Union Wartime Organisation: Trans-Mississippi, Northwest and Frontier Theatre

Union Wartime Organisation

Trans-Mississippi, Northwest and Frontier Theatre

April 1861-June 1865

Summary

This theatre broadly covers the states of Arkansas, Iowa, Kansas, Missouri, Wisconsin, Minnesota, Nebraska, Indian Territory, and adjacent operational regions. Texas and Louisiana are described as part of the Gulf Coast Theatre.

At the outbreak of war, most of the region between the Mississippi River and the Rocky Mountains was under the control of the Department of the West. In July 1861, this was renamed as the Western Department and underwent a period of turmoil until its pro-Southern commander, Brigadier-General William Selby Harney, was supplanted. In the short term, Nathaniel Lyon provided bold leadership, from the headquarters at St Louis, Missouri, but the command was soon transferred to the prominent figurehead John Charles Frémont. By November, it was clear that Frémont was an ineffective, if not incompetent commander, and he was replaced by David Hunter in November 1861.

During this time, the Department absorbed the former Department of New Mexico to the west, giving it a confusing eastward and westward-facing responsibility. More importantly, the Western Department was also responsible for the strategically vital region around the confluence of the Missouri, Mississippi and Ohio Rivers. It became clear very quickly that the unwieldy and disparate Western Department had to be rationalised.

The leadership of this strategic focal point was assigned to Major-General Henry Wager Halleck. Halleck’s newly created Department of the Missouri directed its attention to these great rivers between November 1861 and September 1862. While minor operations continued west of the Mississippi, requiring the creation of numerous Districts, the more decisive action occurred east of and along the Mississippi, and along the Tennessee River.

Straddling two theatres and laying the foundations for subsequent advances between the Mississippi and the Appalachians, the Department of Missouri continued temporarily as a part of the Western Theatre until the gigantic Department of the Mississippi, the equivalent of a Military Division, was created under Halleck in March 1862. This was prompted by the realisation that unified planning and coordinated action were essential in the extensive Western Theatre.

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

In September 1862, the Department of the Missouri was reorganised and the Department of the Northwest was created to manage between them all operations in the Trans-Mississippi, Northwestern, and Frontier Theatre. Relevant territories were detached from the discontinued Department (Military Division) of the Mississippi and the Department of Kansas was discontinued, enabling a more coherent approach to command in the theatre west of the Mississippi.

The Department of the Northwest – led almost continually by Pope -dealt primarily with actions against Native Americans. The Department of the Missouri primarily prosecuted operations against the Confederates and their adherents west of the Mississippi under Curtis, Schofield, and finally Rosecrans.

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

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

By January 1865, the Confederates were incapable of extensive operations west of the Mississippi and Union attention shifted to the Gulf Coast and east of the Mississippi. When the Military Division of West Mississippi (Trans-Mississippi Military Division) was disbanded the Department of the Missouri and the Department of the Northwest were transferred to a new Military Division of the Missouri, with the Department of Kansas again being discontinued and its territory taken over by the Department of the Missouri.

The Department of Arkansas was more closely connected to the mission of the Military Divisions that oversaw the Gulf Coast states from Texas to Alabama, and so it only rejoined the Military Division of the Missouri briefly from March to May 1865.

The post-war reorganisation of June 1865 restored an approximation of the responsibilities of the pre-war Department of the West. The reformed Military Division of the Mississippi combined the Department of the Missouri, the Department of Arkansas, and a reorganised Department of the Ohio which replaced the discontinued Department of the Northwest.


Union High Command on April 12 1861 Trans-Mississippi, Northwest and Frontier Theatre

  • Department of the West: William Selby Harney

Department of the West

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

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

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

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

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

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

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

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

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

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

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

Army of the West

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

  • Nathaniel Lyon (July 2 1861-July 3 1861)

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

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


Western Department

Union High Command on July 3 1861 Trans-Mississippi, Northwest and Frontier Theatre

  • Western Department: Nathaniel Lyon interim John Charles Frémont awaited
    • Army of the West: Nathaniel Lyon

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

District of Ironton

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

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

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

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

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

September 1 1861: The District of Ironton was discontinued.

District of North Missouri

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

  • John Pope (July 29 1861-November 9 1861)

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

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

Southern District of New Mexico

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

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

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

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

District of Southeast Missouri

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

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

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

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

District of Western Kentucky

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

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

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

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

Army of the West

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

  • Nathaniel Lyon (July 3 1861-August 10 1861)

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

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

Western Army

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

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

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

October 24 1861: The Western Army was discontinued.


Department of Kansas

Union High Command on November 9 1861 Trans-Mississippi, Northwest and Frontier Theatre

  • Department of Kansas: David Hunter
  • Department of the Missouri: Henry Wager Halleck
    • District of Southeast Missouri: Ulysses Simpson Grant
    • District of Western Kentucky: Charles Ferguson Smith

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

  • David Hunter (November 9 1861-March 11 1862)

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

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

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

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

District of Kansas

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

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

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

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

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

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

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

Army of Kansas

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

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

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

September 19 1862: The Army of Kansas was discontinued.


Department of the Northwest

Union High Command on September 6 1862 Trans-Mississippi, Northwest and Frontier Theatre

  • Department (Military Division) of the Mississippi: Henry Wager Halleck
    • Department of the Missouri: Henry Wager Halleck
      • District of West Tennessee: Ulysses Simpson Grant
        • Sub-District of Jackson: John Alexander Logan
      • District of Missouri: John McAllister Schofield
      • District of Southwest Missouri: Egbert Benson Brown
        • Army of the Southwest: Frederick Steele
    • District of Northwest Missouri: Willard Preble Hall
    • District of Corinth: William Starke Rosecrans
    • Army of the Mississippi: William Starke Rosecrans
    • Army of West Tennessee: George Henry Thomas
  • Department of Kansas: James Gilpatrick Blunt
    • Army of Kansas: James Gilpatrick Blunt
  • Department of the Northwest: John Pope awaited
    • District of Wisconsin: Washington Lafayette Elliott

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

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

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

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

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

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

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

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

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

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

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

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

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

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

November 12 1864: The District of Iowa was discontinued.

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

District of Wisconsin

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

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

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

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

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

First District of the Northwest

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

  • John Cook (November 17 1862-June 1 1863)

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

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

Second District of the Northwest

(Established, November 17 1862-November 23 1862, discontinued, to District of Minnesota)

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

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

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

Third District of the Northwest

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

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

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

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

Fourth District of the Northwest

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

  • Francis Peteler (November 17 1862-November 27 1862)

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

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

District of Minnesota

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

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

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

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

District of Dakota

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

  • Alfred Sully (June 1 1863-December 4 1863)

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

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

District of Iowa

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

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

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

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

November 12 1864: The District of Iowa was discontinued.


Department of the Missouri

Union High Command on September 19 1862 Trans-Mississippi, Northwest and Frontier Theatre

  • Department of the Missouri: Henry Wager Halleck
    • District of Missouri: John McAllister Schofield
    • District of St Louis: John Wynn Davidson
    • District of Southwest Missouri: Egbert Benson Brown
      • Army of the Southwest: Frederick Steele
    • District of Northwest Missouri: Willard Preble Hall
    • Army of the Mississippi: William Starke Rosecrans
    • Army of West Tennessee: George Henry Thomas
  • Department of the Northwest: John Pope
    • District of Wisconsin: Washington Lafayette Elliott
  • District of Colorado: John Milton Chivington

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

District of St Louis

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

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

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

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

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

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

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

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

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

District of Southwest Missouri

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

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

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

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

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

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

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

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

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

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

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

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

District of Northwest Missouri

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

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

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

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

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

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

District of Missouri

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

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

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

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

District of Central Missouri

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

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

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

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

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

District of Northeast Missouri

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

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

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

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

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

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

District of Colorado

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

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

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

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

District of Colorado Territory

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

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

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

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

District of Eastern Arkansas

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

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

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

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

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

District of Nebraska Territory

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

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

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

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

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

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

District of Rolla

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

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

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

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

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

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

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

District of the Border

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

  • Thomas Ewing (June 9 1863-January 1 1864)

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

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

District of the Frontier

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

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

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

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

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

District of Southeast Missouri

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

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

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

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

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

District of North Missouri

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

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

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

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

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

District of Northern Arkansas

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

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

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

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

Army of the Southwest

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

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

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

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

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

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

Army of Southwestern Missouri

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

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

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

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

Army of the Frontier

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

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

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

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

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

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

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

Army of Southeastern Missouri

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

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

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

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

Army of Arkansas

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

  • Frederick Steele (July 27 1863-January 6 1864)

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

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


Department of Kansas

Union High Command on January 1 1864 Trans-Mississippi, Northwest and Frontier Theatre

  • Department of Kansas: Samuel Ryan Curtis awaited
    • District of Nebraska Territory: Thomas Jefferson McKean
    • District of the Border: Thomas Ewing
  • Department of the Missouri: John McAllister Schofield
    • District of St Louis: vacant
    • District of Southwest Missouri: John Benjamin Sanborn
    • District of Northeast Missouri: Thomas Jefferson McKean
    • District of North Missouri: Odon Guitar
    • District of Central Missouri: Egbert Benson Brown
    • District of Rolla: Thomas Alfred Davies
    • District of Northern Arkansas: Robert Ramsey Livingston
    • District of the Frontier: James Gilpatrick Blunt
    • Army of Arkansas: Frederick Steele
  • Department of the Northwest: John Pope
    • District of Minnesota: Henry Hastings Sibley
    • District of Wisconsin: Thomas Church Haskell Smith
    • District of Iowa: Alfred Sully

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

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

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

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

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

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

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

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

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

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

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

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

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

District of Nebraska Territory

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

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

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

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

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

District of the Border

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

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

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

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

January 30 1865: The District of the Border was discontinued

District of the Frontier Kansas

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

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

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

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

District of Colorado Territory

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

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

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

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

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

District of North Kansas

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

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

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

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

District of South Kansas

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

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

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

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

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

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

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

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

District of the Upper Arkansas

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

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

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

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

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

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

Army of the Border

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

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

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

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


Department of Arkansas

Union High Command on January 6 1864 Trans-Mississippi, Northwest and Frontier Theatre

  • Department of Arkansas: Frederick Steele
    • District of Eastern Arkansas: Napoleon Bonaparte Buford
    • District of Northern Arkansas: Robert Ramsey Livingston
    • District of the Frontier (Arkansas): James Gilpatrick Blunt
    • Army of Arkansas: Frederick Steele
      • VII Corps Arkansas: Frederick Steele
  • Department of Kansas: Samuel Ryan Curtis awaited
    • District of Nebraska Territory: Thomas Jefferson McKean
    • District of the Frontier (Kansas): John Milton Thayer
    • District of the Border: William Russell Judson
  • Department of the Missouri: John McAllister Schofield
    • District of St Louis: vacant
    • District of Southwest Missouri: John Benjamin Sanborn
    • District of Northeast Missouri: Thomas Jefferson McKean
    • District of North Missouri: Odon Guitar
    • District of Central Missouri: Egbert Benson Brown
    • District of Rolla: Thomas Alfred Davies
  • Department of the Northwest: John Pope
    • District of Minnesota: Henry Hastings Sibley
    • District of Wisconsin: Thomas Church Haskell Smith
    • District of Iowa: Alfred Sully

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

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

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

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

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

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

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

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

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

District of the Frontier Arkansas

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

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

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

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

District of Northern Arkansas

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

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

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

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

District of the Frontier

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

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

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

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

District of Eastern Arkansas

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

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

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

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

Army of Arkansas

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

  • Frederick Steele (January 6 1864-May 7 1864)

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

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

VII Corps Arkansas

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

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

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

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

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



Military Division of the Missouri

Union High Command on January 30 1865 Trans-Mississippi, Northwest and Frontier Theatre

  • Military Division of West Mississippi: Edward Richard Sprigg Canby
    • Department of Arkansas: Joseph Jones Reynolds
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Little Rock: Eugene Asa Carr
      • District of the Frontier: John Milton Thayer
      • Army of Arkansas: Joseph Jones Reynolds
        • VII Corps Arkansas: Joseph Jones Reynolds
    • Department of the Gulf: Stephen Augustus Hurlbut
      • District of Baton Rouge and Port Hudson: George Leonard Andrews
        • Sub-District of Baton Rouge: Joseph Bailey
        • Sub-District of Port Hudson: Charles Wilson Drew
      • District of La Fourche: Robert Alexander Cameron
      • District of Morganza: Daniel Ullmann
      • District of Carrollton: Nelson Viall
      • District of West Florida and South Alabama: Gordon Granger
        • Sub-District of West Florida: Thomas Jefferson McKean
      • District of Key West and Tortugas: John Newton
      • Defences of New Orleans: Thomas West Sherman
      • Army of the Gulf: Stephen Augustus Hurlbut temporary
  • Military Division of the Missouri: John Pope awaited
    • Department of the Missouri: Grenville Mellen Dodge
      • District of St Louis: George Day Wagner
      • District of Southwest Missouri: John Benjamin Sanborn
      • District of North Missouri: Clinton Bowen Fisk
      • District of Central Missouri: John Finis Philips
      • District of Rolla: Egbert Benson Brown
      • District of the Upper Arkansas: James Hobart Ford
      • District of North Kansas: Thomas Alfred Davies
      • District of South Kansas: James Gilpatrick Blunt
      • District of Nebraska Territory: Robert Byington Mitchell
      • District of Colorado Territory: John Milton Chivington
    • Department of the Northwest: John Pope interim Samuel Ryan Curtis awaited
      • District of Minnesota: Henry Hastings Sibley
      • District of Wisconsin: Thomas Church Haskell Smith

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

  • John Pope (January 30 1865-June 27 1865)

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

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

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

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

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

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

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


Department of the Missouri

Union High Command on January 30 1865 Trans-Mississippi, Northwest and Frontier Theatre

  • Military Division of West Mississippi: Edward Richard Sprigg Canby
    • Department of Arkansas: Joseph Jones Reynolds
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Little Rock: Eugene Asa Carr
      • District of the Frontier: John Milton Thayer
      • Army of Arkansas: Joseph Jones Reynolds
        • VII Corps Arkansas: Joseph Jones Reynolds
    • Department of the Gulf: Stephen Augustus Hurlbut
      • District of Baton Rouge and Port Hudson: George Leonard Andrews
        • Sub-District of Baton Rouge: Joseph Bailey
        • Sub-District of Port Hudson: Charles Wilson Drew
      • District of La Fourche: Robert Alexander Cameron
      • District of Morganza: Daniel Ullmann
      • District of Carrollton: Nelson Viall
      • District of West Florida and South Alabama: Gordon Granger
        • Sub-District of West Florida: Thomas Jefferson McKean
      • District of Key West and Tortugas: John Newton
      • Defences of New Orleans: Thomas West Sherman
      • Army of the Gulf: Stephen Augustus Hurlbut temporary
  • Military Division of the Missouri: John Pope awaited
    • Department of the Missouri: Grenville Mellen Dodge
      • District of St Louis: George Day Wagner
      • District of Southwest Missouri: John Benjamin Sanborn
      • District of North Missouri: Clinton Bowen Fisk
      • District of Central Missouri: John Finis Philips
      • District of Rolla: Egbert Benson Brown
      • District of the Upper Arkansas: James Hobart Ford
      • District of North Kansas: Thomas Alfred Davies
      • District of South Kansas: James Gilpatrick Blunt
      • District of Nebraska Territory: Robert Byington Mitchell
      • District of Colorado Territory: John Milton Chivington
    • Department of the Northwest: John Pope interim Samuel Ryan Curtis awaited
      • District of Minnesota: Henry Hastings Sibley
      • District of Wisconsin: Thomas Church Haskell Smith

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

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

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

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

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

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

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

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

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

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

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

District of St Louis

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

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

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

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

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

District of Southwest Missouri

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

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

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

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

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

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

District of Central Missouri

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

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

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

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

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

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

District of Rolla

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

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

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

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

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

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

District of North Missouri

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

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

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

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

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

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

District of Colorado Territory

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

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

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

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

District of Nebraska Territory

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

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

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

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

District of North Kansas

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

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

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

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

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

District of South Kansas

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

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

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

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

District of the Upper Arkansas

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

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

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

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

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

District of Utah

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

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

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

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

District of the Plains

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

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

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

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

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


Department of the Northwest

Union High Command on January 30 1865 Trans-Mississippi, Northwest and Frontier Theatre

  • Military Division of West Mississippi: Edward Richard Sprigg Canby
    • Department of Arkansas: Joseph Jones Reynolds
      • District of Eastern Arkansas: Napoleon Bonaparte Buford
      • District of Little Rock: Eugene Asa Carr
      • District of the Frontier: John Milton Thayer
      • Army of Arkansas: Joseph Jones Reynolds
        • VII Corps Arkansas: Joseph Jones Reynolds
    • Department of the Gulf: Stephen Augustus Hurlbut
      • District of Baton Rouge and Port Hudson: George Leonard Andrews
        • Sub-District of Baton Rouge: Joseph Bailey
        • Sub-District of Port Hudson: Charles Wilson Drew
      • District of La Fourche: Robert Alexander Cameron
      • District of Morganza: Daniel Ullmann
      • District of Carrollton: Nelson Viall
      • District of West Florida and South Alabama: Gordon Granger
        • Sub-District of West Florida: Thomas Jefferson McKean
      • District of Key West and Tortugas: John Newton
      • Defences of New Orleans: Thomas West Sherman
      • Army of the Gulf: Stephen Augustus Hurlbut temporary
  • Military Division of the Missouri: John Pope awaited
    • Department of the Missouri: Grenville Mellen Dodge
      • District of St Louis: George Day Wagner
      • District of Southwest Missouri: John Benjamin Sanborn
      • District of North Missouri: Clinton Bowen Fisk
      • District of Central Missouri: John Finis Philips
      • District of Rolla: Egbert Benson Brown
      • District of the Upper Arkansas: James Hobart Ford
      • District of North Kansas: Thomas Alfred Davies
      • District of South Kansas: James Gilpatrick Blunt
      • District of Nebraska Territory: Robert Byington Mitchell
      • District of Colorado Territory: John Milton Chivington
    • Department of the Northwest: John Pope interim Samuel Ryan Curtis awaited
      • District of Minnesota: Henry Hastings Sibley
      • District of Wisconsin: Thomas Church Haskell Smith

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

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

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

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

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

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

District of Wisconsin

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

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

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

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

June 27 1865: The District of Wisconsin was discontinued.

District of Minnesota

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

  • John Cook (January 30 1865-June 27 1865)

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

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


Department of Arkansas

Union High Command on March 21 1865 Trans-Mississippi, Northwest and Frontier Theatre

  • Military Division of the Missouri: John Pope
    • Department of the Missouri: Grenville Mellen Dodge
      • District of St Louis: George Day Wagner
      • District of Southwest Missouri: John Benjamin Sanborn
      • District of North Missouri: Clinton Bowen Fisk
      • District of Central Missouri: John McNeil
      • District of Rolla: John Morrill
      • District of the Upper Arkansas: James Hobart Ford
      • District of North Kansas: Thomas Alfred Davies
      • District of South Kansas: James Gilpatrick Blunt
      • District of Nebraska Territory: Robert Byington Mitchell
      • District of Colorado Territory: John Milton Chivington
      • District of Utah: Patrick Edward Connor
    • Department of Arkansas: Joseph Jones Reynolds
      • District of Eastern Arkansas: Alexander McDowell McCook
      • Army of Arkansas: Joseph Jones Reynolds
        • VII Corps Arkansas: Joseph Jones Reynolds
    • Department of the Northwest: Samuel Ryan Curtis
      • District of Minnesota: Henry Hastings Sibley
      • District of Wisconsin: Thomas Church Haskell Smith

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

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

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

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

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

District of Eastern Arkansas

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

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

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

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

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

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

District of South Kansas

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

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

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

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

Army of Arkansas

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

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

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

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

VII Corps Arkansas

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

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

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

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


Union High Command on June 27 1865 Trans-Mississippi, Northwest and Frontier Theatre

  • Military Division of the Mississippi: William Tecumseh Sherman
    • Army of the Cumberland: George Henry Thomas
    • Department of the Ohio: Edward Otho Cresap Ord awaited
    • Department of the Missouri: Grenville Mellen Dodge interim John Pope awaited
      • District of Minnesota: Henry Hastings Sibley
      • District of St Louis: James Alexander Williamson
      • District of Southwest Missouri: Thomas Jefferson McKean
      • District of North Missouri: George Spalding
      • District of Central Missouri: John Lourie Beveridge
      • District of Rolla: John Morrill
      • District of the Upper Arkansas: James Hobart Ford
    • Department of Arkansas: Joseph Jones Reynolds
      • Army of Arkansas: Joseph Jones Reynolds
        • VII Corps Arkansas: Joseph Jones Reynolds
    • Army of the Tennessee: John Alexander Logan
        • XV Corps Tennessee: William Babcock Hazen
        • XVII Corps Tennessee: Mortimer Dormer Leggett temporary
    • XIV Corps Mississippi: Jefferson Columbus Davis
    • VIII Corps Middle: Lewis Wallace
  • Military Division of the Gulf: Philip Henry Sheridan
    • Department of Texas: Horatio Gouverneur Wright awaited
      • Central District of Texas: David Sloane Stanley
      • Eastern District of Texas: Joseph Anthony Mower
      • Western District of Texas: Frederick Steele
    • Department of Louisiana: Edward Richard Sprigg Canby awaited
      • District of Baton Rouge: John Giles Fonda
      • Eastern District of Louisiana: Thomas West Sherman
      • Western District of Louisiana: John Parker Hawkins
    • Department of Mississippi: Henry Warner Slocum awaited
      • Northern District of Mississippi: Peter Joseph Osterhaus
      • Southern District of Mississippi: John Wynn Davidson
      • Western District of Mississippi: Jasper Adalmorn Maltby
    • Department of Florida: John Newton interim John Gray Foster awaited
    • XIII Corps Gulf: Gordon Granger
    • XVI Corps Gulf: Andrew Jackson Smith

 

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