Union Organisations – Corps and Equivalents

Union Organisations – Corps and Equivalents

Military forces were combined in varying sizes and levels of complexity for active operations. The basic building blocks for combat operations were Regiments of infantry and cavalry. These were grouped into Brigades, and Brigades were grouped into Divisions. As forces grew in size, divisions were grouped in to Corps or other equivalent formations. An Army could designate a force as small as a few brigades or as number dozens of brigades in their respective divisions and Corps.

Corps

Corps were not authorised officially in the Union army until 17 July 1862. However, the term was already in unofficial use prior to this date.

Note: The current convention to use Roman Numerals to designate Army Corps was not in use. The orthography of numeral for Brigades, Divisions and Corps is a recent convention. During the Civil War, Corps were typically designated in words; for example, First Corps or Twenty-Fifth Corps etc. Divisions and Brigade are normally given ordinal numbers within their Division and Corps, e.g., 1st Brigade, 2nd Division, III Corps. This is often abbreviated in current practice to 1/2/III. The orthography of the time was First Brigade Second Division, Third Corps; with a punctilious regard to punctuation.

At first, Corps were numbered unofficially to describe large formations within an army; I Corps, II Corps and III Corps were named in the Army of the Potomac, the Army of Virginia, the unofficial Army of the Mississippi, the Army of the Ohio, and the Army of the Cumberland. This resulted in duplication of the terms I Corps to VI Corps for different forces. Some designations, for example IV Corps and XX Corps, were used more than once after the initial force was discontinued and a new one was designated using the same numeral. After the official authorisation of Corps commands, Corps designations became more regularised and they were numbered officially from I Corps to XXV Corps, albeit with some exceptions and duplications.

There were never twenty-five-active Army Corps at one time as Corps might be broken up and reformed for temporary operations or re-assigned to different armies. Sometimes the designation of their constituent parts became confused or anomalous. Several Corps were discontinued and some were re-activated or transferred to new Departments. A few Corps remained in existence and comprised substantially similar constituent units from the early years almost until the end of the war e. g., II Corps, VI Corps, while others were comparatively short-lived. Most Corps were discontinued, merged, or significantly reorganised on at least one, and some on several occasions. The transfer in and out or detachment of brigades or even divisions from Corps was common.

The term Wing could be used informally to describe a group of Corps within an army or a segment of an army but it was used in mid to late 1862 to describe the constituent parts of the Corps in the western theatre (e.g., XIII Corps and XIV Corps had a Left Wing and Right Wing and for XIC Corps a Centre Wing). These were actually Corps-sized units and were quickly re-designated and numbered as such. The term Grand Division was used in the winter of 1862 to designate four groupings of Corps within the Army of the Potomac. This practice was short-lived and never repeated, although Hooker’s Command in the Department of the Cumberland in 1863, and Sheridan’s Cavalry Command in the Army of the Potomac in 1865 were equivalent in structure to Grand Divisions. While Major-General William Tecumseh Sherman commanded several Corps from the Atlanta campaign of 1864 onwards, he retained the names of each Army for these groups rather than designating them as Grand Divisions. Similarly, in 1864 and 1865, Lieutenant-General Ulysses Simpson Grant retained the separate identities of the Army of the Potomac and Army of the James for the Virginia campaign of 1864 and 1865.

Some Corps numerals were discontinued and revived again for broadly similar forces in the same theatre. Some numerals were re-allocated to wholly different forces and in a different theatre e. g. IV Corps and XX Corps. Some Corps only ever served within one field army or Department while others (e. g., IX Corps, XIII Corps, XIX Corps) were transferred from Department to Department. Some Corps designations referred to field forces that never operated as integrated field commands but were administrative commands, overseeing reinforcements, training depots, garrisons, or local forces; e. g., VIII Corps, XVI Corps, XXII Corps.

Alphabetical Index

Centre Grand Division, Potomac 14 November 1862-5 February 1863

Left Grand Division, Potomac 14 November 1862-5 February 1863

Reserve Grand Division, Potomac 14 November 1862-5 February 1863

Right Grand Division. Potomac 14 November 1862-5 February 1863

Hooker’s Command Cumberland 25 September 1863-14 April 1864

Sheridan’s Cavalry Command Potomac 26 March 1865-6 May 1865

I Corps Cumberland 24 October 1862-5 November 1862

I Corps Mississippi 4 January 1863 to 12 January 1863

I Corps Ohio 29 September 1862-24 October 1862

I Corps Potomac #1 3 March 1862-4 April 1862

I Corps Potomac #2 12 September 1862-24 March 1864

I Corps Virginia 26 June 1862 12 September 1862

II Corps Cumberland 24 October 1862-5 November 1862

II Corps Mississippi 4 January 1863 to 12 January 1863

II Corps Ohio 29 September 1862-24 October 1862

II Corps Potomac 3 March 1862-28 June 1865

II Corps Virginia 26 June 1862 12 September 1862

III Corps Cumberland 24 October 1862-5 November 1862

III Corps Ohio 29 September 1862-24 October 1862

III Corps Potomac 3 March 1862-24 March 1864

III Corps Virginia 26 June 1862-12 September 1862

IV Corps Cumberland 28 September 1863-1 April 1865

IV Corps Potomac 3 March 1862-16 August 1862

IV Corps Virginia 16 August 1862-15 July 1863

IV Corps Virginia and North Carolina 15 July 1863-1 August 1863

V Corps Potomac #1 3 March 1862-4 April 1862

V Corps Potomac #2 18 May 1862-28 June 1865

VI Corps Potomac #1 18 May 1862-7 August 1864

VI Corps Potomac #2 6 December 1864-28 June 1865

VI Corps Shenandoah 7 August 1864-6 December 1864

VII Corps Arkansas 6 January 1864-1 August 1865

VIII Corps Atlantic 27 June 1865-1 August 1865

VIII Corps Middle 12 July 1862-27 June 1865

IX Corps Ohio #1 17 March 1863-5 June 1863

IX Corps Ohio #2 25 August 1863-13 April 1864

IX Corps Potomac #1 22 July 1862-3 August 1862

IX Corps Potomac #2 3 September 1862-5 February 1863

IX Corps Potomac #3 13 April 1864-24 April 1865

IX Corps Tennessee 5 June 1863-25 August 1863

IX Corps Virginia #1 3 August 1862-3 September 1862

IX Corps Virginia #2 5 February 1863-17 March 1863

IX Corps Washington 24 April 1865-27 July 1865

X Corps James 28 April 1864-3 December 1864

X Corps North Carolina 23 March 1865-1 August 1865

X Corps South 3 September 1862-28 April 1864

XI Corps Cumberland (Hooker’s Command) 25 September 1863-16 14 April 1864

XI Corps Potomac 12 September 1862-25 September 1863

XII Corps Cumberland (Hooker’s Command 25 September 1863-16 October 1863

XII Corps Potomac 12 September 1862-25 September 1863

XIII Corps Gulf #1 7 August 1863-7 May 1864

XIII Corps Gulf #2 18 February 1865-20 July 1865

XIII Corps Tennessee #1 24 October 1862-4 January 1863

XIII Corps Tennessee #2 12 January 1863-7 August 1863

Centre XIII Corps Tennessee 27 November 1862-22 December 1862

Left Wing XIII Corps Tennessee 1 November 1862-22 December 1862

Right Wing XIII Corps Tennessee 1 November 1862-22 December 1862

XIV Corps Cumberland 24 October 1862-7 November 1864

XIV Corps Georgia 7 November 1864-17 June 1865

XIV Corps Mississippi 17 June 1865-1 August 1865

Centre XIV Corps Cumberland 5 November 1862-9 January 1863

Left Wing XIV Corps Cumberland 5 November 1862-9 January 1863

Right Wing XIV Corps Cumberland 5 November 1862-9 January 1863

XV Corps Tennessee #1 18 December 1862-4 January 1863

XV Corps Tennessee #2 12 January 1863-1 August 1865

XVI Corps Gulf 18 February 1865-20 July 1865

XVI Corps Tennessee 18 December 1862-7 November 1864

Detachment Army of the Tennessee (XVI Corps) 7 November 1864-18 February 1865

Left Wing XVI Corps Tennessee 22 December 1862-7 November 1864

Right Wing XVI Corps Tennessee 7 March 1864-7 November 1864

XVII Corps Tennessee 18 December 1862-1 August 1865

XVIII Corps James 2 May 1864-3 December 1864

XVIII Corps North Carolina #1 24 December 1862-15 July 1863

XVIII Corps North Carolina #2 16 August 1863-25 April 1864

XVIII Corps Virginia and North Carolina #1 15 July 1863-16 August 1863

XVIII Corps Virginia and North Carolina #2 25 April 1864-2 May 1864

XIX Corps Gulf 16 December 1862-7 November 1864

XIX Corps Shenandoah 7 November 1864-20 March 1865

XX Corps Cumberland #1 9 January 1863-9 October 1863

XX Corps Cumberland #2 14 April 1864—7 November 1864

XX Corps Georgia 7 November 1864-1 June 1865

XXI Corps Cumberland 9 January 1863-9 October 1863

XXII Corps Washington 2 February 1863-26 June 1865

XXIII Corps North Carolina 2 February 1865-1 August 1865

XXIII Corps Ohio 28 May 1863-2 February 1865

XXIV Corps James 3 December 1864-1 August 1865

XXV Corps James 3 December 1864-23 May 1865

XXV Corps Southwest 23 May 1865-4 June 1865

Cavalry Corps Cumberland 24 October 1862—29 October 1864

Cavalry Corps Mississippi 29 October 1864-17 April 1865

Cavalry Corps Ohio 30 November 1863-10 April 1864

Cavalry Corps Potomac 12 February 1863-27 June 1865

Cavalry Corps Shenandoah 7 August 1864-25 March 1865

Reserve Corps Cumberland 8 June 1863-9 October 1863

Reserve Corps Gulf 11 June 1864-17 January 1865

Terry’s Provisional Corps North Carolina 31 January 1865-23 March 1865

Terry’s Provisional Corps Virginia 18 January 1865-31 January 1865

Terry’s Provisional Corps Virginia and North Carolina 6 January 1865-18 January 1865

Centre Grand Division, Potomac

14 November 1862-5 February 1863

Joseph Hooker 14 November 1862-24 January 1863

George Gordon Meade 25 January 1863

14 November 1862: The Centre Grand Division was established in the Army of the Potomac.

14 November 1862: Major-General Joseph Hooker assumed command of the Centre Grand Division of the Army of the Potomac.

14 November 1862: III Corps Potomac transferred to the Centre Grand Division of the Army of the Potomac.

14 November 1862: V Corps Potomac transferred to the Centre Grand Division of the Army of the Potomac.

25 January 1863: Major-General George Gordon Meade assumed command of the Centre Grand Division of the Army of the Potomac, succeeding Major-General Joseph Hooker.

5 February 1863: III Corps Potomac transferred to the Army of the Potomac.

5 February 1863: V Corps Potomac transferred to the Army of the Potomac.

5 February 1863: The Centre Grand Division of the Army of the Potomac was discontinued.

Left Grand Division, Potomac

14 November 1862-5 February 1863

William Buel Franklin 14 November 1862-24 January 1863

William Farrar Smith 25 January 1863-5 February 1863

14 November 1862: The Left Grand Division was established in the Army of the Potomac.

14 November 1862: Major-General William Buel Franklin assumed command of the Left Grand Division of the Army of the Potomac.

14 November 1862: I Corps Potomac transferred to the Left Grand Division of the Army of the Potomac.

14 November 1862: VI Corps Potomac transferred to the Left Grand Division of the Army of the Potomac.

25 January 1863: Major-General William Farrar Smith assumed command of the Left Grand Division of the Army of the Potomac, succeeding Major-General William Buel Franklin.

5 February 1863: I Corps Potomac transferred to the Army of the Potomac.

5 February 1863: VI Corps Potomac transferred to the Army of the Potomac.

5 February 1863: The Left Grand Division of the Army of the Potomac was discontinued.

Reserve Grand Division, Potomac

14 November 1862-5 February 1863

Franz Sigel 14 November 1862-5 February 1863

14 November 1862: The Reserve Grand Division was established in the Army of the Potomac.

14 November 1862: Major-General Franz Sigel assumed command of the Reserve Grand Division of the Army of the Potomac.

14 November 1862: XI Corps Potomac transferred to the Reserve Grand Division of the Army of the Potomac.

14 November 1862: XII Corps Potomac transferred to the Reserve Grand Division of the Army of the Potomac.

5 February 1863: XI Corps Potomac transferred to the Army of the Potomac.

5 February 1863: XII Corps Potomac transferred to the Army of the Potomac.

5 February 1863: The Reserve Grand Division of the Army of the Potomac was discontinued.

Right Grand Division. Potomac

14 November 1862-5 February 1863

Edwin Vose Sumner 14 November 1862-24 January 1863

Darius Nash Couch 25 January 1863-5 February 1863

14 November 1862: The Right Grand Division was established in the Army of the Potomac.

14 November 1862: Major-General Edwin Vose Sumner assumed command of the Right Grand Division of the Army of the Potomac.

14 November 1862: II Corps Potomac transferred to the Right Grand Division of the Army of the Potomac.

14 November 1862: IX Corps Potomac transferred to the Right Grand Division of the Army of the Potomac.

25 January 1863: Major-General Darius Nash Couch assumed command of the Right Grand Division of the Army of the Potomac, succeeding Major-General Edward Vose Sumner.

5 February 1863: II Corps Potomac transferred to the Army of the Potomac.

5 February 1863: IX Corps Potomac transferred to the Department of Virginia.

5 February 1863: The Right Grand Division of the Army of the Potomac was discontinued.

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.

Sheridan’s Cavalry Command Potomac

26 March 1865-6 May 1865

Philip Henry Sheridan 26 March 1865-6 May 1865

26 March 1865: Sheridan’s Cavalry Command was established in the Department of the Potomac. It comprised the combined cavalry forces of the Army of the Potomac, the Army of the James, and the Army of the Shenandoah.

26 March 1865: Major-General Philip Henry Sheridan assumed command of Sheridan’s Cavalry Command Potomac. 26 March 1865: Cavalry Corps Potomac transferred from the Army of the Potomac to Sheridan’s Cavalry Command Potomac.

6 May 1865: Sheridan’s Cavalry Command James was discontinued.

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.

I Corps Potomac #1

3 March 1862-4 April 1862

Irvin McDowell 3 March 1862-4 April 1862

3 March 1862: I Corps Potomac was established in the Army of the Potomac.

3 March 1862: Brigadier-General Irvin McDowell assumed command of I Corps Potomac.

4 April 1862: I Corps Potomac was discontinued, and its forces incorporated into the Department of the Rappahannock.

I Corps Potomac #2

12 September 1862-24 March 1864

Joseph Hooker 12 September 1862-17 September 1862,

George Gordon Meade temporary 17 September 1862-28 September 1862

John Fulton Reynolds 29 September 1862-1 January 1863

James Samuel Wadsworth temporary 2 January 1863-3 January 1863

John Fulton Reynolds 4 January 1863-28 February 1863

James Samuel Wadsworth temporary 1 March 1863-8 March 1863

John Fulton Reynolds 9 March 1863-1 July 1863

Abner Doubleday 1 July 1863-2 July 1863

John Newton 2 July 1863-10 March 1864

James Samuel Wadsworth temporary 11 March 1864-14 March 1864

John Newton 14 March 186-24 March 1864

12 September 1862: I Corps Potomac was re-established, comprising the forces of the discontinued III Corps Army of Virginia.

12 September 1862: Major-General Joseph Hooker assumed command of I Corps Potomac.

17 September 1862: Major-General George Gordon Meade assumed temporary command of I Corps Potomac, succeeding Major-General Joseph Hooker.

29 September 1862: Brigadier-General John Fulton Reynolds assumed command of I Corps Potomac, succeeding Major-General George Gordon Meade.

14 November 1862: I Corps Potomac transferred to the Left Grand Division of the Army of the Potomac.

14 November 1862: Major-General John Fulton Reynolds retained command of I Corps Potomac.

2 January 1863: Brigadier-General James Samuel Wadsworth assumed temporary command of I Corps Potomac, succeeding Major-General John Fulton Reynolds.

4 January 1863: Major-General John Fulton Reynolds assumed command of I Corps Potomac, succeeding Brigadier-General James Samuel Wadsworth.

5 February 1863: I Corps Potomac transferred from the Left Grand Division Potomac to the Army of the Potomac.

5 February 1863:  Major-General John Fulton Reynolds retained command of I Corps Potomac.

1 March 1863: Brigadier-General James Samuel Wadsworth assumed temporary command of I Corps Potomac, succeeding Major-General John Fulton Reynolds.

9 March 1863: Major-General John Fulton Reynolds assumed command of I Corps Potomac, succeeding Brigadier-General James Samuel Wadsworth.

1 July 1863: Major-General Abner Doubleday assumed temporary command of I Corps Potomac, succeeding Major-General John Fulton Reynolds.

2 July 1863: Major-General John Newton assumed command of I Corps Potomac, succeeding Major-General Abner Doubleday.

11 March 1864: Brigadier-General James Samuel Wadsworth assumed temporary command of I Corps Potomac, succeeding Brigadier-General John Newton.

14 March 1864: Major-General John Newton assumed command of I Corps Potomac, succeeding Brigadier-General James Samuel Wadsworth.

24 March 1864: I Corps Potomac was discontinued, and its forces allocated to V Corps Potomac.

I Corps Virginia

26 June 1862 12 September 1862

John Charles Frémont 26 June 1862-28 June 1862

Robert Cumming Schenck temporary 28 June 1862-29 June 1862

Franz Sigel 29 June 1862-7 July 1862

Robert Cumming Schenck temporary 7 July 1862-12 July 1862

Franz Sigel 12 July 1862-12 September 1862

26 June 1862: I Corps Virginia was established, comprising the field forces formerly in the Mountain Department.

26 June 1862: Major-General John Charles Frémont assumed command I Corps Virginia.

28 June 1862: Brigadier-General Robert Cumming Schenck assumed temporary command I Corps Virginia, succeeding Major-General John Charles Frémont.

29 June 1862: Major-General Franz Sigel assumed command of I Corps Army of Virginia, succeeding Brigadier-General Robert Cumming Schenck.

7 July 1862: Brigadier-General Robert Cumming Schenck assumed temporary command of I Corps Virginia, succeeding Major-General Franz Sigel.

12 July 1862: Major-General Franz Sigel assumed command of I Corps Virginia, succeeding Brigadier-General Robert Cumming Schenck.

2 September 1862: Major-General Franz Sigel retained command of I Corps Virginia.

12 September 1862: I Corps Virginia was discontinued, and incorporated into XI Corps Potomac.

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.

II Corps Potomac

3 March 1862-28 June 1865

Edwin Vose Sumner 3 March 1862-6 October 1862

Darius Nash Couch 7 October 1862-25 December 1862

John Sedgwick 26 December 1862-25 January 1863

Oliver Otis Howard temporary 26 January 1863-2 February 1863

Darius Nash Couch 3 February 1863-22 May 1863

Winfield Scott Hancock 22 May 1863-1 July 1863

John Gibbon temporary 1 July 1863-2 July 1863

Winfield Scott Hancock 2 July 1863-3 July 1863

William Hays temporary 3 July 1863-16 August 1863

Gouverneur Kemble Warren 16 August 1863-26 August 1863

John Curtis Caldwell temporary 26 August 1863-2 September 1863

Gouverneur Kemble Warren 2 September 1863-10 October 1863

John Curtis Caldwell temporary 10 October 1863-12 October 1863

Gouverneur Kemble Warren 12 October 1863-16 December 1863

John Curtis Caldwell temporary 16 December 1863-29 December 1863

Gouverneur Kemble Warren 29 December 1863-9 January 1864

John Curtis Caldwell temporary 9 January 1864-13 January 1864

Gouverneur Kemble Warren 13 January 1864-24 March 1864

Winfield Scott Hancock 24 March 1864-18 June 1864

David Bell Birney temporary 18 June 1864-27 June 1864

Winfield Scott Hancock 27 June 1864-26 November 1864

Andrew Atkinson Humphreys 26 November 1864-15 February 1865

Gershom Mott temporary 15 February 1865-17 February 1865

Nelson Appleton Miles temporary 17 February 1865-25 February 1865

Andrew Atkinson Humphreys 25 February 1865-19 April 1865

Francis Channing Barlow temporary 19 April 1865-5 May 1865

Andrew Atkinson Humphreys 5 May 1865-9 June 1865

Gershom Mott temporary 9 June 1865-20 June 1865

Andrew Atkinson Humphreys 20 June 1865-28 June 1865

3 March 1862: II Corps Potomac was established in the Army of the Potomac.

3 March 1862: Brigadier-General Edwin Vose Sumner assumed command of II Corps Potomac.

7 October 1862: Major-General Darius Nash Couch assumed command of II Corps Potomac, succeeding Major-General Edwin Vose Sumner.

14 November 1862: II Corps Potomac transferred to the Right Grand Division of the Army of the Potomac.

14 November 1862: Major-General Darius Nash Couch retained command of II Corps Potomac.

26 December 1862: Major-General John Sedgwick assumed command of II Corps Potomac, succeeding Major-General Darius Nash Couch.

26 January 1863: Major-General Oliver Otis Howard assumed temporary command of II Corps Potomac, succeeding Major-General John Sedgwick.

3 February 1863: Major-General Darius Nash Couch assumed command of II Corps Potomac, succeeding Major-General Oliver Otis Howard.

5 February 1863: II Corps Potomac transferred from the Right Grand Division of the Army of the Potomac to the Army of the Potomac.

5 February 1863: Major-General Darius Nash Couch retained command of II Corps Potomac.

22 May 1863: Major-General Winfield Scott Hancock assumed command of II Corps Potomac, succeeding Major-General Darius Nash Couch.

1 July 1863: Brigadier-General John Gibbon assumed temporary command of II Corps Potomac, succeeding Major-General Winfield Scott Hancock.

2 July 1863: Major-General Winfield Scott Hancock assumed command of II Corps Potomac, succeeding Brigadier-General John Gibbon.

3 July 1863: Brigadier-General William Hays assumed temporary command of II Corps Potomac, succeeding Major-General Winfield Scott Hancock.

16 August 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps Potomac, succeeding Brigadier-General William Hays.

26 August 1863: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

2 September 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps Potomac, succeeding Brigadier-General John Curtis Caldwell.

10 October 1863: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

12 October 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps Potomac, succeeding Brigadier-General John Curtis Caldwell.

16 December 1863: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

29 December 1863: Major-General Gouverneur Kemble Warren assumed command of II Corps Potomac, succeeding Brigadier-General John Curtis Caldwell.

9 January 1864: Brigadier-General John Curtis Caldwell assumed temporary command of II Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

13 January 1864: Major-General Gouverneur Kemble Warren assumed command of II Corps Potomac, succeeding Brigadier-General John Curtis Caldwell.

24 March 1864: III Corps Potomac was discontinued, and its forces allocated to II Corps Potomac and VI Corps Potomac.

24 March 1864: Major-General Winfield Scott Hancock assumed command of II Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

18 June 1864: Brigadier-General David Bell Birney assumed temporary command of II Corps Potomac, succeeding Major-General Winfield Scott Hancock.

27 June 1864: Major-General Winfield Scott Hancock assumed command of II Corps Potomac, succeeding Major-General David Bell Birney.

26 November 1864: Major-General Andrew Atkinson Humphreys assumed command of II Corps Potomac, succeeding Major-General Winfield Scott Hancock.

15 February 1865: Major-General Gershom Mott assumed temporary command of II Corps Potomac, succeeding Brigadier-General Andrew Atkinson Humphreys.

17 February 1865: Brigadier-General Nelson Appleton Miles assumed temporary command of II Corps Potomac, succeeding Brigadier-General Gershom Mott.

25 February 1865: Major-General Andrew Atkinson Humphreys assumed command of II Corps Potomac, succeeding Brigadier-General Nelson Appleton Miles.

19 April 1865: Brigadier-General Francis Channing Barlow assumed temporary command of II Corps Potomac, succeeding Major-General Andrew Atkinson Humphreys.

5 May 1865: Major-General Andrew Atkinson Humphreys assumed command of II Corps Potomac, succeeding Brigadier-General Francis Channing Barlow.

9 June 1865: Major-General Gershom Mott assumed temporary command of II Corps Potomac, succeeding Major-General Andrew Atkinson Humphreys.

20 June 1865: Major-General Andrew Atkinson Humphreys assumed command of II Corps Potomac, succeeding Major-General Gershom Mott.

28 June 1865: II Corps Potomac was discontinued.

II Corps Virginia

26 June 1862 12 September 1862

Nathaniel Prentiss Banks 26 June 1862-3 September 1862

Alpheus Starkey Williams temporary 4 September 1862-12 September 1862

26 June 1862: II Corps Virginia was established, comprising the field forces formerly in the Department of the Shenandoah.

26 June 1862: Major-General Nathaniel Prentiss Banks assumed command II Corps Virginia.

2 September 1862: Major-General Nathaniel Prentiss Banks retained command of II Corps Virginia.

4 September 1862: Brigadier-General Alpheus Starkey Williams assumed temporary command of II Corps Virginia, succeeding Major-General Nathaniel Prentiss Banks.

12 September 1862: II Corps Virginia was discontinued, and incorporated into XII Corps Potomac.

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.

III Corps Potomac

3 March 1862-24 March 1864

Samuel Peter Heintzelman 3 March 1862-19 October 1862

George Stoneman 20 October 1862-5 February 1863

Daniel Edgar Sickles 5 February 1863-29 May 1863

David Bell Birney temporary 29 May 1863-3 June 1863

Daniel Edgar Sickles 3 June 1863-2 July 1863

David Bell Birney temporary 2 July 1863-7 July 1863

William Henry French 7 July 1863-28 January 1864

David Bell Birney temporary 28 January 1864-17 February 1864

William Henry French 17 February 1864-24 March 1864

3 March 1862: III Corps Potomac was established in the Army of the Potomac.

3 March 1862: Brigadier-General Samuel Peter Heintzelman assumed command of III Corps Potomac.

20 October 1862: Brigadier-General George Stoneman assumed command of III Corps Potomac, succeeding Major-General Samuel Peter Heintzelman.

14 November 1862: III Corps Potomac transferred to the Centre Grand Division of the Army of the Potomac.

14 November 1862: Major-General George Stoneman retained command of III Corps Potomac.

5 February 1863: III Corps Potomac transferred from the Centre Grand Division Potomac to the Army of the Potomac.

5 February 1863: Major-General Daniel Edgar Sickles assumed command of III Corps Potomac.

29 May 1863:Major-General David Bell Birney assumed temporary command of III Corps Potomac, succeeding Major-General Daniel Edgar Sickles.

3 June 1863: Major-General Daniel Edgar Sickles assumed command of III Corps Potomac, succeeding Major-General David Bell Birney.

2 July 1863: Brigadier-General David Bell Birney assumed temporary command of III Corps Potomac, succeeding Major-General Daniel Edgar Sickles.

7 July 1863: Major-General William Henry French assumed command of III Corps Potomac, succeeding Major-General David Bell Birney.

28 January 1864: Brigadier-General David Bell Birney assumed temporary command of III Corps Potomac, succeeding Major-General William Henry French.

17 February 1864: Major-General William Henry French assumed command of III Corps Potomac, succeeding Major-General David Bell Birney.

24 March 1864: III Corps Potomac was discontinued, and its forces allocated to II Corps Potomac and VI Corps Potomac.

III Corps Virginia

26 June 1862-12 September 1862

Irvin McDowell 26 June 1862-4 September 1862

James Brewerton Ricketts temporary 5 September 1862

Joseph Hooker 6 September 1862-12 September 1862,

26 June 1862: III Corps Virginia was established., comprising the field forces formerly in the Department of the Rappahannock.

26 June 1862: Major-General Irvin McDowell assumed command III Corps Virginia.

2 September 1862: Major-General Irvin McDowell retained command of I Corps Virginia.

5 September 1862: Brigadier-General James Brewerton Ricketts assumed temporary command of III Corps Virginia, succeeding Major-General Irvin McDowell.

6 September 1862: Major-General Joseph Hooker assumed command of III Corps Virginia, succeeding Brigadier-General James Brewerton Ricketts.

12 September 1862: III Corps Virginia was discontinued, and incorporated into I Corps Potomac.

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.

IV Corps Potomac

3 March 1862-16 August 1862

Erasmus Darwin Keyes 3 March 1862-16 August 1862

3 March 1862: IV Corps Potomac was established in the Army of the Potomac.

3 March 1862: Brigadier-General Erasmus Darwin Keyes assumed command of IV Corps Potomac.

16 August 1862: IV Corps Potomac transferred from the Army of the Potomac to the Department of Virginia.

IV Corps Virginia

16 August 1862-15 July 1863

Erasmus Darwin Keyes 16 August 1862-15 July 1863

16 August 1862: IV Corps Potomac transferred from the Army of the Potomac to the Department of Virginia.

16 August 1862: Major-General Erasmus Darwin Keyes retained command of IV Corps Virginia.

15 July 1863: IV Corps Virginia transferred from the Department of Virginia to the Department of Virginia and North Carolina.

IV Corps Virginia and North Carolina

15 July 1863-1 August 1863

Erasmus Darwin Keyes 15 July 1863-1August 1863

15 July 1863: IV Corps Virginia transferred from the Department of Virginia to the Department of Virginia and North Carolina.

15 July 1863: Major-General Erasmus Darwin Keyes retained command of IV Corps Virginia and North Carolina.

1 August 1863: IV Corps Virginia and North Carolina was discontinued, and its forces assigned to XVIII Corps Virginia and North Carolina.

V Corps Potomac #1

3 March 1862-4 April 1862

Nathaniel Prentiss Banks 3 March 1862-4 April 1862

3 March 1862: V Corps Potomac was established in the Army of the Potomac.

3 March 1862: Major-General Nathaniel Prentiss Banks assumed command of V Corps Potomac.

4 April 1862: V Corps Potomac was discontinued, and its forces incorporated into the Department of the Shenandoah.

V Corps Potomac #2

18 May 1862-28 June 1865

Fitz-John Porter 18 May 1862-9 November 1862

Joseph Hooker 10 November 1862-15 November 1862

Daniel Butterfield 16 November 1862-23 December 1862

George Gordon Meade 24 December 1862-25 January 1863

Charles Griffin temporary 26 January 1863-31 January 1863

George Sykes 1 February 1863-5 February 1863

George Gordon Meade 5 February 1863-16 February 1863

George Sykes temporary 16 February 1863-23 February 1863

Andrew Atkinson Humphreys temporary 23 February 1863-28 February 1863

George Gordon Meade 28 February 1863-28 June 1863

George Sykes 28 June 1863-7 October 1863

Samuel Wylie Crawford temporary 7 October 1863-15 October 1863

George Sykes 15 October 1863-24 March 1864

Gouverneur Kemble Warren 24 March 1864-2 January 1865

Samuel Wylie Crawford temporary 2 January 1865-27 January 1865

Gouverneur Kemble Warren 27 January 1865-1 April 1865

Charles Griffin temporary 1 April 1865-19 April 1865, 19 April 1865-28 June 1865

18 May 1862: Provisional V Corps Potomac was established in the Army of the Potomac.

18 May 1862: Brigadier-General Fitz-John Porter assumed command of V Corps Potomac.

22 July 1862: V Provisional Corps Potomac was confirmed as V Corps Potomac.

22 July 1862: Major-General Fitz-John Porter retained command V Corps Potomac.

10 November 1862: Major-General Joseph Hooker assumed command of V Corps Potomac, succeeding Major-General Fitz John Porter.

14 November 1862: V Corps Potomac transferred to the Centre Grand Division of the Army of the Potomac.

14 November 1862: Major-General Joseph Hooker retained command of V Corps Potomac.

16 November 1862: Brigadier-General Daniel Butterfield assumed command of V Corps Potomac, succeeding Major-General Joseph Hooker.

24 December 1862: Major-General George Gordon Meade assumed command of V Corps Potomac, succeeding Major-General Daniel Butterfield.

26 January 1863: Brigadier-General Charles Griffin assumed temporary command of V Corps Potomac, succeeding Major-General George Gordon Meade.

1 February 1863: Major-General George Sykes assumed temporary command of V Corps Army of the Potomac, succeeding Brigadier-General Charles Griffin.

5 February 1863: V Corps Potomac transferred from the Centre Grand Division Potomac to the Army of the Potomac.

5 February 1863: Major-General George Gordon Meade assumed command of V Corps Potomac, succeeding Major-General George Sykes.

16 February 1863: Major-General George Sykes assumed temporary command of V Corps Potomac, succeeding Major-General George Gordon Meade

23 February 1863: Brigadier-General Andrew Atkinson Humphreys assumed temporary command of V Corps Potomac, succeeding Major-General George Sykes.

28 February 1863: Major-General George Gordon Meade assumed command of V Corps Potomac, succeeding Brigadier-General Andrew Atkinson Humphreys.

28 June 1863: Major-General George Sykes assumed command of V Corps Potomac, succeeding Major-General George Gordon Meade.

7 October 1863: Brigadier-General Samuel Wylie Crawford assumed temporary command of V Corps Potomac, succeeding Major-General George Sykes.

15 October 1863: Major-General George Sykes assumed command of V Corps Potomac, succeeding Brigadier-General Samuel Wylie Crawford.

24 March 1864: I Corps Potomac was discontinued, and its forces allocated to V Corps Potomac.

24 March 1864: Major-General Gouverneur Kemble Warren assumed command of V Corps Potomac, succeeding Major-General George Sykes.

2 January 1865: Brigadier-General Samuel Wylie Crawford assumed temporary command of V Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

27 January 1865: Major-General Gouverneur Kemble Warren assumed command of V Corps Potomac, succeeding Brigadier-General Samuel Wylie Crawford.

1 April 1865: Brigadier-General Charles Griffin assumed command of V Corps Potomac, succeeding Major-General Gouverneur Kemble Warren.

28 June 1865: V Corps Potomac was discontinued.

VI Corps Potomac #1

18 May 1862-7 August 1864

William Buel Franklin 18 May 1862-15 November 1862

William Farrar Smith 16 November 1862-24 January 1863

John Newton 2 January 1863-3 February 1863

John Sedgwick 4 February 1863-6 April 1864

James Brewerton Ricketts temporary 6 April 1864-13 April 1864

John Sedgwick 13 April 1864-9 May 1864

Horatio Gouverneur Wright 9 May 1864-7 August 1864

18 May 1862: Provisional VI Corps Potomac was established in the Army of the Potomac.

18 May 1862: Brigadier-General William Buel Franklin assumed command of VI Corps Potomac.

22 July 1862: VI Provisional Corps Potomac was confirmed as VI Corps Potomac.

22 July 1862: Major-General William Buel Franklin retained command of VI Corps Potomac.

14 November 1862: VI Corps Potomac transferred to the Left Grand Division of the Army of the Potomac.

14 November 1862: Major-General William Buel Franklin retained command of VI Corps Potomac.

16 November 1862: Major-General William Farrar Smith assumed command of VI Corps Potomac, succeeding Major-General William Buel Franklin.

25 January 1863: Brigadier-General John Newton assumed command of VI Corps Potomac, succeeding Major-General William Farrar Smith.

4 February 1863: Major-General John Sedgwick assumed command VI Corps Potomac, succeeding Brigadier-General John Newton.

5 February 1863: VI Corps Potomac transferred from Left Grand Division Potomac to the Army of the Potomac.

5 February 1863:  Major-General John Sedgwick retained command of VI Corps Potomac.

24 March 1864: III Corps Potomac was discontinued, and its forces allocated to II Corps Potomac and VI Corps Potomac.

6 April 1864: Brigadier-General James Brewerton Ricketts assumed temporary command of VI Corps Potomac, succeeding Major-General John Sedgwick.

13 April 1864: Major-General John Sedgwick assumed command of VI Corps Potomac, succeeding Brigadier-General James Brewerton Ricketts.

9 May 1864: Brigadier-General Horatio Gouverneur Wright assumed command of VI Corps Potomac, succeeding Major-General John Sedgwick.

7 August 1864: VI Corps Potomac transferred from the Army of the Potomac to the Army of the Shenandoah.

VI Corps Potomac #2

6 December 1864-28 June 1865

Horatio Gouverneur Wright 6 December 1864-16 January 1865

George Washington Getty temporary 16 January 1865-11 February 1865

Horatio Gouverneur Wright 11 February 1865-28 June 1865

6 December 1864: VI Corps Shenandoah transferred from the Army of the Shenandoah to the Army of the Potomac.

6 December 1864: Major-General Horatio Gouverneur Wright retained command of VI Corps Potomac.

16 January 1865: Brigadier-General George Washington Getty assumed temporary command of VI Corps Potomac, succeeding Major-General Horatio Gouverneur Wright.

11 February 1865: Major-General Horatio Gouverneur Wright assumed command of VI Corps Potomac, succeeding Brigadier-General George Washington Getty.

28 June 1865: VI Corps Potomac was discontinued.

VI Corps Shenandoah

7 August 1864-6 December 1864

Horatio Gouverneur Wright 7 August 1864-16 October 1864

James Brewerton Ricketts temporary 16 October 1864-19 October 1864

George Washington Getty interim 19 October 1864

Horatio Gouverneur Wright 19 October 1864-6 December 1864

7 August 1864: VI Corps Potomac transferred from the Army of the Potomac to the Army of the Shenandoah.

7 August 1864: Major-General Horatio Gouverneur Wright retained command of VI Corps Shenandoah.

16 October 1864: Brigadier-General James Brewerton Ricketts assumed temporary command of VI Corps Shenandoah, succeeding Major-General Horatio Gouverneur Wright.

19 October 1864: Brigadier-General George Washington Getty assumed interim command of VI Corps Shenandoah, succeeding Brigadier-General James Brewerton Ricketts.

19 October 1864: Major-General Horatio Gouverneur Wright assumed command of VI Corps Shenandoah, succeeding Brigadier-General George Washington Getty.

6 December 1864: VI Corps Shenandoah transferred from the Army of the Shenandoah to the Army of the Potomac.

VII Corps Arkansas

6 January 1864-1 August 1865

Frederick Steele 6 January 1864-21 March 1864

Nathan Kimball temporary 22 March 1864-21 May 1864

Frederick Steele 22 May 1864-21 December 1864

Joseph Jones Reynolds 22 December 1864-1 August 1865

6 January 1864: VII Corps Arkansas was established in the Army of Arkansas.

6 January 1864: Major-General Frederick Steele assumed command of VII Corps Arkansas.

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

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

22 December 1864: Major-General Joseph Jones Reynolds assumed command of VII Corps Arkansas, succeeding Major-General Frederick Steele.

1 August 1865: VII Corps Arkansas was discontinued.

VIII Corps Atlantic

27 June 1865-1 August 1865

Lewis Wallace 27 June 1865-1 August 1865

27 June 1865: VIII Corps Middle transferred from the Middle Military Division to the Military Division of the Atlantic.

27 June 1865: Major-General Lewis Wallace retained command of VIII Corps Atlantic.

1 August 1865: VIII Corps Atlantic was discontinued.

VIII Corps Middle

12 July 1862-27 June 1865

John Ellis Wool 12 July 1862-22 December 1862

Robert Cumming Schenck 22 December 1862-12 March 1863

William Walton Morris temporary 12 March 1863-20 March 1863

Robert Cumming Schenck 20 March 1863-10 August 1863

William Walton Morris temporary 10 August 1863-31 August 1863

Robert Cumming Schenck 31 August 1863-22 September 1863

William Walton Morris temporary 22 September 1863-28 September 1863

Erastus Barnard Tyler temporary 28 September 1863-10 October 1863

Robert Cumming Schenck 10 October 1863-5 December 1863

Henry Hayes Lockwood 5 December 1863-12 March 1864 interim 22 March 1864

Lewis Wallace 12 March 1864-1 February 1865

William Walton Morris temporary 1 February 1865-19 April 1865

Lewis Wallace 19 April 1865-27 June 1865

12 July 1862: VIII Corps Middle was established in the Middle Department.

12 July 1862: Major-General John Ellis Wool assumed command of VIII Corps Middle.

22 December 1862: Major-General Robert Cumming Schenck assumed command of VIII Corps Middle, succeeding Major-General John Ellis Wool.

12 March 1863: Colonel William Walton Morris assumed temporary command of VIII Corps Middle, succeeding Major-General Robert Cumming Schenck.

20 March 1863: Brigadier-General Robert Cumming Schenck assumed command of VIII Corps, succeeding Colonel William Walton Morris.

10 August 1863: Colonel William Walton Morris assumed temporary command of VIII Corps Middle, succeeding Major-General Robert Cumming Schenck.

31 August 1863: Major-General Robert Cumming Schenck assumed command of VIII Corps Middle, succeeding Colonel William Walton Morris.

22 September 1863: Colonel William Walton Morris assumed temporary command of VIII Corps Middle, succeeding Brigadier-General Robert Cummings Schenck.

28 September 1863: Brigadier-General Erastus Barnard Tyler assumed temporary command VIII Corps Middle, succeeding Colonel William Walton Morris.

10 October 1863: Brigadier-General Robert Cumming Schenck assumed command of VIII Corps Middle, succeeding Brigadier-General Erastus Barnard Tyler.

5 December 1863: Brigadier-General Henry Hayes Lockwood assumed command of VIII Corps Middle, succeeding Major-General Robert Cumming Schenck.

12 March 1864: Major-General Lewis Wallace was appointed to command VIII Corps Middle, arriving on March 22 1864, to succeed Brigadier-General Henry Hayes Lockwood.

22 March 1864: Major-General Lewis Wallace arrived to command VIII Corps Middle, succeeding Brigadier-General Henry Hayes Lockwood.

1 February 1865: Colonel William Walton Morris assumed temporary command of VIII Corps Middle, succeeding Major-General Lewis Wallace.

19 April 1865: Major-General Lewis Wallace assumed command of VIII Corps Middle, succeeding Colonel William Walton Morris.

17 May 1865: VIII Corps Middle transferred from the Middle Department to the direct command of the Middle Military Division.

17 May 1865: Major-General Lewis Wallace retained command of VIII Corps Middle.

27 June 1865: VIII Corps Middle transferred from the Middle Military Division to the Military Division of the Atlantic.

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 Potomac #1

22 July 1862-3 August 1862

Ambrose Everett Burnside 22 July 1862-3 August 1862

22 July 1862: IX Corps Potomac was established in the Army of the Potomac, comprising forces that had participated in the Expedition to North Carolina.

22 July 1862: Major-General Ambrose Everett Burnside assumed command of IX Corps Potomac.

3 August 1862: IX Corps transferred from the Army of the Potomac to the Department of Virginia.

IX Corps Potomac #2

3 September 1862-5 February 1863

Jesse Lee Reno 3 September 1862-13 September 1862

Jacob Dolson Cox temporary 14 September 1862-7 October 1862

Orlando Bolivar Willcox 8 October 1862-16 January 1863

John Sedgwick 16 January 1863-5 February 1863

3 September 1862: IX Corps Virginia transferred from the Department of Virginia to the Army of the Potomac.

3 September 1862: Major-General Jesse Lee Reno assumed command of IX Corps Potomac, succeeding Major-General Ambrose Everett Burnside.

14 September 1862: Brigadier-General Jacob Dolson Cox assumed temporary command of IX Corps Potomac, succeeding Major-General Jesse Lee Reno.

8 October 1862: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Potomac, succeeding Major-General Jacob Dolson Cox.

14 November 1862: IX Corps Potomac transferred to the Right Grand Division of the Army of the Potomac.

14 November 1862: Brigadier-General Orlando Bolivar Willcox retained temporary command of IX Corps Potomac.

16 January 1863: Major-General John Sedgwick assumed command of IX Corps Potomac, succeeding Brigadier-General Orlando Bolivar Willcox.

5 February 1863: IX Corps Potomac transferred from the Right Grand Division of the Army of the Potomac to the Department of Virginia.

IX Corps Potomac #3

13 April 1864-24 April 1865

Ambrose Everett Burnside 13 April 1864-14 August 1864

John Grubb Parke temporary 14 August 1864-22 August 1864, 22 August 1864-1 September 1864

Orlando Bolivar Willcox temporary 1 September 1864-9 September 1864

John Grubb Parke 9 September 1864-31 December 1864

Orlando Bolivar Willcox temporary 31 December 1864-12 January 1865

John Grubb Parke 12 January 1865-24 January 1865

Orlando Bolivar Willcox temporary 24 January 1865-2 February 1865

John Grubb Parke 2 February 1865-24 April 1865

13 April 1864: IX Corps transferred from the Army of the Ohio to the Department of the Potomac.

13 April 1864: Major-General Ambrose Everett Burnside assumed command of IX Corps Potomac, succeeding Major-General John Grubb Parke.

24 May 1864: IX Corps transferred from the Department of the Potomac to the Army of the Potomac.

24 May 1864: Major-General Ambrose Everett Burnside retained command of IX Corps Potomac.

14 August 1864: Major-General John Grubb Parke assumed temporary command of IX Corps Potomac, succeeding Major-General Ambrose Everett Burnside.

22 August 1864: Major-General John Grubb Parke assumed full command of IX Corps Potomac.

1 September 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Potomac, succeeding Major-General John Grubb Parke.

9 September 1864: Major-General John Grubb Parke assumed command of IX Corps Potomac, succeeding Brigadier-General Orlando Bolivar Willcox.

31 December 1864: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Potomac, succeeding Major-General John Grubb Parke.

12 January 1865: Major-General John Grubb Parke assumed command of IX Corps Potomac, succeeding Brigadier-General Orlando Bolivar Willcox.

24 January 1865: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Potomac, succeeding Major-General John Grubb Parke.

2 February 1865: Major-General John Grubb Parke assumed command of IX Corps Potomac, succeeding Brigadier-General Orlando Bolivar Willcox.

24 April 1865: IX Corps Potomac transferred from the Army of the Potomac to the Department of Washington.

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.

IX Corps Virginia #1

3 August 1862-3 September 1862

Ambrose Everett Burnside 3 August 1862-3 September 1862

3 August 1862: IX Corps transferred from the Army of the Potomac to the Department of Virginia.

3 August 1862: Major-General Ambrose Everett Burnside retained command of IX Corps Virginia.

3 September 1862: IX Corps Virginia transferred from the Department of Virginia to the Army of the Potomac.

IX Corps Virginia #2

5 February 1863-17 March 1863

William Farrar Smith 5 February 1863-7 March 1863

Orlando Bolivar Willcox temporary 8 March 1863-17 March 1863

5 February 1863: IX Corps Potomac transferred from the Right Grand Division of the Army of the Potomac to the Department of Virginia.

5 February 1863: Major-General William Farrar Smith assumed command of IX Corps Virginia.

8 March 1863: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Virginia, succeeding Brigadier-General William Farrar Smith.

17 March 1863: IX Corps transferred from the Department of Virginia to the Department of the Ohio.

IX Corps Washington

24 April 1865-27 July 1865

John Grubb Parke 24 April 1865-7 June 1865

Orlando Bolivar Willcox temporary 7 June 1865-26 June 1865

John Grubb Parke 26 June 1865-27 July 1865

24 April 1865: IX Corps Potomac transferred from the Army of the Potomac to the Department of Washington.

24 April 1865: Major-General John Grubb Parke retained command of IX Corps Washington.

7 June 1865: Brigadier-General Orlando Bolivar Willcox assumed temporary command of IX Corps Washington, succeeding Major-General John Grubb Parke.

26 June 1865: Major-General John Grubb Parke assumed command of IX Corps Washington, succeeding Brigadier-General Orlando Bolivar Willcox.

27 July 1865: IX Corps Washington was discontinued.

X Corps James

28 April 1864-3 December 1864

Alfred Howe Terry temporary 28 April 1864-3 May 1864

Quincy Adam Gillmore 4 May 1864-13 June 1864

Alfred Howe Terry temporary 14 June 1864-20 June 1864

William Thomas Harbaugh Brooks temporary 21 June 1864-13 July 1864

Alfred Howe Terry temporary 14 July 1864-20 July 1864

Edward Otho Cresap Ord 21 July 1864-22 July 1864

David Bell Birney 23 July 1864-9 October 1864

Alfred Howe Terry 10 October 1864-3 November 1864

Adelbert Ames temporary 4 November 1864-17 November 1864

Alfred Howe Terry 18 November 1864-3 December 1864

28 April 1864: X Corps South transferred from the Department of the South to the Army of the James.

28 April 1864: Brigadier-General Alfred Howe Terry assumed temporary command of X Corps James, succeeding Major-General Quincy Adams Gillmore.

4 May 1864: Major-General Quincy Adams Gillmore assumed command of X Corps James, succeeding Brigadier-General Alfred Howe Terry.

14 June 1864: Brigadier-General Alfred Howe Terry assumed temporary command of X Corps James, succeeding Major-General Quincy Adams Gillmore.

21 June 1864: Brigadier-General William Thomas Harbaugh Brooks assumed temporary command of X Corps James, succeeding Brigadier-General Alfred Howe Terry.

14 July 1864: Brigadier-General Alfred Howe Terry assumed temporary command of X Corps James, succeeding Brigadier-General William Thomas Harbaugh Brooks.

21 July 1864: Major-General Edward Otho Cresap Ord assumed command of X Corps James, succeeding Brigadier-General Alfred Howe Terry.

23 July 1864: Major-General David Bell Birney assumed command of X Corps James, succeeding Major-General Edward Otho Cresap Ord.

10 October 1864: Major-General Alfred Howe Terry assumed command of X Corps James, succeeding Major-General David Bell Birney.

4 November 1864: Brigadier-General Adelbert Ames assumed temporary command of X Corps James, succeeding Major-General Alfred Howe Terry.

18 November 1864: Major-General Alfred Howe Terry assumed command of X Corps James, succeeding Brigadier-General Adelbert Ames.

3 December 1864: XXV Corps was established in the Army of the James by consolidating the black divisions of X Corps James and XVIII Corps James.

3 December 1864: X Corps James was discontinued.

X Corps North Carolina

23 March 1865-1 August 1865

Alfred Howe Terry 23 March 1865-13 May 1865

Adelbert Ames 13 May 1865-1 August 1865

23 March 1865: X Corps was established in the Department of North Carolina, comprising forces previously in Terry’s Provisional Corps North Carolina.

23 March 1865: Major-General Alfred Howe Terry retained command of X Corps North Carolina.

13 May 1865: Brigadier-General Adelbert Ames assumed command of X Corps North Carolina, succeeding Major-General Alfred Howe Terry.

1 August 1865: X Corps North Carolina was discontinued.

X Corps South

3 September 1862-28 April 1864

John Milton Brannan 3 September 1862-16 September 1862

Ormsby McKnight Mitchel 17 September 1862-26 October 1862

John Milton Brannan temporary 27 October 1862-19 January 1863

David Hunter 20 January 1863-11 June 1863

Quincy Adams Gillmore 12 June 1863-28 April 1864

3 September 1862: X Corps South was established in the Department of the South.

3 September 1862: Brigadier-General John Milton Brannan assumed command of X Corps South.

17 September 1862: Major-General Ormsby McKnight Mitchel assumed command of X Corps South, succeeding Brigadier-John Milton Brannan.

27 October 1862: Brigadier-General John Milton Brannan assumed temporary command of the X Corps South, succeeding Major-General Ormsby McKnight Mitchel.

20 January 1863: Major-General David Hunter assumed command of the X Corps South, succeeding Brigadier-General John Milton Brannan.

12 June 1863: Brigadier-General Quincy Adams Gillmore assumed command of X Corps South, succeeding Major-General David Hunter.

28 April 1864: X Corps South transferred from the Department of the South to the Army of the James.

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.

XI Corps Potomac

12 September 1862-25 September 1863

Franz Sigel 12 September 1862-9 January 1863

Julius Stahel temporary 10 January 1863-18 January 1863

Carl Schurz temporary 19 January 1863-5 February 1863

Franz Sigel 5 February 1863-22 February 1863

Adolph Wilhelm August Frederick von Steinwehr temporary 22 February 1863-5 March 1863

Carl Schurz temporary 5 March 1863-2 April 1863

Oliver Otis Howard 2 April 1863-1 July 1863

Carl Schurz temporary 1 July 1863

Oliver Otis Howard 1 July 1863-25 September 1863

12 September 1862: XI Corps was established in the Army of the Potomac, comprising the forces of the discontinued I Corps Virginia.

12 September 1862: Major-General Franz Sigel assumed command of XI Corps Potomac.

14 November 1862: XI Corps Potomac transferred to the Reserve Grand Division of the Army of the Potomac.

14 November 1862: Major-General Franz Sigel retained command of XI Corps Potomac.

10 January 1863:Brigadier-General Julius Stahel assumed temporary command of XI Corps Potomac, succeeding Major-General Franz Sigel.

19 January 1863: Major-General Carl Schurz assumed temporary command of XI Corps Potomac, succeeding Brigadier-General Julius Stahel

5 February 1863: XI Corps Potomac transferred from the Reserve Grand Division of the Army of the Potomac to the Army of the Potomac.

5 February 1863: Major-General Franz Sigel assumed command of XI Corps Potomac, succeeding Major-General Carl Schurz.

22 February 1863: Brigadier-General Adolph Wilhelm August Frederick von Steinwehr assumed temporary command of XI Corps Potomac, succeeding Major-General Franz Sigel.

5 March 1863: Brigadier-General Carl Schurz assumed temporary command of XI Corps Potomac, succeeding Brigadier-General Adolph Wilhelm August Frederick von Steinwehr.

2 April 1863: Major-General Oliver Otis Howard assumed command of XI Corps Potomac, succeeding Major-General Carl Schurz.

1 July 1863: Brigadier-General Carl Schurz assumed temporary command of XI Corps Potomac, succeeding Major-General Oliver Otis Howard.

1 July 1863: Major-General Oliver Otis Howard assumed command of XI Corps Potomac, succeeding Major-General Carl Schurz.

25 September 1863: XI Corps Potomac transferred from the Army of the Potomac to Hooker’s Command 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.

XII Corps Potomac

12 September 1862-25 September 1863

Alpheus Starkey Williams temporary 4 September 1862-12 September 1862

Joseph King Fenno Mansfield 15 September 1862-17 September 1862

Alpheus Starkey Williams temporary 17 September 1862-19 October 1862

Henry Warner Slocum 20 October 1862-1 July 1863

Alpheus Starkey Williams temporary 1 July 1863-4 July 1863

Henry Warner Slocum 4 July 1863-31 August 1863

Alpheus Starkey Williams temporary 31 August 1863-13 September 1863

Henry Warner Slocum 13 September 1863-25 September 1863

12 September 1862: XII Corps was established in the Army of the Potomac, comprising the forces of the discontinued II Corps Virginia.

12 September 1862: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps Potomac.

15 September 1862: Major-General Joseph King Fenno Mansfield assumed command of XII Corps Potomac, succeeding Brigadier-General Alpheus Starkey Williams.

17 September 1862: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps Potomac, succeeding Major-General Joseph King Fenno Mansfield.

20 October 1862: Major-General Henry Warner Slocum assumed command of XII Corps Potomac, succeeding Brigadier-General Alpheus Starkey Williams.

14 November 1862: XII Corps Potomac transferred to the Reserve Grand Division of the Army of the Potomac.

14 November 1862: Major-General Henry Warner Slocum retained command of XIII Corps Potomac.

5 February 1863: XII Corps Potomac transferred from the Reserve Grand Division of the Army of the Potomac to the Army of the Potomac.

5 February 1863: Major-General Henry Warner Slocum retained command of XII Corps Potomac.

1 July 1863: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps Potomac, succeeding Major-General Henry Warner Slocum.

4 July 1863: Major-General Henry Warner Slocum assumed command of XII Corps Potomac, succeeding Brigadier-General Alpheus Starkey Williams.

31 August 1863: Brigadier-General Alpheus Starkey Williams assumed temporary command of XII Corps Potomac, succeeding Major-General Henry Warner Slocum.

13 September 1863: Major-General Henry Warner Slocum assumed command of XII Corps Potomac, succeeding Brigadier-General Alpheus Starkey Williams.

25 September 1863: XII Corps Potomac transferred from the Army of the Potomac to Hooker’s Command Cumberland.

XIII Corps Gulf #1

7 August 1863-7 May 1864

Cadwallader Colden Washburn 7 August 1863-14 September 1863

Edward Otho Cresap Ord 15 September 1863-18 October 1863

Cadwallader Colden Washburn 19 October 1863-24 October 1863

Napoleon Jackson Tecumseh Dana 25 October 1863

Cadwallader Colden Washburn temporary 26 October 1863-8 January 1864

Edward Otho Cresap Ord 9 January 1864-20 February 1864

John Alexander McClernand 20 February 1864-14 March 1864

Thomas Edward Greenfield Ransom 15 March 1864-7 April 1864

Robert Alexander Cameron 8 April 1864-26 April 1864

Michael Kelly Lawler 27 April 1864-9 May 1864

William Plummer Benton 9 May 1864-11 June 1864

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

7 August 1863: Major-General Cadwalader Colden Washburn retained command of XIII Corps Gulf.

15 September 1863: Major-General Edward Otho Cresap Ord assumed command of XIII Corps Gulf, succeeding Brigadier-General Cadwallader Colden Washburn.

19 October 1863: Major-General Cadwallader Colden Washburn assumed command of XIII Corps Gulf, succeeding Major-General Edward Otho Cresap Ord.

25 October 1863: Major-General Napoleon Jackson Tecumseh Dana assumed command of XIII Corps Gulf, succeeding Brigadier-General Cadwallader Colden Washburn.

26 October 1863: Major-General Cadwallader Colden Washburn assumed temporary command of XIII Corps Gulf, succeeding Major-General Napoleon Jackson Tecumseh Dana.

9 January 1864: Major-General Edward Otho Cresap Ord assumed command of XIII Corps Gulf, succeeding Brigadier-General Cadwallader Colden Washburn.

20 February 1864: Major-General John Alexander McClernand assumed command of XIII Corps Gulf, succeeding Major-General Edward Otho Cresap Ord.

15 March 1864: Brigadier-General Thomas Edward Greenfield Ransom assumed command of XIII Corps Gulf, succeeding Major-General John Alexander McClernand.

8 April 1864: Brigadier-General Robert Alexander Cameron assumed command of XIII Corps Gulf, succeeding Brigadier-General Thomas Edward Greenfield Ransom.

27 April 1864: Brigadier-General Michael Kelly Lawler assumed command of XIII Corps Gulf, succeeding Brigadier-General Robert Alexander Cameron.

7 May 1864: Brigadier-General Michael Kelly Lawler assumed command of XIII Corps Gulf.

9 May 1864: Brigadier-General William Plummer Benton assumed command of XIII Corps Gulf, succeeding Brigadier-General Michael Kelly Lawler.

11 June 1864: XIII Corps (Gulf) was discontinued, and most its forces assigned later to form Reserve Corps (Gulf).

XIII Corps Gulf #2

18 February 1865-20 July 1865

Gordon Granger 18 February 1865-20 July 1865

18 February 1865: XIII Corps Gulf was re-established in the Army of the Gulf, composed largely of troops previously in Reserve Corps Gulf.

18 February 1865: Major-General Gordon Granger assumed command of XIII Corps Gulf.

27 June 1865: XIII Corps Gulf transferred from the Army of the Gulf to the Military Division of the Gulf.

27 June 1865: Major-General Gordon Granger retained command of XIII Corps Gulf.

20 July 1865: XIII Corps Gulf was discontinued.

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 Gulf

18 February 1865-20 July 1865

Andrew Jackson Smith 18 February 1865-20 July 1865

18 February 1865: The Detachment Army of the Tennessee was discontinued, and reverted to the name XVI Corps Gulf, and transferred to the Army of the Gulf.

18 February 1865: XVI Corps Gulf was established in the Army of the Gulf.

18 February 1865: Major-General Andrew Jackson Smith retained command of XVI Corps Gulf.

27 June 1865: XVI Corps Gulf transferred from the Army of the Gulf to the Military Division of the Gulf.

27 June 1865: Major-General Andrew Jackson Smith retained command of XVI Corps Gulf.

20 July 1865: XVI Corps Gulf 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)

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.

XVIII Corps James

2 May 1864-3 December 1864

William Farrar Smith 2 May 1864-9 July 1864

John Henry Martindale temporary 10 July 1864-20 July 1864

Edward Otho Cresap Ord 21 July 1864-3 September 1864

John Gibbon temporary 4 September 1864-21 September 1864

Edward Otho Cresap Ord 22 September 1864-28 September 1864

Charles Adam Heckman temporary 29 September 1864-30 September 1864

Godfrey Weitzel 1 October 1864-3 December 1864

2 May 1864: XVIII Corps transferred from the Department of Virginia and North Carolina to the Army of the James.

2 May 1864: William Farrar Smith assumed command of XVIII Corps James, succeeding Major-General Benjamin Franklin Butler.

10 July 1864: Brigadier-General John Henry Martindale assumed temporary command of XVIII Corps James, succeeding Major-General William Farrar Smith.

21 July 1864: Major-General Edward Otho Cresap Ord assumed command of XVIII Corps James, succeeding Brigadier-General John Henry Martindale.

4 September 1864: Major-General John Gibbon assumed temporary command of XVIII Corps James, succeeding Major-General Edward Otho Cresap Ord.

22 September 1864: Major-General Edward Otho Cresap Ord assumed command of XVIII Corps James, succeeding Major-General John Gibbon.

29 September 1864: Brigadier-General Charles Adam Heckman assumed temporary command of XVIII Corps James, succeeding Major-General Edward Otho Cresap Ord.

1 October 1864: Brigadier-General Godfrey Weitzel assumed command of XVIII Corps James, succeeding Brigadier-Charles Adam Pleasant Heckman.

3 December 1864: XXV Corps was established in the Army of the James by consolidating the black divisions of X Corps and XVIII Corps.

3 December 1864: XVIII Corps James was discontinued.

XVIII Corps North Carolina #1

24 December 1862-15 July 1863

John Gray Foster 24 December 1862-15 July 1863

24 December 1862: XVIII Corps North Carolina was established in the Department of North Carolina, comprising forces that had taken part in the expeditions to Roanoke Island and New Bern and the garrisons of New Bern, Plymouth, and Beaufort.

24 December 1862: Major-General John Gray Foster assumed of command XVIII Corps North Carolina.

15 July 1863: XVIII Corps North Carolina transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

XVIII Corps North Carolina #2

16 August 1863-25 April 1864

John Gray Foster 16 August 1863-10 November 1863

Benjamin Franklin Butler 11 November 1863-25 April 1864

16 August 1863: XVIII Corps Virginia and North Carolina transferred from the Department of Virginia and North Carolina to the Army of North Carolina.

16 August 1863: Major-General John Gray Foster assumed command of XVIII Corps North Carolina succeeding Major-General John James Peck.

11 November 1863: Major-General Benjamin Franklin Butler assumed command of XVIII Corps North Carolina, succeeding Major-General John Gray Foster.

25 April 1864: XVIII Corps North Carolina transferred from the discontinued Army of North Carolina to the Department of Virginia and North Carolina.

XVIII Corps Virginia and North Carolina #1

15 July 1863-16 August 1863

John Gray Foster 15 July 1863-18 July 1863

Innis Newton Palmer temporary 18 July 1863-13 August 1863

John James Peck 14 August 1863-16 August 1863

15 July 1863: XVIII Corps North Carolina transferred from the Department of North Carolina to the Department of Virginia and North Carolina.

15 July 1863: Major-General John Gray Foster retained command of XVIII Corps Virginia and North Carolina.

18 July 1863: Brigadier-General Innis Newton Palmer assumed temporary command of XVIII Corps Virginia and North Carolina, succeeding Major-General John Gray Foster.

1 August 1863: IV Corps Virginia and North Carolina was discontinued, and its forces assigned to XVIII Corps Virginia and North Carolina.

1 August 1863: VII Corps Virginia and North Carolina was discontinued, and its forces assigned to XVIII Corps Virginia and North Carolina.

14 August 1863: Major-General John James Peck assumed command of XVIII Corps Virginia and North Carolina, succeeding Brigadier-General Innis Newton Palmer.

16 August 1863: XVIII Corps Virginia and North Carolina transferred from the Department of Virginia and North Carolina to the Army of North Carolina.

XVIII Corps Virginia and North Carolina #2

25 April 1864-2 May 1864

Benjamin Franklin Butler 25 April 1864-2 May 1864

25 April 1864: XVIII Corps North Carolina transferred from the discontinued Army of North Carolina to the Department of Virginia and North Carolina.

25 April 1864: Major-General Benjamin Franklin Butler retained command of XVIII Corps Virginia and North Carolina.

2 May 1864: XVIII Corps transferred from the Department of Virginia and North Carolina to the Army of the James.

XIX Corps Gulf

16 December 1862-7 November 1864

Nathaniel Prentiss Banks 16 December 1862-19 August 1863

William Buel Franklin 20 August 1863-1 May 1864

William Hemsley Emory 2 May 1864-7 May 1864

Michael Kelly Lawler 7 May 1864-8 May 1864

William Plummer Benton 9 May 1864-1 July 1864

Benjamin Stone Roberts temporary 2 July 1864-5 July 1864

Michael Kelly Lawler temporary 6 July 1864

Joseph Jones Reynolds 7 July 1864-7 November 1864

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

16 December 1862: Major-General Nathaniel Prentiss Banks assumed command of XIX Corps Gulf.

5 January 1863: XIX Corps Gulf was officially established retroactively from 16 December 1862.

20 August 1863: Major-General William Buel Franklin assumed command of XIX Corps Gulf, succeeding Major-General Nathaniel Prentiss Banks.

2 May 1864: Brigadier-General William Hemsley Emory assumed command of XIX Corps Gulf, succeeding Major-General William Buel Franklin.

2 July 1864: Brigadier-General Benjamin Stone Roberts assumed temporary command of XIX Corps Gulf, succeeding Brigadier-General William Hemsley Emory.

6 July 1864: Brigadier-General Michael Kelly Lawler assumed temporary command of XIX Corps Gulf, succeeding Brigadier-General Benjamin Stone Roberts.

7 July 1864: Major-General Joseph Jones Reynolds assumed command of XIX Corps Gulf, succeeding Brigadier-General Michael Kelly Lawler.

7 November 1864: XIX Corps Gulf was discontinued. The elements of 1st Division and 2nd Division, known as ‘Detachment XIX Corps’ while serving in the Shenandoah Valley were officially designated XIX Corps Shenandoah. The 3rd Division remained in Louisiana with the interim title XIX Corps Gulf.

7 November 1864: Major-General Joseph Jones Reynolds retained interim command of the remnant of XIX Corps Gulf.

XIX Corps Shenandoah

7 November 1864-20 March 1865

Cuvier Grover 7 November 1864-28 December 1864

William Hemsley Emory 28 December 1864-20 March 1865

7 November 1864: XIX Corps Shenandoah was established in the Army of the Shenandoah.

7 November 1864: Brigadier-General Cuvier Grover was appointed to command XIX Corps Shenandoah, arriving on 11 November 1864.The elements of 1st Division and 2nd Division known as ‘Detachment XIX Corps Gulf’ were designated XIX Corps Shenandoah. The 3rd Division remained in Louisiana with the interim title XIX Corps Gulf.

11 November 1864: Brigadier-General Cuvier Grover arrived to command XIX Corps Shenandoah.

28 December 1864: Brigadier-General William Hemsley Emory assumed command of XIX Corps Shenandoah, succeeding Brigadier-General Cuvier Grover.

20 March 1865: XIX Corps Shenandoah 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.

XXII Corps Washington

2 February 1863-26 June 1865

Samuel Peter Heintzelman 2 February 1863-13 October 1863

Christopher Columbus Augur 13 October 1863-26 April 1865

John Grubb Parke 26 April 1865-26 June 1865

2 February 1863: XXII Corps Washington was established in the Department of Washington.

2 February 1863: Major-General Samuel Peter Heintzelman assumed command of XXII Corps Washington.

13 October 1863: Major-General Christopher Columbus Augur assumed command of XXII Corps Washington, succeeding Major-General Samuel Peter Heintzelman.

26 April 1865: Major-General John Grubb Parke assumed command of XXII Corps Washington, succeeding Major-General Christopher Columbus Augur.

26 June 1865: XXII Corps Washington was discontinued.

XXIII Corps North Carolina

2 February 1865-1 August 1865

John McAllister Schofield 2 February 1865-31 March 1865

Jacob Dolson Cox 31 March 1865-1 August 1865

2 February 1865: XXIII Corps transferred from the Army of the Ohio to the Department of North Carolina but continued to be referred to unofficially as the “Army of the Ohio”.

2 February 1865: Major-General John McAllister Schofield retained command of XXIII Corps North Carolina in the Department of North Carolina.

31 March 1865: Major-General Jacob Dolson Cox assumed command of XXIII Corps North Carolina, succeeding Major-General John McAllister Schofield.

1 August 1865: XXIII Corps North Carolina was discontinued.

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”.

XXIV Corps James

3 December 1864-1 August 1865

Edward Otho Cresap Ord 3 December 1864-5 December 1864

Alfred Howe Terry 6 December 1864-1 January 1865

Charles Devens temporary 2 January 1865-14 January 1865

John Gibbon 15 January 1865-27 April 1865

John Wesley Turner 27 April 1865-17 May 1865

John Gibbon 17 May 1865-8 July 1865

John Wesley Turner 8 July 1865-1 August 1865

3 December 1864: XXIV Corps was established in the Army of the James.

3 December 1864: Major-General Edward Otho Cresap Ord assumed command of XXIV Corps James.

6 December 1864: Brigadier-General Alfred Howe Terry assumed command of XXIV Corps James, succeeding Major-General Edward Otho Cresap Ord.

2 January 1865: Brigadier-General Charles Devens assumed temporary command of XXIV Corps James, succeeding Major-General Alfred Howe Terry.

15 January 1865: Major-General John Gibbon assumed command of XXIV Corps James, succeeding Brigadier-General Charles Devens.

27 April 1865: Brigadier-General John Wesley Turner assumed temporary command of XXIV Corps James, succeeding Major-General John Gibbon.

17 May 1865: Major-General John Gibbon assumed command of XXIV Corps James, succeeding Brigadier-General John Wesley Turner.

8 July 1865: Brigadier-General John Wesley Turner assumed temporary command of XXIV Corps James, succeeding Major-General John Gibbon.

1 August 1865: XXIV Corps James was discontinued.

XXV Corps James

3 December 1864-23 May 1865

Godfrey Weitzel 3 December 1864-31 December 1864

Charles Adam Heckman 1 January 1865-2 February 1865

Godfrey Weitzel 2 February 1865-23 May 1865

3 December 1864: XXV Corps James was established in the Army of the James by consolidating the black divisions from X Corps James and XVIII Corps James.

3 December 1864: Major-General Godfrey Weitzel assumed command of XXV Corps James.

1 January 1865: Brigadier-General Charles Adam Heckman assumed command of XXV Corps James succeeding Major-General Godfrey Weitzel.

2 February 1865: Major-General Godfrey Weitzel assumed command of XXV Corps James, succeeding Brigadier-General Charles Adam Heckman.

23 May 1865: XXV Corps James transferred from the Army of the James to the Military Division of the Southwest.

XXV Corps Southwest

23 May 1865-4 June 1865

Godfrey Weitzel 23 May 1865-4 June 1865

23 May 1865: XXV Corps transferred from the Army of the James to the Military Division of the Southwest.

23 May 1865: Major-General Godfrey Weitzel retained command of XXV Corps Southwest.

4 June 1865: XXV Corps Southwest was discontinued.

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.

Cavalry Corps Potomac

12 February 1863-27 June 1865

George Stoneman 12 February 1863-22 May 1863

Alfred Pleasonton 22 May 1863-22 January 1864

David McMurtrie Gregg temporary 22 January 1864-12 February 1864

Alfred Pleasonton 12 February 1864-25 March 1864

David McMurtrie Gregg temporary 25 March 1864-4 April 1864

Philip Henry Sheridan 4 April 1864-2 August 1864

David McMurtrie Gregg 2 August 1864-10 February 1865

John Irvin Gregg temporary 10 February 1865-24 February 1865

Henry Eugene Davies 24 February 1865-25 March 1865

Wesley Merritt 25 March 1865-22 May 1865

George Crook 22 May 1865-1 June 1865

William Wells 1 June 1865-27 June 1865

12 February 1863: Cavalry Corps Potomac was established in the Army of the Potomac.

12 February 1863: Major-General George Stoneman assumed command of Cavalry Corps Potomac.

22 May 1863: Brigadier-General Alfred Pleasonton assumed command of Cavalry Corps Potomac, succeeding Major-General George Stoneman.

22 January 1864: Brigadier-General David McMurtrie Gregg assumed command of Cavalry Corps Potomac, succeeding Major-General Alfred Pleasonton.

12 February 1864: Major-General Alfred Pleasonton assumed command of Cavalry Corps Potomac, succeeding Brigadier-General David McMurtrie Gregg.

25 March 1864: Brigadier-General David McMurtrie Gregg assumed temporary command of Cavalry Corps Potomac, succeeding Major-General Alfred Pleasonton.

4 April 1864: Major-General Philip Henry Sheridan assumed command of Cavalry Corps Potomac, succeeding Brigadier-General David McMurtrie Gregg.

2 August 1864: Brigadier-General David McMurtrie Gregg assumed command of Cavalry Corps Potomac, succeeding Major-General Philip Henry Sheridan.

10 February 1865: Colonel John Irvin Gregg assumed command of Cavalry Corps Potomac, succeeding Major-General David McMurtrie Gregg.

24 February 1865: Brigadier-General Henry Eugene Davies assumed command of Cavalry Corps Potomac, succeeding Colonel John Irvin Gregg.

25 March 1865: Brigadier-General Wesley Merritt assumed command of Cavalry Corps Potomac, succeeding Brigadier-General Henry Eugene Davies.

26 March 1865: Cavalry Corps Potomac transferred from the Army of the Potomac to Sheridan’s Cavalry Command Potomac.

26 March 1865: Brigadier-General Wesley Merritt retained command of Cavalry Corps Potomac.

6 May 1865: Cavalry Corps Potomac transferred from Sheridan’s Cavalry Command Potomac to the Army of the Potomac.

6 May 1865: Major-General Wesley Merritt retained command of Cavalry Corps Potomac.

22 May 1865: Major-General George Crook assumed command of Cavalry Corps Potomac, succeeding Major-General Wesley Merritt.

1 June 1865: Brigadier-General William Wells assumed command of Cavalry Corps Potomac, succeeding Major-General George Crook.

27 June 1865: Cavalry Corps Potomac was discontinued.

Cavalry Corps Shenandoah

7 August 1864-25 March 1865

Alfred Thomas Archimedes Torbert 7 August 1864-26 January 1865

Wesley Merritt 26 January 1865-25 March 1865

7 August 1864: Cavalry Corps was established in the Army of the Shenandoah.

7 August 1864: Brigadier-General Alfred Thomas Archimedes Torbert was appointed to command Cavalry Corps Shenandoah, arriving on August 10 1864.

10 August 1864: Brigadier-General Alfred Thomas Archimedes Torbert arrived to command Cavalry Corps Shenandoah.

26 January 1865: Brigadier-General Wesley Merritt assumed command of Cavalry Corps Shenandoah, succeeding Brigadier-General Alfred Thomas Archimedes Torbert.

25 March 1865: Cavalry Corps Shenandoah was discontinued, and its forces incorporated into Sheridan’s Cavalry Command.

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.

Reserve Corps Gulf

11 June 1864-17 January 1865

Gordon Granger 11 June 1864-17 January 1865

11 June 1864: Reserve Corps Gulf was established in the Department of the Gulf.

11 June 1864: Major-General Gordon Granger assumed command of Reserve Corps Gulf.

17 January 1865: Reserve Corps Gulf was discontinued and later incorporated into XIII Corps Gulf.

Terry’s Provisional Corps North Carolina

31 January 1865-23 March 1865

Alfred Howe Terry 31 January 1865-23 March 1865

31 January 1865: Terry’s Provisional Corps Virginia transferred from the Department of Virginia to the Department of North Carolina.

31 January 1865: Major-General Alfred Howe Terry retained command of Terry’s Provisional Corps North Carolina.

23 March 1865: Terry’s Provisional Corps North Carolina was discontinued, and its forces transferred to X Corps North Carolina.

Terry’s Provisional Corps Virginia

18 January 1865-31 January 1865

Alfred Howe Terry 18 January 1865-31 January 1865

18 January 1865: Terry’s Provisional Corps transferred from the Department of Virginia and North Carolina to the Department of Virginia.

18 January 1865: Brigadier-General Alfred Howe Terry retained command of Terry’s Provisional Corps Virginia.

31 January 1865: Terry’s Provisional Corps Virginia transferred from the Department of Virginia to the Department of North Carolina.

Terry’s Provisional Corps Virginia and North Carolina

6 January 1865-18 January 1865

Alfred Howe Terry 6 January 1865-18 January 1865

6 January 1865: Terry’s Provisional Corps was established in the Department of Virginia and North Carolina; comprising parts of the former X Corps James.

6 January 1865: Brigadier-General Alfred Howe Terry assumed command of Terry’s Provisional Corps Virginia and North Carolina.

18 January 1865: Terry’s Provisional Corps transferred from the Department of Virginia and North Carolina to the Department of Virginia.

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