Union Organisations: Trans-Mississippi, Northwest, and Frontier Theatre

Union Organisations: Trans-Mississippi, Northwest, and Frontier Theatre

Index

Military Division of the Missouri

Department of Arkansas

Department of Kansas #1
Department of Kansas #2

Department of Kansas #3

Department of the Missouri

Department of the Northwest

Department of the West

Western Department

District of Eastern Arkansas

District of Northern Arkansas (or Northeastern Arkansas)

District of the Upper Arkansas

District of the Border, Kansas and Missouri

District of the Frontier, Arkansas

District of the Frontier (Kansas)

District of the Frontier

District of Iowa

District of Ironton, Missouri

District of Kansas

District of North Kansas

District of South Kansas

District of Little Rock, Arkansas

District of Minnesota

District of the Mississippi

District of Missouri #1

District of Missouri #2

District of Central Missouri #1

District of Central Missouri #2

District of North Missouri #1

District of North Missouri #2

District of North Missouri #3

District of Northeast Missouri #1

District of Northeast Missouri #2

District of Northwest Missouri

District of Southeast Missouri #1

District of Southeast Missouri #2

District of Southwest Missouri

District of Nebraska Territory

First District of the Northwest

Second District of the Northwest

Third District of the Northwest

Fourth District of the Northwest

District of the Plains (Utah, Colorado, and Nebraska)

District of Rolla, Missouri

District of St Louis Missouri #1

District of St Louis Missouri #2

District of Wisconsin

Army of Arkansas

Army of the Border (Kansas)

Army of the Frontier

Army of Kansas

Army of Western Missouri

Army of Southeastern Missouri

Army of Southwestern Missouri

Army of the Southwest

Army of the West

Western Army

VII Corps Arkansas

Military Division of the Missouri

30 January 1865-27 June 1865

John Pope 30 January 1865-27 June 1865

30 January 1865: The Military Division of the Missouri was established. It included the Department of the Northwest and the Department of the Missouri.

30 January 1865: Major-General John Pope was appointed to command the Military Division of the Missouri, arriving on 3 February 1865

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

30 January 1865: The Department of the Missouri transferred from the Military Division of West Mississippi to the Military Division of the Missouri.

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

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

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

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

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

27 June 1865: The Department of the Northwest was discontinued, and its territory incorporated into the Department of the Missouri.

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

27 June 1865: The Military Division of the Missouri was discontinued.

Department of 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: The Department of Arkansas was established. It comprised all of Arkansas except Fort Smith which remained part of the Department of Kansas. Its territory transferred from the Department of the Missouri.

6 January 1864: Major-General Frederick Steele was appointed to command the Department of Arkansas, arriving on 30 January 1864.

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

6 January 1864: The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas.

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

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

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

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

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

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

7 May 1864: The Department of Arkansas transferred to the Military Division of West Mississippi.

7 May 1864: Brigadier-General Nathan Kimball retained temporary command of the Department of Arkansas.

11 May 1864: The District of Little Rock was established in the Department of Arkansas.

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

1 June 1864: The District of Northern Arkansas was discontinued.

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

1 February 1865: The District of the Frontier was discontinued.

4 February 1865: The District of Little Rock was discontinued.

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

21 March 1865: Major-General Joseph Jones Reynolds retained command of the Department of Arkansas.

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

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

17 May 1865: Major-General Joseph Jones Reynolds retained command of the Department of Arkansas.

3 June 1865: The District of South Kansas was discontinued.

5 June 1865: The District of Eastern Arkansas was discontinued.

27 June 1865: The Department of Arkansas transferred from the Military Division of the Southwest to the Military Division of the Mississippi.

27 June 1865: Major-General Joseph Jones Reynolds retained command of the Department of Arkansas.

1 August 1865: The Department of Arkansas was discontinued.

Department of Kansas #1

9 November 1861-19 March 1862

David Hunter 9 November 1861-11 March 1862

David Hunter 11 March 1862-18 March 1862, interim 18 March 1862-19 March 1862

9 November 1861: The Department of Kansas was established, with headquarters at Fort Leavenworth, comprising Kansas, Nebraska Territory, Colorado Territory, Dakota Territory, and the Indian Territory, taken from the Western Department.

9 November 1861: Major-General David Hunter was appointed to command the Department of Kansas, arriving on 20 November 1861.

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

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

19 March 1862: The Department of Kansas was discontinued, and its territory transferred to the District of Kansas.

Department of Kansas #2

2 May 1862-19 September 1862

James Gilpatrick Blunt 2 May 1862-19 September 1862

2 May 1862: The Department of Kansas was re-established from the former District of Kansas, comprising Kansas, Dakota Territory, Nebraska Territory, Indian Territory, and Colorado Territory except for Fort Garland.

2 May 1862: Brigadier-General James Gilpatrick Blunt was appointed to command the Department of Kansas, arriving on 5 May 1862.

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

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

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

19 September 1862: Kansas and Indian Territory transferred from the Department of Kansas to the Department of the Missouri.

19 September 1862: The Army of Kansas was discontinued.

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

19 September 1862: The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri.

Department of Kansas #3

1 January 1864-30 January 1865

Samuel Ryan Curtis 1 January 1864-19 April 1864

George Sykes 20 April 1864-30 January 1865

1 January 1864: The Department of Kansas was established, comprising Kansas, Nebraska Territory, Colorado Territory except Fort Garland, Indian Territory and Fort Smith in Arkansas, transferred from the Department of the Missouri.

1 January 1864: Major-General Samuel Ryan Curtis was appointed to command the Department of Kansas, arriving on 16 January 1864. The District of Nebraska Territory transferred from the Department of the Missouri to the Department of Kansas. It included the Nebraska Territory and Julesburg, Colorado Territory.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

30 January 1865: The District of the Border was discontinued.

30 January 1865: The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri.

Department of the Missouri

9 November 1861-31 December 1865

David Hunter 9 November 1861-9 November 1861, interim 10 November 1861-19 November 1861

Henry Wager Halleck 9 November 1861-23 September 1862

Samuel Ryan Curtis 24 September 1862-12 March 1863 interim to 23 March 1863

John McAllister Schofield 13 March 1863-22 January 1864 interim to 29 January 1864

William Starke Rosecrans 30 January 1864-1 December 1864 interim to 8 December 1864

Grenville Mellen Dodge 2 December 1864-27 June 1865, interim 27 June 1865-21 July 1865

John Pope 21 July 1865-31 December 1865

9 November 1861: The Department of the Missouri was established, comprising Missouri, Iowa, Minnesota, Wisconsin, Illinois, and Arkansas taken from the Western Department and the Department of the East

9 November 1961: Kentucky west of the Cumberland River transferred to the Department of the Missouri from the Department of the Cumberland.

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

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

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

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

9 November 1861: Major-General Henry Wager Halleck was appointed to command the Department of the Missouri, arriving on 19 November 1861.

9 November 1861: Major-General David Hunter retained interim command of the Department of the Missouri.

19 November 1861: Major-General Henry Wager Halleck arrived to command the Department of the Missouri.

21 November 1861: The District of St Louis was established in the Department of the Missouri

26 November 1861: The District of North Missouri was established in the Department of the Missouri.

3 December 1861: The District of Central Missouri was established in the Department of the Missouri.

3 December 1861: The Army of Western Missouri was established in the District of Central Missouri.

23 December 1861: The District of Cairo was established in the Department of the Missouri.

25 December 1861: The District of Southwest Missouri was established in the Department of the Missouri.

25 December 1861: The Army of the Southwest “Army of Southwest Missouri” was established in the District of Southwest Missouri.

31 January 1862: The District of Western Kentucky was discontinued.

6 February 1862: The region of Western Tennessee transferred from the Department of the Ohio to the Department of the Missouri.

14 February 1862: The District of West Tennessee was established in the Department of the Missouri.

23 February 1862: The Army of the Mississippi was officially announced for the proposed Department of the Mississippi, to be formally established on March 1 1862.

23 February 1862: The District of the Mississippi was established in the Department of the Missouri.

27 February 1862: The Army of the Mississippi transferred to the District of the Mississippi.

12 March 1862: The District of Northeast Missouri was established in the Department of the Missouri.

12 March 1862: The District of Northwest Missouri was established in the Department of the Missouri.

1 April 1862: The Sub-District of Columbus was established in the District of Cairo.

2 May 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri.

11 May 1862: The District of Southeast Missouri was discontinued.

1 June 1862: The District of Central Missouri was discontinued, and incorporated into the District of Missouri.

1 June 1862: The District of Missouri was established in the Department of the Missouri.

4 June 1862: The District of St Louis was discontinued, and incorporated into the District of Missouri.

4 June 1862: The District of Northeast Missouri was discontinued, and incorporated into the District of Missouri.

19 September 1862: The Department of the Missouri was reorganised to comprise Missouri, Arkansas, Kansas, and the Indian Territory

19 September 1862: The Department of Kansas was discontinued, and its territory incorporated into the Department of the Missouri.

19 September 1862: Kansas and Indian Territory transferred from the Department of Kansas to the Department of the Missouri.

19 September 1862:  Alton, Illinois, transferred from the Department of the Ohio to the Department of the Missouri.

19 September 1862: The District of St Louis was established in the Department of the Missouri.

19 September 1862: The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri.

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

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

26 September 1862: The District of Central Missouri was established in the Department of the Missouri.

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

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

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

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

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

2 November 1862: The District of Colorado was renamed as the District of Colorado Territory.

2 November 1862: The District of Eastern Arkansas was established in the Department of the Missouri.

2 November 1862: The District of Nebraska Territory was established in the Department of the Missouri.

2 November 1862: The District of Rolla was established in the Department of the Missouri.

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

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

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

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

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

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

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

30 March 1863: The District of Southwest Missouri was extended southwards to the Arkansas River.

30 March 1863: The District of St Louis was reduced in territory.

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

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

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

6 July 1863: The District of North Missouri was established in the Department of the Missouri.

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

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

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

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

30 November 1863: The District of Northern Arkansas also known as the District of Northeastern Arkansas was established in the Department of the Missouri.

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

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

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

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

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

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

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

27 May 1864: The Department of the Missouri transferred to the Military Division of West Mississippi.

27 May 1864: Major-General William Starke Rosecrans retained command of the Department of the Missouri.

18 August 1864: The southern border of the District of Southwest Missouri was redefined as the Missouri-Arkansas state line.

2 December 1864: Major-General Grenville Mellen Dodge was appointed to command the Department of the Missouri, arriving on 9 December 1864, to succeed Major-General William Starke Rosecrans.

9 December 1864: Major-General Grenville Mellen Dodge arrived to command the Department of the Missouri, succeeding Major-General William Starke Rosecrans.

26 December 1864: The northern border of the District of Southwest Missouri was re-defined as the Osage River.

30 January 1865: The Military Division of the Missouri was established. It included the Department of the Northwest and the Department of the Missouri.

30 January 1865: The Department of the Missouri transferred from the Military Division of West Mississippi to the Military Division of the Missouri.

30 January 1865: Major-General Grenville Mellen D0dge retained command of the Department of the Missouri.

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

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

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

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

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

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

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

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

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

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

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

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

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

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

27 June 1865: The Military Division of the Mississippi was reorganised to consist of the Department of the Ohio, the Department of the Missouri, and the Department of Arkansas.

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

27 June 1865: Alton, Illinois, transferred from the Department of the Missouri to the Department of the Ohio.

27 June 1865: Fort Garland, Arkansas, transferred from the Department of New Mexico to the Department of the Missouri.

27 June 1865: Major-General John Pope was appointed to command of the Department of the Missouri, arriving on 21 July 1865.

27 June 1865: Major-General Grenville Mellen Dodge retained interim command of the Department of the Missouri. 27 June 1865: The Department of the Northwest was discontinued, and its territory incorporated into the Department of the Missouri.

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

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

1 July 1865: The District of North Missouri was discontinued.

10 July 1865: The District of Central Missouri was discontinued.

10 July 1865: The District of Rolla was discontinued.

10 July 1865: The District of Southwest Missouri was discontinued.

10 July 1865: The District of St Louis was discontinued.

10 July 1865: The District of the Upper Arkansas was discontinued.

10 July 1865: The District of Missouri was established in the Department of the Missouri. It consisted of the territories previously in the District of St Louis, the District of Central Missouri and the District of Rolla.

21 July 1865: Major-General John Pope arrived to command the Department of the Missouri, succeeding Major-General Grenville Mellen Dodge.

22 August 1865: The District of Missouri was discontinued.

30 October 1865: The state of Wisconsin transferred from the Department of the Missouri to the Department of the Ohio.

Department of the Northwest

6 September 1862-27 June 1865

John Pope 6 September 1862-27 November 1862

Washington Lafayette Elliott temporary 28 September 1862-12 February 1863 interim to 27 February 1863

John Pope 13 February 1863-19 February 1865

Samuel Ryan Curtis 30 January 1865-27 June 1865

6 September 1862: The Department of the Northwest was established, comprising the states of Wisconsin, Iowa and Minnesota, and Nebraska Territory and Dakota Territory. Headquarters were at Madison, and later at Milwaukee, Wisconsin.

6 September 1862: The states of Minnesota and Iowa were detached from the Department of the Mississippi. Wisconsin was taken from the Department of the Ohio.

6 September 1862:  Dakota Territory and Nebraska Territory transferred from the Department of Kansas to the Department of the Northwest.

6 September 1862: Major-General John Pope was appointed to command of the Department of the Northwest, arriving on 16 September 1862.

16 September 1862: The District of Wisconsin was established in the Department of the Northwest, comprising the state of Wisconsin.

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

17 November 1862: The Department of the Northwest was divided into the First District, Second District, Third District and Fourth District.

17 November 1862: The First District of the Department of the Northwest was established. It comprised Iowa and the Dakota Territory.

17 November 1862: The Second District of the Department of the Northwest was established. It comprised the vicinity of Fort Snelling, Minnesota.

17 November 1862: The Third District of the Department of the Northwest was established. It comprised the vicinity of Fort Ripley, Minnesota.

17 November 1862: The Fourth District of the Department of the Northwest was established. It comprised the vicinity of Fort Abercrombie, Minnesota.

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

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

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

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

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

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

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

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

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

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

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

12 November 1864: The District of Iowa was discontinued.

30 January 1865: The Military Division of the Missouri was established. It included the Department of the Northwest and the Department of the Missouri.

30 January 1865: The Department of the Northwest was subordinated to the Military Division of the Missouri.

30 January 1865: Major-General John Pope retained interim command of the Department of the Northwest, pending the arrival of Major-General Samuel Ryan Curtis.

30 January 1865: Major-General Samuel Ryan Curtis was appointed to command the Department of the Northwest, arriving on 17 February 1865.

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

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

27 June 1865: The District of Wisconsin was discontinued.

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

27 June 1865: The Department of the Northwest was discontinued, and its territory incorporated into the Department of the Missouri.

Department of the West

1 January 1861-3 July 1861

William Selby Harney 1 January 1861–22 April 1861

Nathaniel Lyon temporary de facto 22 April 1861-28 April 1861

Edmund Brooke Alexander temporary 29 April 1861-10 May 1861

William Selby Harney 11 May 1861-30 May 1861

Nathaniel Lyon 31 May 1861-3 July 1861

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

1 January 1861: The Department of the West was commanded by Brigadier-General USA William Selby Harney

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

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

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

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

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

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

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

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

Western Department

3 July 1861-9 November 1861

Nathaniel Lyon 3 July 1861-24 July 1861

John Charles Frémont 25 July 1861-1 November 1861

David Hunter 2 November 1861-9 November 1861

3 July 1861: The Western Department was established, with headquarters at St Louis, Missouri, comprising Arkansas, Iowa, Minnesota, Kansas, Nebraska Territory, Colorado Territory, Dakota Territory, and Indian Territory from the discontinued Department of the West; Missouri and Illinois were taken from the Department of the Ohio; New Mexico Territory was taken from the discontinued Department of New Mexico. Missouri and Illinois transferred from the Department of the Ohio to the Western Department.

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

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

3 July 1861: Major-General John Charles Frémont was appointed to command the Western Department, arriving on 25 July 1861.

3 July 1861: Brigadier-General Nathaniel Lyon retained interim command of the Western Department.

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

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

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

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

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

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

1 September 1861: The District of Ironton was discontinued.

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

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

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

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

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

9 November 1861: The Western Department was discontinued, and its territory divided between the Department of New Mexico, the Department of the Missouri, and the Department of Kansas.

District of Eastern Arkansas

2 November 1862-5 June 1865

Alvin Peterson Hovey 2 November 1862-2 December 1862

Willis Arnold Gorman 3 December 1862-14 February 1863

Benjamin Mayberry Prentiss 14 February 1863-3 August 1863

Frederick Sigel Salomon 3 August 1863-19 September 1863

Napoleon Bonaparte Buford 19 September 1863-5 August 1864

William Crooks temporary 6 August 1864-27 September 1864

Napoleon Bonaparte Buford 28 September 1864-6 October 1864

William Crooks temporary 7 October 1864-18 October 1864

Napoleon Bonaparte Buford 19 October 1864-8 March 1865

Alexander McDowell McCook 9 March 1865-26 April 1865

Charles Bentzoni temporary 27 April 1865-12 May 1865

John Milton Thayer 13 May 1865-5 June 1865

2 November 1862: The District of Eastern Arkansas was established in the Department of the Missouri, comprising the territory around Helena, Arkansas.

2 November 1862: Brigadier-General Alvin Peterson Hovey assumed command of the District of Eastern Arkansas.

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

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

14 February 1863: Major-General Benjamin Mayberry Prentiss assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Willis Arnold Gorman.

3 August 1863: Brigadier-General Frederick Sigel Salomon assumed command of the District of Eastern Arkansas, succeeding Major-General Benjamin Mayberry Prentiss.

19 September 1863: Brigadier-General Napoleon Bonaparte Buford assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Frederick Sigel Salomon.

6 January 1864: The District of Eastern Arkansas transferred from the Department of the Tennessee to the Department of Arkansas.

6 January 1864: Brigadier-General Napoleon Bonaparte Buford retained command of the District of Eastern Arkansas.

6 August 1864: Colonel William Crooks assumed temporary command of the District of Eastern Arkansas, succeeding Brigadier-General Napoleon Bonaparte Buford.

28 September 1864: Brigadier-General Napoleon Bonaparte Buford assumed command of the District of Eastern Arkansas, succeeding Colonel William Crooks.

7 October 1864: Colonel William Crooks assumed temporary command of the District of Eastern Arkansas, succeeding Brigadier-General Napoleon Bonaparte Buford.

19 October 1864: Brigadier-General Napoleon Bonaparte Buford assumed command of the District of Eastern Arkansas, succeeding Colonel William Crooks.

9 March 1865: Major-General Alexander McDowell McCook assumed command of the District of Eastern Arkansas, succeeding Brigadier-General Napoleon Bonaparte Buford.

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

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

17 May 1865: Brigadier-General John Milton Thayer assumed command of the District of Eastern Arkansas.

5 June 1865: The District of Eastern Arkansas was discontinued.

District of Northern Arkansas (or Northeastern Arkansas)

30 November 1863-1 June 1864

Robert Ramsey Livingston 30 November 1863-1 June 1864

30 November 1863: The District of Northern Arkansas also known as the District of Northeastern Arkansas was established in the Department of the Missouri. It comprised the territory around Batesville, Arkansas.

30 November 1863: Colonel Robert Ramsey Livingston assumed command of the District of Northern Arkansas.

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

6 January 1864: Colonel Robert Ramsey Livingston retained command of the District of Northern Arkansas.

1 June 1864: The District of Northern Arkansas was discontinued.

District of the Upper Arkansas

2 August 1864-10 July 1865

James Gilpatrick Blunt 2 August 1864-13 October 1864

Benjamin S Henning temporary 14 October 1864-21 December 1864

James Hobart Ford 22 December 1864-10 July 1865

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

2 August 1864: Major-General James Gilpatrick Blunt assumed command of the District of the Upper Arkansas.

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

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

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

30 January 1865: Colonel James Hobart Ford retained command of the District of the Upper Arkansas.

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

10 July 1865: The District of the Upper Arkansas was discontinued.

District of the Border (Kansas and Missouri)

9 June 1863-30 January 1865

Thomas Ewing 9 June 1863-5 January 1864

William Russell Jones 6 January 1864-30 January 1865

9 June 1863: The District of the Border was established in the Department of the Missouri, comprising the state of Kansas north of the 38 parallel and the two western tiers of counties in Missouri north of the 38 parallel and south of the Missouri River.

9 June 1863: Brigadier-General Thomas Ewing assumed command of the District of the Border.

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

1 January 1864: Brigadier-General Thomas Ewing retained command of the District of the Border.

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

30 January 1865: The District of the Border was discontinued.

District of the Frontier, Arkansas

9 June 1863–23 February 1864

James Gilpatrick Blunt 9 June 1863-23 February 1864

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

9 June 1863: Brigadier-General James Gilpatrick Blunt assumed command of the District of the Frontier.

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

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

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

6 January 1864: Major-General James Gilpatrick Blunt retained command of the District of the Frontier Arkansas.

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

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

District of the Frontier (Kansas)

6 January 1864-23 February 1864

John Milton Thayer 6 January 1864-23 February 1864

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

6 January 1864: Brigadier-General John Milton Thayer assumed command of the District of the Frontier Kansas.

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

District of the Frontier

23 February 1864-1 February 1865

James Gilpatrick Blunt 23 February 1864-18 May 1864

John Milton Thayer 19 May 1864-1 February 1865

23 February 1864: The District of the Frontier in the Department of Arkansas was established.

23 February 1864: Brigadier-General James Gilpatrick Blunt assumed command of the District of the Frontier in the Department of Arkansas.

19 May 1864: Brigadier-General John Milton Thayer assumed command of the District of the Frontier, succeeding Major-General James Gilpatrick Blunt.

1 February 1865: The District of the Frontier in the Department of Arkansas was discontinued.

District of Iowa

8 June 1863-12 November 1864

Benjamin Stone Roberts 8 June 1863-3 December 1864

Alfred Sully 4 December 1863-12 November 1864

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

8 June 1863: Brigadier-General Benjamin Stone Roberts assumed command of the District of Iowa.

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

4 December 1863: Brigadier-General Alfred Sully assumed command of the District of Iowa, succeeding Brigadier-General Benjamin Stone Roberts.

12 November 1864: The District of Iowa was discontinued.

District of Ironton, Missouri

5 July 1861-1 September 1861

Benjamin Gratz Brown 5 July 1861-7 August 1861

Ulysses Simpson Grant 8 August 1861-14 August 1861

Benjamin Mayberry Prentiss 15 August 1861-1 September 1861

5 July 1861: The District of Ironton was established in the Western Department, comprising the territory around Ironton, Missouri.

5 July 1861: Colonel Benjamin Gratz Brown assumed command of the District of Ironton.

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

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

1 September 1861: The District of Ironton was discontinued.

District of Kansas

19 March 1862-2 May 1862

David Hunter interim 18 March 1862-1 April 1862

James William Denver 19 March 1862-10 April 1862

Samuel Davis Sturgis 10 April 1862-2 May 1862

19 March 1862: The District of Kansas was established in the Department of the Mississippi.

19 March 1862: Brigadier-General James William Denver was appointed to command the District of Kansas, arriving on 1 April 1862.

19 March 1862: Major-General David Hunter retained interim command of the District of Kansas.

1 April 1862: Brigadier-General James William Denver arrived to command the District of Kansas.

10 April 1862: Brigadier-General Samuel Davis Sturgis assumed command of the District of Kansas, succeeding Brigadier-General James William Denver.

10 April 1862: Brigadier-General Samuel Davis Sturgis assumed command of the District of Kansas, succeeding Brigadier-General James William Denver.

2 May 1862: The District of Kansas was discontinued and renamed the Department of Kansas.

District of North Kansas

28 February 1864-27 May 1865

Thomas Alfred Davies 28 February 1864-27 March 1865

Robert Byington Mitchell 28 March 1865-27 May 1865

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

28 February 1864: Brigadier-General Thomas Alfred Davies assumed command of the District of North Kansas.

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

30 January 1865: Brigadier-General Thomas Alfred Davies retained command of the District of North Kansas.

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

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

District of South Kansas

28 February 1864-3 June 1865

Thomas Jefferson McKean 28 February 1864-31 August 1864

George Sykes 1 September 1864-9 October 1864

James Gilpatrick Blunt 10 October 1864-30 October 1864

Thomas Alfred Davies 31 October 1864-21 November 1864

James Gilpatrick Blunt 22 November 1864-3 June 1865

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

28 February 1864: Brigadier-General Thomas Jefferson McKean assumed command of the District of South Kansas.

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

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

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

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

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

30 January 1865: Major-General James Gilpatrick Blunt retained command of the District of South Kansas.

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

22 April 1865: Major-General James Gilpatrick Blunt retained command of the District of South Kansas.

3 June 1865: The District of South Kansas was discontinued.

District of Little Rock, Arkansas

11 May 1864-4 February 1865

Eugene Asa Carr 11 May 1864-4 February 1865

11 May 1864: The District of Little Rock was established in the Department of Arkansas, comprising the posts of Little Rock, Lewisburg, and Pine Bluff.

11 May 1864: Brigadier-General Eugene Asa Carr assumed command of the District of Little Rock.

4 February 1865: The District of Little Rock in the Department of Arkansas was discontinued.

District of Minnesota

23 November 1862-31 December 1865

Henry Hastings Sibley 23  November 1862-31 December 1865

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

23 November 1862: Brigadier-General Henry Hastings Sibley assumed command of the District of Minnesota.

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

27 June 1865: Brigadier-General Henry Hastings Sibley retained command of the District of Minnesota.

District of the Mississippi

27 February 1862-16 June 1862

John Pope 27 February 1862-21 April 1862

Isaac Ferdinand Quinby 21 April 1862-16 June 1862

27 February 1862: The District of the Mississippi was established in the Department of the Missouri, comprising the parts of Missouri between the Saint Francis River and the Mississippi River.

27 February 1862: Brigadier-General John Pope assumed command of the District of the Mississippi.

27 February 1862: The Army of the Mississippi transferred to the District of the Mississippi.

11 March 1862: The Army of the Mississippi transferred from the District of the Mississippi to the Department of the Mississippi.

21 April 1862: Brigadier-General Isaac Ferdinand Quinby assumed command of the District of the Mississippi, succeeding Major-General John Pope.

16 June 1862: The District of the Mississippi was discontinued, and its territory transferred the District of West Tennessee.

District of Missouri #1

1 June 1862-26 September 1862

John McAllister Schofield 1 June 1862-26 September 1862

1 June 1862: The District of Missouri was established in the Department of the Mississippi, comprising the state of Missouri except for Mississippi, New Madrid, and Pemiscut counties.

1 June 1862: Brigadier-General John McAllister Schofield assumed command of the District of Missouri.

19 September 1862: The District of Missouri transferred from the Department of the Mississippi to the Department of the Missouri.

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

District of Missouri #2

10 July 1865-22 August 1865

James Alexander Williamson 10 July 1865-21 July 1865

Thomas Church Haskell Smith 21 July 1865-22 August 1865

10 July 1865: The District of Missouri was established in the Department of the Missouri. It consisted of the territories previously in the District of St Louis, the District of Central Missouri, and the District of Rolla.

10 July 1865: Brigadier-General James Alexander Williamson assumed command of the District of Missouri.

21 July 1865: Brigadier-General Thomas Church Haskell Smith assumed command of the District of Missouri, succeeding Brigadier-General James Alexander Williamson.

22 August 1865: The District of Missouri was discontinued.

District of Central Missouri #1

3 December 1861-1 June 1862

John Pope 3 December 1861-12 February 1862

James Totten 12 February 1862-1 June 1862

3 December 1861: The District of Central Missouri was established in the Department of the Missouri, comprising the region between the Missouri and Osage Rivers in Missouri.

3 December 1861: Brigadier-General John Pope assumed command of the District of Central Missouri.

3 December 1861: The Army of Western Missouri was established in the District of Central Missouri.

12 February 1862: The Army of Western Missouri was discontinued.

12 February 1862: Lieutenant-Colonel James Totten assumed command of the District of Central Missouri, succeeding Brigadier-General John Pope.

1 June 1862: The District of Central Missouri was discontinued, and incorporated into the District of Missouri.

District of Central Missouri #2

26 September 1862-10 July 1865

Benjamin Franklin Loan 26 September 1863-8 June 1863

Egbert Benson Brown 9 June 1863-23 July 1864

Alfred Pleasonton 24 July 1864-2 September 1864

Egbert Benson Brown 3 September 1864-2 November 1864

John Finis Philips 3 November 1864-26 February 1865

John McNeil 27 February 1865-11 April 1865

Chester Harding 12 April 1865-25 June 1865

John Lourie Beveridge 26 June 1865-10 July 1865

26 September 1862: The District of Central Missouri was established in the Department of the Missouri, comprising the region of Missouri between the Missouri and Osage Rivers.

26 September 1862: State Brigadier-General Benjamin Franklin Loan assumed command of the District of Central Missouri.

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

24 July 1864: Major-General Alfred Pleasonton assumed command of the District of Central Missouri, succeeding Brigadier-General Egbert Benson Brown.

3 September 1864: Brigadier-General Egbert Benson Brown assumed command of the District of Central Missouri, succeeding Major-General Alfred Pleasonton.

3 November 1864: Colonel John Finis Philips assumed command of the District of Central Missouri, succeeding Brigadier-General Egbert Benson Brown.

27 February 1865: Brigadier-General John McNeil assumed command of the District of Central Missouri, succeeding Colonel John Finis Philips.

12 April 1865: State Colonel Chester Harding assumed command of the District of Central Missouri, succeeding Brigadier-General John McNeil.

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

10 July 1865: The District of Central Missouri was discontinued, and its territory transferred to the District of Missouri.

District of North Missouri #1

29 July 1861-9 November 1861

John Pope 29 July 1861-9 November 1861

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

29 July 1861: Brigadier-General John Pope assumed command of the District of North Missouri.

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

District of North Missouri #2

26 November 1861-11 March 1862

Benjamin Mayberry Prentiss 26 November 1861-26 December 1861

John McAllister Schofield 26 December 1861-11 March 1862

26 November 1861: The District of North Missouri was re-established in the Department of the Missouri, comprising the territory of the state north of the Missouri River.

26 November 1861: Brigadier-General Benjamin Mayberry Prentiss assumed command of the District of North Missouri.

26 December 1861: Brigadier-General John McAllister Schofield assumed command of the District of North Missouri, succeeding Brigadier-General Benjamin Mayberry Prentiss.

11 March 1862: The District of North Missouri was discontinued, and incorporated into the District of Northwest Missouri.

District of North Missouri #3

6 July 1863-1 July 1865

Odon Guitar 6 July 1863-5 April 1864

Clinton Bowen Fisk 6 April 1864-24 May 1865

Vacant 25 May 1865-27 May 1865

George Spalding 28 May 1865-1 July 1865

6 July 1863: The District of North Missouri was established in the Department of the Missouri, comprising the territory of the state north of the Missouri River.

6 July 1863: State Brigadier-General Odon Guitar assumed command of the District of North Missouri.

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

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

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

1 July 1865: The District of North Missouri was discontinued.

District of Northeast Missouri #1

12 March 1862-4 June 1862

John Montgomery Glover 12 March 1862-4 June 1862

12 March 1862: The District of Northeast Missouri was established in the Department of the Missouri, comprising the state of Missouri north of Randolph County and east of Linn County.

12 March 1862: Colonel John Montgomery Glover assumed command of the District of Northeast Missouri.

4 June 1862: The District of Northeast Missouri was discontinued, and incorporated into the District of Missouri.

District of Northeast Missouri #2

27 September 1862-7 February 1864

Lewis Merrill 27 September 1862-26 January 1863

Thomas Jefferson McKean 26 January 1863-12 March 1863

Thomas Alfred Davies 12 March 1863-7 February 1864

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

27 September 1862: Colonel Lewis Merrill assumed command of the District of Northeast Missouri.

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

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

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

District of Northwest Missouri

12 March 1862-6 July 1863

Benjamin Franklin Loan 12 March 1862-4 June 1862,

Vacant 4 June 1862-13 August 1862

Willard Preble Hall 23 August 1862-9 April 1863

Chester Harding 10 April 1863-22 June 1863

Willard Preble Hall 23 June 1863-6 July 1863

12 March 1862: The District of Northwest Missouri was established in the Department of the Missssippi, comprising the state of Missouri north of the Missouri River and west of the eastern boundary of Linn County.

12 March 1862: Missouri State Brigadier-General Benjamin Franklin Loan assumed command of the District of Northwest Missouri.

4 June 1862: Command of the District of Northwest Missouri became vacant.

23 August 1862: State Brigadier-General Willard Preble Hall assumed command of the District of Northwest Missouri, succeeding a vacancy after State Brigadier-General Benjamin Franklin Loan.

19 September 1862: The District of Northwest Missouri transferred from the Department of the Mississippi to the Department of the Missouri.

19 September 1862: Colonel Willard Preble Hall retained command of the District of Northwest Missouri.

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

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

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

District of Southeast Missouri #1

1 September 1861-11 May 1862

Ulysses Simpson Grant 1 September 1861-1 March 1862

Frederick Steele 1 March 1862-11 May 1862

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

1 September 1861: Brigadier-General Ulysses Simpson Grant assumed command of the District of Southeast Missouri.

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

9 November 1861: Brigadier-General Ulysses Simpson Grant retained command of the District of Southeast Missouri.

1 March 1862: Brigadier-General Frederick Steele assumed command of the District of Southeast Missouri, succeeding Major-General Ulysses Simpson Grant.

2 May 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest

11 May 1862: The District of Southeast Missouri was discontinued.

District of Southeast Missouri #2

16 June 1863-30 November 1863

John Wynn Davidson 16 June 1863-19 July 1863

Clinton Bowen Fisk 20 July 1863-30 November 1863

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

16 June 1863: Brigadier-General John Wynn Davidson assumed command of the District of Southeast Missouri.

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

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

District of Southwest Missouri

25 December 1861-10 July 1865

Samuel Ryan Curtis 25 December 1861-4 June 1862

Egbert Benson Brown 4 June 1862-23 September 1862

John McAllister Schofield 24 September 1862-9 November 1862

Egbert Benson Brown 10 November 1862-29 March 1863

John McAllister Schofield 30 March 1863-23 May 1863

William Fletcher Cloud temporary 24 May 1863-14 June 1863,

John McNeil 15 June 1863-14 October 1863

John Benjamin Sanborn 15 October 1863-8 December 1864

Joseph Jackson Gravely temporary 9 December 1864-8 January 1865

John Benjamin Sanborn 9 January 1865-9 June 1865

John D Allen temporary 10 June 1865-18 June 1865

Thomas Jefferson McKean 19 June 1865-10 July 1865

25 December 1861: The District of Southwest Missouri was established in the Department of the Missouri, comprising the state of Missouri south of the Osage River and west of the Meramec River.

25 December 1861: Brigadier-General Samuel Ryan Curtis assumed command of the District of Southwest Missouri. 25 December 1861: The Army of the Southwest “Army of Southwest Missouri” was established in the District of Southwest Missouri.

2 May 1862: The District of Southeast Missouri transferred to the operational command of the District of Southwest Missouri.

11 May 1862: The District of Southeast Missouri was discontinued.

4 June 1862: State Brigadier-General Egbert Benson Brown assumed command of the District of Southwest Missouri, succeeding Major-General Samuel Ryan Curtis.

19 September 1862: The District of Southwest Missouri was reorganised to comprise the counties of Vernon, Barton, Jasper, Newton, McDonald, Cedar, Dade, Lawrence, Barry, Polk, Green, Christian, Stone, Taney, Ozark, Douglas, Webster, Wright, La Clede and parts of Hickory and St Clair in Missouri.

19 September 1862: State Brigadier-General Egbert Benson Brown retained command of the District of Southwest Missouri.

19 September 1862: The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri.

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

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

30 March 1863: The District of Southwest Missouri was extended southwards to the Arkansas River.

30 March 1863: Brigadier-General John McAllister Schofield assumed command of the District of Southwest Missouri, succeeding Brigadier-General Egbert Benson Brown.

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

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

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

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

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

18 August 1864: The southern border of the District of Southwest Missouri was redefined as the Missouri-Arkansas state line.

9 December 1864: Colonel Joseph Jackson Gravely assumed temporary command of the District of Southwest Missouri, succeeding Brigadier-General John Benjamin Sanborn.

26 December 1864: The northern border of the District of Southwest Missouri was re-defined as the Osage River.

9 January 1865: Brigadier-General John Benjamin Sanborn assumed command of the District of Southwest Missouri, succeeding Colonel Joseph Jackson Gravely.

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

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

10 July 1865: The District of Southwest Missouri was discontinued.

District of Nebraska Territory

2 November 1862-28 March 1865

James Craig 2 November 1862-4 May 1863

William Fletcher Sapp temporary 5 May 1863-3 June 1863

Thomas Jefferson McKean 4 June 1863-27 February 1864

Robert Byington Mitchell 28 February 1864-28 March 1865

2 November 1862: The District of Nebraska Territory was established in the Department of the Missouri.

2 November 1862: Brigadier-General James Craig assumed command of the District of Nebraska Territory.

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

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

1 January 1864: The District of Nebraska Territory transferred from the Department of the Missouri to the Department of Kansas. It included the Nebraska Territory and Julesburg, Colorado Territory.

1 January 1864: Brigadier-General Thomas Jefferson McKean retained command of the District of Nebraska Territory.

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

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

30 January 1865: Brigadier-General Robert Byington Mitchell retained command of the District of Nebraska Territory.

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

First District of the Northwest

17 November 1862-1 June 1863

John Cook 17 November 1862-1 June 1863

17 November 1862: The First District of the Department of the Northwest was established. It comprised Iowa and the Dakota Territory.

17 November 1862: Brigadier-General John Cook assumed command of the First District of the Department of the Northwest.

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

Second District of the Northwest

17 November 1862-23 November 1862

Henry Hastings Sibley 17 November 1862-23 November 1865

17 November 1862: The Second District of the Department of the Northwest was established. It comprised the vicinity of Fort Snelling, Minnesota.

17 November 1862: Brigadier-General Henry Hastings Sibley assumed command of the Second District of the Department of the Northwest.

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

Third District of the Northwest

17 November 1862-27 November 1862

Minor T Thomas 17 November 1862-27 November 1862

17 November 1862: The Third District of the Department of the Northwest was established. It comprised the vicinity of Fort Ripley, Minnesota.

17 November 1862: Colonel Minor T Thomas assumed command of the Third District of the Department of the Northwest.

27 November 1862: The Third District of the Department of the Northwest was discontinued and incorporated into the District of Minnesota.

Fourth District of the Northwest

17 November 1862-27 November 1862

Francis Peteler 17 November 1862-27 November 1862

17 November 1862: The Fourth District of the Department of the Northwest was established. It comprised the vicinity of Fort Abercrombie, Minnesota.

17 November 1862: Lieutenant-Colonel Francis Peteler assumed command of the Fourth District of the Department of the Northwest.

27 November 1862: The Fourth District of the Department of the Northwest was discontinued and incorporated into the District of Minnesota.

District of the Plains (Utah, Colorado, and Nebraska)

28 March 1865-25 May 1865

Patrick Edward Connor 28 March 1865-25 May 1865

28 March 1865: The District of the Plains was established in the Department of the Missouri. It incorporated the territory of the District of Utah, the District of Colorado, and the District of Nebraska Territory.

28 March 1865: Brigadier-General Patrick Edward Connor assumed command of the District of the Plains.

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

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

District of Rolla, Missouri

2 November 1862-10 July 1865

John Montgomery Glover 2 November 1862-12 March 1863

Thomas Alfred Davies 13 March 1863-24 March 1864

Odon Guitar 25 March 1864-22 August 1864

John McNeil 23 August 1864-3 October 1864

Albert Sigel 4 October 1864-2 November 1864

John Finis Philips 3 November 1864-27 November 1864

Albert Sigel 28 November 1864-1 December 1864

Edwin C Catherwood 2 December 1864-4 January 1865

Egbert Benson Brown 5 January 1865-7 March 1865

Edwin C Catherwood 8 March 1865-16 March 1865

John Morrill 17 March 1865-10 July 1865

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

2 November 1862: Colonel John Montgomery Glover assumed command of the District of Rolla.

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

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

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

23 August 1864: Brigadier-General John McNeil assumed command of the District of Rolla, succeeding State Brigadier-General Odon Guitar.

4 October 1864: State Colonel Albert Sigel assumed temporary command of the District of Rolla, succeeding Brigadier-General John McNeil.

3 November 1864: Colonel John Finis Philips assumed command of the District of Rolla, succeeding Colonel Albert Sigel.

28 November 1864: Colonel Albert Sigel assumed temporary command of the District of Rolla, succeeding State Colonel John Finis Phillips.

2 December 1864: Missouri State Colonel Edwin C Catherwood assumed temporary command of the District of Rolla, succeeding Colonel Albert Sigel.

5 January 1865: Brigadier-General Egbert Benson Brown assumed command of the District of Rolla, succeeding Colonel Edward C Catherwood.

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

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

10 July 1865: The District of Rolla was discontinued, and its territory incorporated into the District of Missouri.

District of St Louis Missouri #1

21 November 1861-4 June 1862

John McAllister Schofield 21 November 1861-10 April 1862

Lewis Merrill 10 April 1862-4 June 1862

21 November 1861: The District of St Louis was established in the Department of the Missouri, bounded by the Mississippi, Missouri and Meramec Rivers and the railroad line from Pacific to Rolla as far as Lindsey’s Station and a line drawn from the mouth of the Osage River just west of Jefferson City to the Meramec River.

21 November 1861: Brigadier-General John McAllister Schofield assumed command of the District of St Louis.

10 April 1862: Colonel Lewis Merrill assumed command of the District of St Louis, succeeding Brigadier-General John McAllister Schofield.

4 June 1862: The District of St Louis was discontinued, and incorporated into the District of Missouri.

District of St Louis Missouri #2

19 September 1862-10 July 1865

John Wynn Davidson 19 September 1862-2 December 1862

Vacant 3 December 1862-22 February 1863

John Wynn Davidson 23 February 1863-15 June 1863

William Kerley Strong 16 June 1863-27 May 1864

Vacant 27 May 1864-23 July 1864

Alfred Pleasonton 24 July 1864-8 December 1864

George Day Wagner 9 December 1864-19 June 1865

James Alexander Williamson 20 June 1865-10 July 1865

19 September 1862: The District of St Louis was re-established in the Department of the Missouri.

19 September 1862: Brigadier-General John Wynn Davidson assumed command of the District of St Louis.

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

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

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

16 June 1863: The District of Southeast Missouri was established in the Department of the Missouri, comprising that part of the District of St Louis south of a line running east through Steeleville, including Cape Girardeau, Centreville, Fredericktown, Ironton, New Madrid, Patterson and Pilot Knob, Missouri.

16 June 1863: Brigadier-General William Kerley Strong assumed command of the District of St Louis, succeeding Brigadier-General John Wynn Davidson.

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

24 July 1864: Major-General Alfred Pleasonton assumed command of the District of St Louis after a vacancy.

9 December 1864: Brigadier-General George Day Wagner assumed command of the District of St Louis, succeeding Major-General Alfred Pleasonton.

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

10 July 1865: The District of St Louis was discontinued, and its territory transferred to the District of Missouri.

District of Wisconsin

6 September 1862-27 June 1865

Washington Lafayette Elliott 6 September 1862-15 February 1863

Thomas Church Haskell Smith 16 February 1863-16 April 1865

Thomas Alfred Davies 17 April 1865-27 June 1865

6 September 1862: The District of Wisconsin was established in the Department of the Northwest, comprising the state of Wisconsin.

6 September 1862: Brigadier-General Washington Lafayette Elliott assumed command of the District of Wisconsin.

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

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

27 June 1865: The District of Wisconsin was discontinued.

Army of Arkansas

27 July 1863-1 August 1865

Frederick Steele 27 July 1863-21 December 1864

Joseph Jones Reynolds 22 December 1864-1 August 1865

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

25 July 1863: Major-General Frederick Steele assumed command of the Army of Arkansas.

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

6 January 1864: Major-General Frederick Steele retained command of the Army of Arkansas.

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

6 January 1864: Major-General Frederick Steele retained command of the Army of Arkansas.

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

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

27 June 1865: Major-General Joseph Jones Reynolds retained command of the Army of Arkansas.

1 August 1865: The Army of Arkansas was discontinued.

Army of the Border (Kansas)

14 October 1864-8 November 1864

Samuel Ryan Curtis 14 October 1864-8 November 1864

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

15 October 1864: Major-General Samuel Ryan Curtis assumed command of the Army of the Border.

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

Army of the Frontier

12 October 1862-7 August 1863

John McAllister Schofield 12 October 1862-19 November 1862

James Gilpatrick Blunt temporary 20 November 1862-28 December 1862

John McAllister Schofield 29 December 1862-29 March 1863

Francis Jay Herron 30 March 1863-7 August 1863

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

12 October 1862: Brigadier-General John McAllister Schofield assumed command of the Army of the Frontier.

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

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

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

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

Army of Kansas

16 August 1862-19 September 1862

James Gilpatrick Blunt 16 August 1862-19 September 1862

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

16 August 1862: Brigadier-General James Gilpatrick Blunt assumed command of the Army of Kansas.

19 September 1862: The Army of Kansas was discontinued.

Army of Western Missouri

3 December 1861-12 February 1862

John Pope 3 December 1861-12 February 1862

3 December 1861: The Army of Western Missouri was established in the District of Central Missouri.

3 December 1861: Brigadier-General John Pope assumed command of the Army of Western Missouri.

12 February 1862 The Army of Western Missouri was discontinued, and later incorporated into the Army of the Mississippi.

Army of Southeastern Missouri

3 November 1862-26 March 1863

John Wynn Davidson 3 November 1862-26 March 1863

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

3 December 1862: Brigadier-General John Wynn Davidson assumed command of the Army of Southeastern Missouri.

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

Army of Southwestern Missouri

1 October 1862-12 October 1862

John McAllister Schofield 1 October 1862-12 October 1862

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

1 October 1862: Brigadier-General John McAllister Schofield assumed command of the Army of Southwestern Missouri.

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

Army of the Southwest

25 December 1861-12 December 1862

Samuel Ryan Curtis 25 December 1861-29 August 1862

Frederick Steele 29 August 1862-6 October 1862

Eugene Asa Carr 17 October 1862-11 November 1862

Willis Arnold Gorman temporary 12 November 1862-12 December 1862

25 December 1861: The Army of the Southwest “Army of Southwest Missouri” was established in the District of Southwest Missouri.

25 December 1861: Brigadier-General Samuel Ryan Curtis assumed command of the Army of the Southwest.

29 August 1862: Brigadier-General Frederick Steele assumed command of the Army of the Southwest, succeeding Major-General Samuel Ryan Curtis.

19 September 1862: The Army of the Southwest transferred from the District of Southwest Missouri to the Department of the Missouri.

19 September 1862: Brigadier-General Frederick Steele retained command of the Army of the Southwest.

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

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

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

Army of the West

2 July 1861-10 August 1861

Nathaniel Lyon 2 July 1861-10 August 1861

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

2 July 1861: Brigadier-General Nathaniel Lyon assumed command of the Army of the West.

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

3 July 1861: Brigadier-General Nathaniel Lyon retained command of the Army of the West.

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

Western Army

24 September 1861-24 October 1861

John Charles Frémont 24 September 1861-24 October 1861

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

24 September 1861: Major-General John Charles Frémont assumed command of the Western Army.

24 October 1861: The Western Army was discontinued.

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.

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