
11 March 1862: The Army of the Ohio transferred to the Department of the Mississippi.
11 March 1862: Major-General Don Carlos Buell retained command of the Army of the Ohio.
19 August 1862: The Army of the Ohio transferred from the Department of the Mississippi to the Department of the Ohio.
19 August 1862: Major-General Don Carlos Buell retained command of the Army of the Ohio.
29 September 1862: I Corps Ohio was established in the Army of the Ohio.
29 September 1862: II Corps Ohio was established in the Army of the Ohio.
29 September 1862: III Corps Ohio was established in the Army of the Ohio from the “Army of Kentucky”
30 September 1862: Major-General George Henry Thomas assumed temporary command of the Army of the Ohio, succeeding Major-General Don Carlos Buell.
1 October 1862: Major-General Don Carlos Buell assumed command of the Army of the Ohio, succeeding Major-General George Henry Thomas.
24 October 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 11 and August 19 1862 the name “Army of the Ohio” continued to be used unofficially until 24 October 1862.
Army of the Ohio #2
11 April 1863-2 February 1865
Ambrose Everett Burnside 11 April 1863-9 December 1864
John Gray Foster 9 December 1864-9 February 1864
John McAllister Schofield 9 February 18645 May 1864
Jacob Dolson Cox temporary 5 May 1864-28 May 1864
John McAllister Schofield 28 May 1864-2 February 1865
11 April 1863: The Army of the Ohio was established in the Department of the Ohio.
11 April 1863: Major-General Ambrose Everett Burnside assumed command of the Army of the Ohio.
11 April 1863: IX Corps Ohio transferred from the Department of the Ohio to the Army of the Ohio.
28 May 1863: XXIII Corps Ohio was established in the Army of the Ohio.
5 June 1863: IX Corps transferred from the Army of the Ohio to the Department of the Tennessee.
25 August 1863: IX Corps Tennessee transferred from the Department of the Tennessee to the Army of the Ohio.
16 October 1863: The Army of the Ohio transferred to the Military Division of the Mississippi.
16 October 1863: Major-General Ambrose Everett Burnside retained command of the Army of the Ohio.
30 November 1863: Cavalry Corps Ohio was established in the Army of the Ohio.
9 December 1863: Major-General John Gray Foster assumed command of the Army of the Ohio, succeeding Major-General Ambrose Everett Burnside.
9 February 1864: Major-General John McAllister Schofield assumed command of the Army of the Ohio, succeeding Major-General John Gray Foster.
10 April 1864: Cavalry Corps Ohio was discontinued.
13 April 1864: IX Corps Ohio transferred from the Army of the Ohio to the Department of the Potomac.
5 May 1864: Brigadier-General Jacob Dolson Cox assumed temporary command of the Army of the Ohio, succeeding Major-General John McAllister Schofield.
28 May 1864: Major-General John McAllister Schofield assumed command of the Army of the Ohio, succeeding Brigadier-General Jacob Dolson Cox.
2 February 1865: XXIII Corps Ohio transferred to the Department of North Carolina but continued to be described unofficially as the “Army of the Ohio”.
2 February 1865: The Army of the Ohio was discontinued, and its field forces transferred as the XVIII Corps Ohio to the Department of North Carolina.
Army of the Tennessee
16 October 1862-1 August 1865
Ulysses Simpson Grant 16 October 1862-24 October 1863
William Tecumseh Sherman 24 October 1863-26 March 1864
James Birdseye McPherson 26 March 1864-22 July 1864
John Alexander Logan temporary 22 July 1864-27 July 1864
Oliver Otis Howard 27 July 1864-19 May 1865
John Alexander Logan 19 May 1865-1 August 1865
16 October 1862: The Army of the Tennessee was established in the Department of the Tennessee, comprising the former Army of West Tennessee.
16 October 1862: Major-General Ulysses Simpson Grant assumed command of the Army of the Tennessee.
24 October 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.
1 November 1862: Right Wing XIII Corps Tennessee was established in the Army of the Tennessee.
1 November 1862: Left Wing XIII Corps Tennessee was established in the Army of the Tennessee.
27 November 1862: Centre XIII Corps Tennessee was established in the Army of the Tennessee.
18 December 1862: XV Corps Tennessee was designated in the Army of the Tennessee.
18 December 1862: XVI Corps Tennessee was designated in the Army of the Tennessee.
18 December 1862: XVII Corps Tennessee was designated in the Army of the Tennessee.
22 December 1862: Centre XIII Corps Tennessee was discontinued, and incorporated into XVII Corps Tennessee.
22 December 1862: Left Wing XIII Corps Tennessee was discontinued, and incorporated into XVI Corps Tennessee and Left Wing XVI Corps Tennessee.
22 December 1862: Right Wing XIII Corps Tennessee was discontinued, and incorporated into XV Corps Tennessee.
22 December 1862: XV Corps Tennessee was established in the Army of the Tennessee.
22 December 1862: XVI Corps Tennessee was established in the Army of the Tennessee.
22 December 1862: Left Wing XVI Corps Tennessee was established in the Army of the Tennessee.
22 December 1862: XVII Corps Tennessee was established in the Army of the Tennessee.
4 January 1863: The “Army of the Mississippi” was established unofficially in the Department of the Tennessee.
4 January 1863: XIII Corps Tennessee was temporarily discontinued, and renamed unofficially as “I Corps Mississippi”.
4 January 1863: The unofficial “I Corps Mississippi” was established in the “Army of the Mississippi” from the forces in XIII Corps Tennessee.
4 January 1863: XV Corps Tennessee was temporarily discontinued, and renamed unofficially as “II Corps Mississippi”.
4 January 1863: The unofficial “II Corps Mississippi” was established in the Army “of the Mississippi”.
12 January 1863: The unofficial “Army of the Mississippi” was discontinued, and its forces transferred to the Army of the Tennessee.
12 January 1863: The unofficial “I Corps Mississippi” was discontinued, and re-designated as XIII Corps Tennessee.
12 January 1863: The unofficial “II Corps Mississippi” was discontinued, and re-designated as XV Corps Tennessee.
7 August 1863: XIII Corps Tennessee transferred from the Army of the Tennessee to the Army of the Gulf.
24 October 1863: Major-General William Tecumseh Sherman assumed command of the Army of the Tennessee, succeeding Major-General Ulysses Simpson Grant.
7 March 1864: Right Wing XVI Corps Tennessee was established in the Army of the Tennessee.
26 March 1864: Major-General James Birdseye McPherson assumed command of the Army of Tennessee, succeeding Major-General William Tecumseh Sherman.
22 July 1864: Major-General John Alexander Logan assumed temporary command of the Army of the Tennessee, succeeding Major-General James Birdseye McPherson.
27 July 1864: Major-General Oliver Otis Howard assumed command of the Army of the Tennessee, succeeding Major-General John Alexander Logan.
7 November 1864: XVI Corps Tennessee was discontinued.
7 November 1864: Right Wing XVI Corps Tennessee was discontinued, and renamed Detachment Army of the Tennessee XVI Corps.
7 November 1864: Left Wing XVI Corps Tennessee was discontinued.
7 November 1864: Detachment Army of the Tennessee XVI Corps established in the Army of the Tennessee.
24 November 1864: The Army of the Tennessee transferred from the Department of the Tennessee to the Military Division of the Mississippi.
24 November 1864: Detachment Army of the Tennessee XVI Corps transferred from the Army of the Tennessee to the Military Division of the Mississippi.
18 February 1865: Detachment Army of the Tennessee XVI Corps was discontinued, and its forces incorporated into XVI Corps Gulf.
19 May 1865: Major-General John Alexander Logan assumed command of the Army of the Tennessee, succeeding Major-General Oliver Otis Howard.
1 August 1865: XV Corps Tennessee was discontinued.
1 August 1865: XVII Corps Tennessee was discontinued.
1 August 1865: The Army of the Tennessee was discontinued.
Army of West Tennessee
21 February 1862-16 October 1862
Ulysses Simpson Grant 21 February 1862-16 October 1862
21 February 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”.
21 February 1862: Major-General Ulysses Simpson Grant assumed command of the Army of West Tennessee “Army of the Tennessee”.
11 March 1862: The Army of West Tennessee transferred from the District of West Tennessee to the Department of the Mississippi. The Army of West Tennessee was renamed unofficially the “Army of the Tennessee”.
11 March 1862L Major-General Ulysses Simpson Grant retained command of the Army of West Tennessee.
16 October 1862: The Army of West Tennessee was discontinued, and incorporated into the Army of the Tennessee.
Hooker’s Command Cumberland
25 September 1863-14 April 1864
Joseph Hooker 25 September 1863-14 April 1864
25 September 1863: Hooker’s Command Cumberland established in the Department of the Cumberland to comprise XI Corps and XII Corps transferred from the Army of the Potomac to the Department of the Cumberland.
25 September 1863: Major-General Joseph Hooker assumed command of Hooker’s Command Cumberland.
25 September 1863: XI Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.
25 September 1863: XII Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.
14 April 1864: Hooker’s Command Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
I Corps Cumberland
24 October 1862-5 November 1862
Alexander McDowell McCook 24 October 1862-5 November 1862
24 October 1862: I Corps Cumberland was established in the Army of the Cumberland incorporating the former I Corps Ohio.
24 October 1862: Major-General Alexander McDowell McCook assumed command of I Corps Cumberland.
5 November 1862: I Corps Cumberland was formally discontinued, and renamed Right Wing XIV Corps Cumberland.
I Corps Mississippi
4 January 1863, to 12 January 1863
George Washington Morgan 4 January 1863-12 January 1863
4 January 1863: The unofficial “I Corps Mississippi” was established in the “Army of the Mississippi” incorporating XIII Corps Tennessee.
4 January 1863: Brigadier-General George Washington Morgan assumed command of “I Corps Mississippi”.
12 January 1863: The unofficial “I Corps Mississippi” was discontinued, and renamed XIII Corps Tennessee.
I Corps Ohio
29 September 1862-24 October 1862
Alexander McDowell McCook 29 September 1862-24 October 1862
29 September 1862: I Corps Ohio was established in the Army of the Ohio.
29 September 1862: Major-General Alexander McDowell McCook assumed command of I Corps Ohio.
24 October 1862: I Corps Ohio was discontinued, and its forces transferred to the Army of the Cumberland and renamed I Corps Cumberland.
II Corps Cumberland
24 October 1862-5 November 1862
Thomas Leonidas Crittenden 24 October 1862-5 November 1862
24 October 1862: II Corps Cumberland was established in the Army of the Cumberland incorporating the former II Corps Ohio.
24 October 1862: Major-General Thomas Leonidas Crittenden assumed command of Left Wing XIV Corps Cumberland.
5 November 1862: II Corps Cumberland was formally discontinued, and renamed Left Wing XIV Corps Cumberland.
II Corps Mississippi
4 January 1863, to 12 January 1863
William Tecumseh Sherman 4 January 1863-12 January 1863
4 January 1863: The unofficial “II Corps Mississippi” was established in the Army “of the Mississippi” incorporating XV Corps Tennessee.
4 January 1863: Major-General William Tecumseh Sherman assumed command of “II Corps Mississippi”.
12 January 1863: “II Corps Mississippi” was discontinued, and renamed XV Corps Tennessee.
II Corps Ohio
29 September 1862-24 October 1862
Thomas Leonidas Crittenden 29 September 1862-24 October 1862
29 September 1862: II Corps Ohio was established in the Army of the Ohio.
29 September 1862: Major-General Thomas Leonidas Crittenden assumed command of II Corps Ohio.
24 October 1862: II Corps Ohio was discontinued, and its forces transferred to the Army of the Cumberland and renamed II Corps Cumberland.
III Corps Cumberland
24 October 1862-5 November 1862
Charles Champion Gilbert 24 October 1862-5 November 1862
24 October 1862: III Corps Cumberland was established from the renamed III Corps Ohio.
24 October 1862: Brigadier-General Charles Champion Gilbert assumed command of III Corps Cumberland.
5 November 1862: III Corps Cumberland was discontinued and renamed Centre XIV Corps Cumberland.
III Corps Ohio
29 September 1862-24 October 1862
Charles Champion Gilbert 29 September 1862-10 October 1862
Gordon Granger 10 October 1862-24 October 1862
29 September 1862: III Corps Ohio was established in the Army of the Ohio from the “Army of Kentucky”.
29 September 1862: Brigadier-General Charles Champion Gilbert assumed command of III Corps Ohio.
10 October 1862: Major-General Gordon Granger assumed command of III Corps Ohio “Army of Kentucky”, succeeding Brigadier-General Charles Champion Gilbert.
24 October 1862: III Corps Ohio was discontinued, and its forces transferred to the Army of the Cumberland as III Corps Cumberland.
IV Corps Cumberland
28 September 1863-1 April 1865
Gordon Granger 28 September 1863-10 April 1864
Oliver Otis Howard 10 April 1864-27 July 1864
David Sloane Stanley 27 July 1864-1 December 1864
Thomas John Wood temporary 1 December 1864-31 January 1865
David Sloane Stanley 31 January 1865-1 April 1865
28 September 1863: IV Corps Cumberland was established in the Army of the Cumberland by consolidating the former XX Corps Cumberland and XXI Corps Cumberland.
28 September 1863: Major-General Gordon Granger was appointed to command IV Corps Cumberland, arriving on 10 October.
9 October 1863: XX Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
9 October 1863: XXI Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
9 October 1863: Reserve Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
10 October 1863: Major-General Gordon Granger arrived to command IV Corps Cumberland.
10 April 1864: Major-General Oliver Otis Howard assumed command of IV Corps Cumberland, succeeding Major-General Gordon Granger.
27 July 1864: Major-General David Sloane Stanley assumed command of IV Corps Cumberland, succeeding Major-General Oliver Otis Howard.
1 December 1864: Brigadier-General Thomas John Wood assumed temporary command of IV Corps Cumberland, succeeding Major-General David Sloane Stanley.
31 January 1865: Major-General David Sloane Stanley assumed command of IV Corps Cumberland, succeeding Major-General Thomas John Wood.
1 April 1865: IV Corps Cumberland was discontinued.
IX Corps Ohio #1
17 March 1863-5 June 1863
Ambrose Everett Burnside, 17 March 1863-20 March 1863
John Grubb Parke 20 March 1863-7 April 1863
Orlando Bolivar Willcox 6 April 1863-5 June 1863
17 March 1863: IX Corps Virginia transferred from the Department of Virginia to the Department of the Ohio.
17 March 1863: Major-General Ambrose Everett Burnside assumed command of IX Corps Ohio, succeeding Brigadier-General Orlando Bolivar Willcox.
20 March 1863: Major-General John Grubb Parke assumed command of IX Corps Ohio, succeeding Major-General Ambrose Everett Burnside.
6 April 1863 Brigadier-General Orlando Bolivar Willcox assumed command of IX Corps Ohio, succeeding Major-General John Grubb Parke.
11 April 1863: IX Corps Ohio transferred from the Department of the Ohio to the Army of the Ohio.
11 April 1863: Brigadier-General Orlando Bolivar Willcox retained command of IX Corps Ohio.
5 June 1863: IX Corps Ohio transferred from the Army of the Ohio to the Department of the Tennessee.
IX Corps Ohio #2
25 August 1863-13 April 1864
Robert Brown Potter temporary 25 August 1863-15 September 1863
John Grubb Parke temporary 15 September 1863-17 September 1863
Ambrose Everett Burnside 17 September 1863-17 January 1864
Orlando Bolivar Willcox temporary 17 January 1864-26 January 1864
John Grubb Parke 26 January 1864-16 March 1864
Orlando Bolivar Willcox temporary 16 March 1864-19 March 1864
John Grubb Parke 19 March 1864-13 April 1864
25 August 1863: IX Corps Tennessee transferred from the Department of the Tennessee to the Army of the Ohio.
25 August 1863: Brigadier-General Robert Brown Potter assumed temporary command of IX Corps Ohio, succeeding Major-General John Grubb Parke.
15 September 1863: Major-General John Grubb Parke assumed temporary command of IX Corps Ohio, succeeding Brigadier-General Robert Brown Potter.
17 September 1863: Major-General Ambrose Everett Burnside assumed command of IX Corps Ohio, succeeding Major-General John Grubb Parke.
17 January 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Ohio, succeeding Major-General Ambrose Everett Burnside.
26 January 1864: Major-General John Grubb Parke assumed command of IX Corps Ohio, succeeding Brigadier-General Orlando Bolivar Willcox.
16 March 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Ohio, succeeding Major-General John Grubb Parke.
19 March 1864: Major-General John Grubb Parke assumed command of IX Corps Ohio, succeeding Brigadier-General Orlando Bolivar Willcox.
13 April 1864: IX Corps Ohio transferred from the Army of the Ohio to the Department of the Potomac.
IX Corps Tennessee
5 June 1863-25 August 1863
John Grubb Parke 5 June 1863-25 August 1863
5 June 1863: IX Corps Ohio transferred from the Army of the Ohio to the Department of the Tennessee.
5 June 1863: Major-General John Grubb Parke assumed command of IX Corps Tennessee, succeeding Brigadier-General Orlando Bolivar Willcox.
25 August 1863: IX Corps Tennessee transferred from the Department of the Tennessee to the Army of the Ohio.
XI Corps Cumberland (Hooker’s Command)
25 September 1863-16 14 April 1864
Oliver Otis Howard 25 September 1863-21 January 1864
Carl Schurz temporary 21 January 1864-25 February 1864
Oliver Otis Howard 25 February 1864-14 April 1864
25 September 1863: XI Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.
25 September 1863: Major-General Oliver Otis Howard retained command of XI Corps Cumberland.
21 January 1864: Brigadier-General Carl Schurz assumed temporary command of XI Corps Cumberland, succeeding Major-General Oliver Otis Howard.
25 February 1864: Major-General Oliver Otis Howard assumed command of XI Corps Cumberland, succeeding Major-General Carl Schurz.
14 April 1864: XI Corps Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
XII Corps Cumberland (Hooker’s Command)
25 September 1863-16 October 1863
Henry Warner Slocum 25 September 1863-14 April 1864
25 September 1863: XII Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.
25 September 1863: Major-General Henry Warner Slocum retained command of XII Corps Cumberland.
14 April 1864: XII Corps Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
XIII Corps Tennessee #1
24 October 1862-4 January 1863
Ulysses Simpson Grant 24 October 1862-18 December 1862 interim 22 December 1862
John Alexander McClernand 18 December 1862-4 January 1863
24 October 1862: XIII Corps was established in the Army of the Tennessee.
24 October 1862: October 1862: Major-General Ulysses Simpson Grant assumed command of XIII Corps Tennessee.
1 November 1862: Right Wing XIII Corps Tennessee was established in the Army of the Tennessee.
1 November 1862: Left Wing XIII Corps Tennessee was established in the Army of the Tennessee.
27 November 1862: Centre XIII Corps Tennessee was established in the Army of the Tennessee.
18 December 1862: Major-General John Alexander McClernand was appointed to command XIII Corps Tennessee, arriving on 22 December 1862.
22 December 1862: Centre XIII Corps Tennessee was discontinued, and incorporated into XVII Corps Tennessee.
22 December 1862: Left Wing XIII Corps Tennessee was discontinued, and incorporated into XVI Corps Tennessee and Left Wing XVI Corps Tennessee.
22 December 1862: Right Wing XIII Corps Tennessee was discontinued, and incorporated into XV Corps Tennessee.
22 December 1862: Major-General John Alexander McClernand arrived to command XIII Corps Tennessee.
22 December 1862: The unofficial “I Corps Mississippi” was established in the “Army of the Mississippi” from forces in XIII Corps Tennessee.
4 January 1863: XIII Corps Tennessee was temporarily discontinued, and renamed unofficially as “I Corps Mississippi”.
XIII Corps Tennessee #2
12 January 1863-7 August 1863
George Washington Morgan 12 January 1863-31 January 1863
John Alexander McClernand 31 January 1863-19 June 1863
Edward Otho Cresap Ord 19 June 1863-28 July 1863
Cadwalader Colden Washburn 28 July 1863-7 August 1863
12 January 1863: XIII Corps Tennessee was established in the Army of the Tennessee, incorporating the unofficial “I Corps Mississippi”.
12 January 1863: Brigadier-General George Washington Morgan assumed command of XIII Corps Tennessee.
31 January 1863: Major-General John Alexander McClernand assumed command of XIII Corps Tennessee, succeeding Major-General George Washington Morgan.
19 June 1863: Major-General Edward Otho Cresap Ord assumed command of XIII Corps Tennessee, succeeding Major-General John Alexander McClernand.
28 July 1863: Major-General Cadwalader Colden Washburn assumed command of XIII Corps Tennessee, succeeding Major-General Edward Otho Cresap Ord.
7 August 1863: XIII Corps Tennessee transferred from the Army of the Tennessee to the Department of the Gulf.
Centre XIII Corps Tennessee
27 November 1862-22 December 1862
James Birdseye McPherson 27 November 1862-22 December 1862
27 November 1862: Centre XIII Corps Tennessee was established in the Army of the Tennessee.
27 November 1862: Major-General James Birdseye McPherson assumed command of Centre XIII Corps Tennessee.
22 December 1862: Centre XIII Corps Tennessee was discontinued, and incorporated into XVII Corps Tennessee.
Left Wing XIII Corps Tennessee
1 November 1862-22 December 1862
Charles Smith Hamilton 1 November 1862-22 December 1862
1 November 1862: Left Wing XIII Corps Tennessee was established in the Army of the Tennessee.
1 November 1862: Major-General Charles Smith Hamilton assumed command of Left Wing XIII Corps Tennessee.
22 December 1862: Left Wing XIII Corps Tennessee was discontinued, and incorporated into XVI Corps Tennessee and Left Wing XVI Corps Tennessee.
Right Wing XIII Corps Tennessee
1 November 1862-22 December 1862
James Birdseye McPherson 1 November 1862-27 November 1862
William Tecumseh Sherman 27 November 1862-22 December 1862
1 November 1862: Right Wing XIII Corps Tennessee was established in the Army of the Tennessee.
1 November 1862: Major-General James Birdseye McPherson assumed command of Right Wing XIII Corps Tennessee.
27 November 1862: Major-General William Tecumseh Sherman assumed command of Right Wing XIII Corps Tennessee, succeeding Major-General James Birdseye McPherson.
22 December 1862: Right Wing XIII Corps Tennessee was discontinued, and incorporated into XV Corps Tennessee.
XIV Corps Cumberland
24 October 1862-7 November 1864
William Starke Rosecrans 24 October 1862-9 January 1863
George Henry Thomas 9 January 1863-28 October 1863
John McAuley Palmer 28 October 1863-7 August 1864
Richard W Johnson temporary 7 August 1864-24 August 1864
Jefferson Columbus Davis 24 August 1864-7 November 1864
24 October 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.
24 October 1862: I Corps Ohio transferred to the Army of the Cumberland and renamed I Corps Cumberland.
24 October 1862: II Corps Ohio transferred to the Army of the Cumberland and renamed II Corps Cumberland.
24 October 1862: III Corps Ohio transferred to the Army of the Cumberland and renamed III Corps Cumberland.
24 October 1862: Major-General William Starke Rosecrans assumed command of XIV Corps Cumberland.
5 November 1862: I Corps Cumberland was discontinued, and renamed Right Wing XIV Corps Cumberland. 5 November 1862: II Corps Cumberland was discontinued, and renamed Left Wing XIV Corps Cumberland.
5 November 1862: III Corps Cumberland was discontinued, and renamed Centre XIV Corps Cumberland.
5 November 1862: Right Wing XIV Corps Cumberland was established in XIV Corps Cumberland.
5 November 1862: Left Wing XIV Corps Cumberland was established in XIV Corps Cumberland.
5 November 1862: Centre XIV Corps Cumberland was established in XIV Corps Cumberland.
9 January 1863: Centre XIV Corps Cumberland was discontinued, and renamed XIV Corps Cumberland.
9 January 1863: XIV Corps was reorganised in the Army of the Cumberland, incorporating forces from Centre XIV Corps Cumberland.
9 January 1863: Major-General George Henry Thomas assumed command of XIV Corps Cumberland.
28 October 1863: Major-General John McAuley Palmer assumed command of XIV Corps Cumberland, succeeding Major-General George Henry Thomas.
7 August 1864: Brigadier-General Richard W Johnson assumed temporary command of XIV Corps Cumberland, succeeding Major-General John McAuley Palmer.
24 August 1864: Brigadier-General Jefferson Columbus Davis assumed command of XIV Corps Cumberland, succeeding Brigadier-General Richard W Johnson.
7 November 1864: XIV Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
XIV Corps Georgia
7 November 1864-17 June 1865
Jefferson Columbus Davis 7 November 1864-17 June 1865
7 November 1864: XIV Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
7 November 1864: Brigadier-General Jefferson Columbus Davis retained command of XIV Corps “Georgia”.
28 March 1865: XIV Corps Cumberland was assigned officially to the Army of Georgia.
28 March 1865: Brigadier-General Jefferson Columbus Davis retained command of XIV Corps Georgia.
17 June 1865: XIV Corps Georgia transferred from the Army of Georgia to the Military Division of the Mississippi.
17 June 1865: XIV Corps Georgia transferred from the discontinued Army of Georgia to the Military Division of the Mississippi.
XIV Corps Mississippi
17 June 1865-1 August 1865
Jefferson Columbus Davis 17 June 1865-1 August 1865
17 June 1865: XIV Corps Georgia transferred from the discontinued Army of Georgia to the Military Division of the Mississippi.
17 June 1865: Brigadier-General Jefferson Columbus Davis retained command of XIV Corps Mississippi.
1 August 1865: XIV Corps Mississippi was discontinued.
Centre XIV Corps Cumberland
5 November 1862-9 January 1863
George Henry Thomas 5 November 1862-9 January 1863
5 November 1862: Centre XIV Corps Cumberland was established in the Army of the Cumberland incorporating the former III Corps Cumberland.
5 November 1862: Major-General George Henry Thomas assumed command of Centre XIV Corps Cumberland, succeeding Brigadier-General Charles Champion Gilbert.
9 January 1863: Centre XIV Corps Cumberland was discontinued, and incorporated into XIV Corps Cumberland.
Left Wing XIV Corps Cumberland
5 November 1862-9 January 1863
Thomas Leonidas Crittenden 5 November 1862-9 January 1863
5 November 1862: Left Wing XIV Corps Cumberland was established in the Army of the Cumberland incorporating the former II Corps Cumberland.
5 November 1862: Major-General Thomas Leonidas Crittenden retained command of Left Wing XIV Corps Cumberland.
9 January 1863: Left Wing XIV Corps Cumberland was discontinued, and renamed XXI Corps Cumberland.
Right Wing XIV Corps Cumberland
5 November 1862-9 January 1863
Alexander McDowell McCook 5 November 1862-9 January 1863
5 November 1862: Right Wing XIV Corps Cumberland was established in the Army of the Cumberland incorporating the former I Corps Cumberland.
5 November 1862: Major-General Alexander McDowell McCook retained command of Right Wing XIV Corps Cumberland.
9 January 1863: Right Wing XIV Corps Cumberland was discontinued, and renamed XX Corps Cumberland.
XV Corps Tennessee #1
18 December 1862-4 January 1863
William Tecumseh Sherman 18 December 1862-4 January 1863
18 December 1862: XV Corps Tennessee was designated for the forces taking part in the Yazoo Expedition.
18 December 1862: Major-General William Tecumseh Sherman was appointed to command XV Corps Tennessee, arriving on 22 December 1862.
22 December 1862: XV Corps Tennessee was established in the Army of the Tennessee, comprising the former Right Wing XIII Corps Tennessee.
22 December 1862: Major-General William Tecumseh Sherman arrived to command XV Corps Tennessee.
4 January 1863: XV Corps Tennessee was discontinued, and named unofficially as “II Corps Mississippi”.
XV Corps Tennessee #2
12 January 1863-1 August 1865
William Tecumseh Sherman 12 January 1863-29 October 1863
Francis Preston Blair 29 October 1863-11 December 1863
John Alexander Logan 11 December 1863-22 July 1864
Morgan Lewis Smith temporary 22 July 1864-27 July 1864
John Alexander Logan 27 July 1864-2 September 1864
Peter Joseph Osterhaus 23 September 1864-8 January 1865
John Alexander Logan 8 January 1865-23 May 1865
William Babcock Hazen 23 May 1865-1 August 1865
12 January 1863: XV Corps Tennessee was re-established in the Army of the Tennessee from “II Corps Mississippi”.
12 January 1863: Major-General William Tecumseh Sherman assumed command of XV Corps Tennessee.
29 October 1863: Major-General Francis Preston Blair assumed command of XV Corps Tennessee, succeeding Major-General William Tecumseh Sherman.
11 December 1863: Major-General John Alexander Logan assumed command of XV Corps Tennessee, succeeding Major-General Francis Preston Blair.
22 July 1864: Brigadier-General Morgan Lewis Smith assumed temporary command of XV Corps Tennessee, Major-General Union John Alexander Logan.
27 July 1864: Major-General John Alexander Logan assumed command of XV Corps Tennessee, succeeding Brigadier-General Morgan Lewis Smith.
23 September 1864: Major-General Peter Joseph Osterhaus assumed command of XV Corps Tennessee, succeeding Major-General John Alexander Logan.
8 January 1865: Major-General John Alexander Logan assumed command of XV Corps Tennessee, succeeding Major-General Peter Joseph Osterhaus.
23 May 1865: Major-General William Babcock Hazen assumed command of XV Corps Tennessee, succeeding Major-General John Alexander Logan.
1 August 1865: XV Corps Tennessee was discontinued.
XVI Corps Tennessee
18 December 1862-7 November 1864
Stephen Augustus Hurlbut 18 December 1862-10 January 1863
Charles Smith Hamilton temporary 10 January 1863-5 February 1863
Stephen Augustus Hurlbut 5 February 1863-15 October 1863
Napoleon Jackson Tecumseh Dana 15 October 1863-16 April 1864
Vacant 17 April 1864-14 October 1864
Napoleon Jackson Tecumseh Dana 15 October 1864-7 November 1864
18 December 1862: XVI Corps Tennessee was designated in the Army of the Tennessee.
18 December 1862: Major-General Stephen Augustus Hurlbut was appointed to command XVI Corps Tennessee, arriving on 22 December 1862.
22 December 1862: XVI Corps Tennessee was formally established in the Army of the Tennessee.
22 December 1862: Major-General Stephen Augustus Hurlbut assumed command of XVI Corps Tennessee.
10 January 1863: Major-General Charles Smith Hamilton assumed temporary command of XVI Corps Tennessee, succeeding Major-General Stephen Augustus Hurlbut.
20 January 1863: XVI Corps Tennessee was reorganised as an administrative organisation supervising forces in transit and those dispersed around Memphis, La Grange and Corinth.
5 February 1863: Major-General Stephen Augustus Hurlbut assumed command of XVI Corps Tennessee, succeeding Major-General Charles Smith Hamilton.
15 October 1863: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of XVI Corps Tennessee, succeeding Major-General Stephen Augustus Hurlbut.
7 March 1864: Right Wing XVI Corps Tennessee was established in the Army of the Tennessee.
17 April 1864: Command of XVI Corps Tennessee became vacant.
17 April 1864: Left Wing XVI Corps Tennessee continued to operate autonomously without Corps command.
17 April 1864: Right Wing XVI Corps Tennessee continued to operate autonomously without Corps command.
15 October 1864: Brigadier-General Napoleon Jackson Tecumseh Dana assumed command of XVI Corps Tennessee, following a vacancy.
7 November 1864: Right Wing XVI Corps Tennessee was discontinued, and was renamed Detachment Army of the Tennessee XVI Corps, and unofficially as XVI Corps Tennessee
7 November 1864: Left Wing XVI Corps Tennessee was discontinued.
7 November 1864: XVI Corps Tennessee was discontinued.
Detachment Army of the Tennessee (XVI Corps #2)
7 November 1864-18 February 1865
Andrew Jackson Smith 7 November 1864-18 February 1865
7 November 1864: Detachment Army of the Tennessee XVI Corps established in the Army of the Tennessee from the discontinued Right Wing XVI Corps Tennessee.
7 November 1864: Major-General Andrew Jackson Smith assumed command of Detachment Army of the Tennessee XVI Corps.
24 November 1864: Detachment Army of the Tennessee XVI Corps transferred from the Army of the Tennessee to the Military Division of the Mississippi.
24 November 1864: Major-General Andrew Jackson Smith retained command of Detachment Army of the Tennessee XVI Corps.
18 February 1865: Detachment Army of the Tennessee XVI Corps was discontinued, and renamed XVI Corps Gulf in the Army of the Gulf
Left Wing XVI Corps Tennessee
22 December 1862-7 November 1864
Charles Smith Hamilton 22 December 1862-1 April 1863
Vacant 1 April 1863-6 July 1863
Grenville Mellen Dodge 7 July 1863
August Mersy 7 August 1863-3 September 1863
Eugene Asa Carr 3 September 1863-15 September 1863
Grenville Mellen Dodge 15 September 1863-19 August 1864
Thomas Edward Greenfield Ransom 19 August 1864-15 October 1864
Grenville Mellen Dodge 15 October 1864-7 November 1864
22 December 1862: Left Wing XVI Corps Tennessee was established in the Army of the Tennessee.
22 December 1862: Major-General Charles Smith Hamilton assumed command of Left Wing XVI Corps Tennessee.
1 April 1863: Command of Left Wing XVI Corps became vacant.
7 July 1863: Brigadier-General Grenville Mellen Dodge assumed command of Left Wing XVI Corps Tennessee, filling a vacancy since 1 April 1863.
7 August 1863: Colonel August Mersy assumed command of Left Wing XVI Corps Tennessee, succeeding Major-General Grenville Mellen Dodge.
3 September 1863: Brigadier-General Eugene Asa Carr assumed command of Left Wing XVI Corps Tennessee, succeeding Colonel August Mersy.
15 September 1863: Brigadier-General Grenville Mellen Dodge assumed command of Left Wing XVI Corps Tennessee, succeeding Brigadier-General Eugene Asa Carr.
19 August 1864: Brigadier-General Thomas Edward Greenfield Ransom assumed command of Left Wing XVI Corps Tennessee, succeeding Major-General Grenville Mellen Dodge. Tennessee.
15 October 1864: Brigadier-General Grenville Mellen Dodge assumed command of Left Wing XVI Corps Tennessee, succeeding Brigadier-General Thomas Edward Greenfield Ransom.
17 April 1864: Command of XVI Corps Tennessee became vacant.
17 April 1864: Left Wing XVI Corps Tennessee and Right Wing XVI Corps Tennessee continued to operate autonomously without Corps command.
7 November 1864: Left Wing XVI Corps Tennessee was discontinued.
Right Wing XVI Corps Tennessee
7 March 1864-7 November 1864
Andrew Jackson Smith 7 March 1864-7 November 1864
7 March 1864: Right Wing XVI Corps Tennessee was established in the Army of the Tennessee.
7 March 1864: Brigadier-General Andrew Jackson Smith assumed command of Right Wing XVI Corps Tennessee.
7 November 1864: Right Wing XVI Corps Tennessee was discontinued, and renamed Detachment Army of the Tennessee XVI Corps.
XVII Corps Tennessee
18 December 1862-1 August 1865
James Birdseye McPherson 18 December 1862-23 April 1864
Francis Preston Blair temporary 23 April 1864-3 May 1864, 4 May 1864-22 September 1864
Thomas Edward Greenfield Ransom 22 September 1864-10 October 1864
Mortimer Dormer Leggett temporary 10 October 1864-24 October 1864
Joseph Anthony Mower 24 October 1864-31 October 1864
Francis Preston Blair 31 October 1864-8 May 1865
Mortimer Dormer Leggett temporary 8 May 1865-9 May 1865
Francis Preston Blair 9 May 1865-24 June 1865
Mortimer Dormer Leggett temporary 24 June 1865-1 July 1865
Francis Preston Blair 1 July 1865-19 July 1865
William Worth Belknap 19 July 1865-1 August 1865
18 December 1862: XVII Corps Tennessee was designated in the Army of the Tennessee from the former Centre XIII Corps Tennessee.
18 December 1862: Major-General James Birdseye McPherson was appointed to command XVII Corps Tennessee, arriving on 22 December 1862.
22 December 1862: XVII Corps Tennessee was formally established in the Army of the Tennessee.
22 December 1862: Major-General James Birdseye McPherson assumed command of XVII Corps Tennessee.
23 April 1864: Major-General Francis Preston Blair assumed temporary command of XVII Corps, succeeding Major-General James Birdseye McPherson.
4 May 1864: Major-General Francis Preston Blair assumed full command of XVII Corps Tennessee.
22 September 1864: Brigadier-General Thomas Edward Greenfield Ransom assumed command of XVII Corps Tennessee, succeeding Major-General Francis Preston Blair.
10 October 1864: Brigadier-General Mortimer Dormer Leggett assumed temporary command of XVII Corps Tennessee, succeeding Brigadier-General Thomas Edward Greenfield Ransom.
24 October 1864: Major-General Joseph Anthony Mower assumed command of XVII Corps Tennessee, succeeding Brigadier-General Mortimer Dormer Leggett.
31 October 1864: Major-General Francis Preston Blair assumed command of XVII Corps Tennessee, succeeding Major-General Joseph Anthony Mower.
8 May 1865: Brigadier-General Mortimer Dormer Leggett assumed temporary command of XVII Corps Tennessee, succeeding Major-General Francis Preston Blair.
9 May 1865: Major General Francis Preston Blair assumed command of XVII Corps Tennessee, succeeding Brigadier-General Mortimer Dormer Leggett.
24 June 1865: Brigadier-General Mortimer Dormer Leggett assumed temporary command of XVII Corps Tennessee, succeeding Major-General Francis Preston Blair.
1 July 1865: Major-General Francis Preston Blair assumed command of XVII Corps Tennessee, succeeding Brigadier-General Mortimer Dormer Leggett.
19 July 1865: Brigadier-General William Worth Belknap assumed command of XVII Corps Tennessee, succeeding Major-General Francis Preston Blair.
1 August 1865: XVII Corps Tennessee was discontinued.
XX Corps Cumberland #1
9 January 1863-9 October 1863
Alexander McDowell McCook 9 January-9 October 1863
9 January 1863: XX Corps Cumberland was established in the Army of the Cumberland, comprising forces from Right Wing XIV Corps Cumberland.
9 January 1863: Major-General Alexander McDowell McCook assumed command of XX Corps Cumberland.
9 October 1863: XX Corps Cumberland was discontinued and incorporated into IV Corps Cumberland.
XX Corps Cumberland #2
14 April 1864—7 November 1864
Joseph Hooker 14 April 1864-28 July 1864
Alpheus Starkey Williams interim 28 July 1864-28 August 1864
Henry Warner Slocum 28 August 1864-7 November 1864
14 April 1864: XX Corps Cumberland was established in the Army of the Cumberland.
14 April 1864: XI Corps Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
14 April 1864: XII Corps Cumberland was discontinued, and its forces incorporated into XX Corps Cumberland.
14 April 1864: Major-General Joseph Hooker assumed command of XX Corps Cumberland.
28 July 1864: Major-General Henry Warner Slocum was appointed to command XX Corps Cumberland, arriving on 27 August 1864, to succeed Major-General Joseph Hooker.
28 July 1864: Brigadier-General Alpheus Starkey Williams assumed interim command of XX Corps Cumberland, succeeding Major-General Joseph Hooker.
28 August 1864: Major-General Henry Warner Slocum arrived to command XX Corps Cumberland, succeeding Brigadier-General Alpheus Starkey Williams.
7 November 1864: XX Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
XX Corps Georgia
7 November 1864-1 June 1865
Henry Warner Slocum 7 November 1864-11 November 1864
Alpheus Starkey Williams 11 November 1864-1 April 1865
Joseph Anthony Mower 1 April 1865-1 June 1865
7 November 1864: XX Corps Cumberland transferred from the Army of the Cumberland to the “Army of Georgia”.
7 November 1864: Major-General Henry Warner Slocum retained command of XX Corps “Georgia”.
11 November 1864: Brigadier-General Alpheus Starkey Williams assumed command of XX Corps Georgia, succeeding Major-General Henry Warner Slocum.
28 March 1865: XX Corps Georgia was assigned officially to the Army of Georgia.
28 March 1865: Brigadier-General Alpheus Starkey Williams retained command of XX Corps Georgia.
1 April 1865: Major-General Joseph Anthony Mower assumed command of XX Corps Georgia, succeeding Brigadier-General Alpheus Starkey Williams.
1 June 1865: XX Corps Georgia was discontinued.
XXI Corps Cumberland
9 January 1863-9 October 1863
Thomas Leonidas Crittenden 9 January 1863-19 February 1863
Thomas John Wood temporary 19 February 1863-19 March 1863
Thomas Leonidas Crittenden 19 March 1863-15 July 1863
John McAuley Palmer temporary 15 July 1863-17 August 1863
Thomas Leonidas Crittenden 17 August 1863-9 October 1863
9 January 1863: XXI Corps Cumberland was established in the Army of the Cumberland, comprising forces from Left Wing XIV Corps Cumberland.
9 January 1863: Major-General Thomas Leonidas Crittenden assumed command of XXI Corps Cumberland.
19 February 1863: Brigadier-General Thomas John Wood assumed command of XXI Corps Cumberland, succeeding Major-General Thomas Leonidas Crittenden.
19 March 1863: Major-General Thomas Leonidas Crittenden assumed command of XXI Corps Cumberland, succeeding Brigadier-General Thomas John Wood.
15 July 1863: Major-General John McAuley Palmer assumed temporary command of XXI Corps Cumberland, succeeding Major-General Thomas Leonidas Crittenden.
17 August 1863: Major-General Thomas Leonidas Crittenden assumed command of XXI Corps Cumberland, succeeding Major-General John McAuley Palmer.
9 October 1863: XXI Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
XXIII Corps Ohio
28 May 1863-2 February 1865
George Lucas Hartsuff 28 May 1863-24 September 1863
Mahlon Dickerson Manson 24 September 1863-2 December 1863
Jacob Dolson Cox 2 December 1863-10 February 1864
George Stoneman 10 February 1864-4 April 1864 interim 9 April 1864
John McAllister Schofield 4 April 1864-26 May 1864
Jacob Dolson Cox temporary 26 May 1864-28 May 1864
John McAllister Schofield 28 May 1864-14 September 1864
Jacob Dolson Cox temporary 14 September 1864-22 October 1864
John McAllister Schofield 22 October 1864-2 February 1865
28 May 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”.
28 May 1863: Major-General George Lucas Hartsuff assumed command of XXIII Corps Ohio.
24 September 1863: Brigadier-General Mahlon Dickerson Manson assumed command of XXIII Corps Ohio, succeeding Major-General George Lucas Hartsuff.
2 December 1863: Brigadier-General Jacob Dolson Cox assumed command of XXIII Corps Ohio, succeeding Brigadier-General Mahlon Dickerson Manson.
10 February 1864: Major-General George Stoneman assumed command of XXIII Corps Ohio, succeeding Brigadier-General Jacob Dolson Cox.
4 April 1864: Major-General John McAllister Schofield was appointed to command XXIII Corps Ohio, arriving on 9 April 1864.
9 April 1864: Major-General John McAllister Schofield arrived to command XXIII Corps Ohio, succeeding Major-General George Stoneman.
26 May 1864: Brigadier-General Jacob Dolson Cox assumed temporary command of XXIII Corps Ohio, succeeding Major-General John McAllister Schofield.
28 May 1864: Major-General John McAllister Schofield assumed command of XXIII Corps Ohio, succeeding Brigadier-General Jacob Dolson Cox.
14 September 1864: Brigadier-General Jacob Dolson Cox assumed temporary command of XXIII Corps Ohio, succeeding Major-General John McAllister Schofield.
22 October 1864: Major-General John McAllister Schofield assumed command of XXIII Corps Ohio, succeeding Brigadier-General Jacob Dolson Cox.
2 February 1865: XXIII Corps Ohio transferred to the Department of North Carolina, retaining the unofficial name of the “Army of the Ohio”.
Cavalry Corps Cumberland
24 October 1862—29 October 1864
John Kennett 24 October 1862-24 November 1862
David Sloane Stanley 24 November 1862-9 September 1863
Robert Byington Mitchell temporary 9 September 1863-9 November 1863
David Sloane Stanley 9 November 1863-20 November 1863
Washington Lafayette Elliott 20 November 1863-19 August 1864
Richard W Johnson temporary 19 August 1864-9 September 1864
Washington Lafayette Elliott 9 September 1864-29 October 1864
24 October 1862: Cavalry Corps Cumberland was established in the Army of the Cumberland.
24 October 1862: Colonel John Kennett assumed temporary command of Cavalry Corps Cumberland.
24 November 1862: Brigadier-General David Sloane Stanley assumed command of Cavalry Corps Cumberland, succeeding Colonel John Kennett.
9 September 1863: Brigadier-General Robert Byington Mitchell assumed temporary command of Cavalry Corps Cumberland, succeeding Major-General David Sloane Stanley.
9 November 1863: Major-General David Sloane Stanley assumed command of Cavalry Corps Cumberland, succeeding Brigadier-General Richard W Johnson.
20 November 1863: Brigadier-General Washington Lafayette Elliott assumed command of Cavalry Corps Cumberland, succeeding Major-General David Sloane Stanley.
19 August 1864: Brigadier-General Richard W Johnson assumed temporary command of Cavalry Corps Cumberland, succeeding Brigadier-General Washington Lafayette Elliott.
9 September 1864: Brigadier-General Washington Lafayette Elliott assumed command of Cavalry Corps Cumberland, succeeding Brigadier-General Richard W Johnson.
29 October 1864: Cavalry Corps Cumberland was discontinued, and renamed as Cavalry Corps Military Division of the Mississippi.
Cavalry Corps Mississippi
29 October 1864-17 April 1865
James Harrison Wilson 29 October 1864-17 April 1865
29 October 1864: Cavalry Corps Military Division of the Mississippi was established in the Military Division of the Mississippi from the former Cavalry Corps Cumberland.
29 October 1864: Brigadier-General James Harrison Wilson assumed command of Cavalry Corps Military Division of the Mississippi.
17 April 1865: Cavalry Corps Military Division of the Mississippi was discontinued.
Cavalry Corps Ohio
30 November 1863-10 April 1864
James Murrell Shackelford 30 November 1863-15 December 1863
Samuel Davis Sturgis 15 December 1863-10 April 1864
30 November 1863: Cavalry Corps Ohio was established in the Army of the Ohio.
30 November 1863: Brigadier-General James Murrell Shackelford assumed command of Cavalry Corps Ohio.
15 December 1863: Samuel Davis Sturgis assumed command of Cavalry Corps Ohio, succeeding Brigadier-General James Murrell Shackelford.
10 April 1864: Cavalry Corps Ohio was discontinued.
Reserve Corps Cumberland
8 June 1863-9 October 1863
Gordon Granger 8 June 1863-9 October 1863
8 June 1863: Reserve Corps Cumberland was established in the Department of the Cumberland, incorporating the former Army of Kentucky.
8 June 1863: Major-General Gordon Granger assumed command of Reserve Corps Cumberland.
9 October 1863: Reserve Corps Cumberland was discontinued, and incorporated into IV Corps Cumberland.
American Civil War High Command 