Organized in mid-1862.
Surrendered by Lt. Gen. Richard Taylor, commanding the Department of Alabama, Mississippi, and East Louisiana, at Meridian, Mississippi on May 4, 1865.
July-August 1862: 3rd Sub-district, District of the Mississippi, Department #2
September 1862: 2nd Sub-district, District of the Mississippi, Department #2
September-October 1862: Cavalry Brigade, 1st Division, District of the Mississippi, Army of West Tennessee, Department #2
October 1862: Cavalry Brigade, 1st Division, District of the Mississippi, Army of West Tennessee, Department of Mississippi and East Louisiana
November-December 1862: Cavalry, 1st Corps, Army of West Tennessee, Department of Mississippi and East Louisiana
December 1862-January 1863: Cavalry Corps, Army of North Mississippi, Department of Mississippi and East Louisiana
January-February 1863: Cosby's Brigade, Jackson's Division, Van Dorn's Cavalry Corps, Department of Mississippi and East Louisiana
February 1863: Cosby's Brigade, Martin's Division, Van Dorn's Cavalry Corps, Department of Mississippi and East Louisiana
March-May 1863: Cosby's Brigade, Martin's Division, Van Dorn's Cavalry Corps, Army of Tennessee
June-July 1863: Cosby's Brigade, Jackson's Cavalry Division, Army of the West, Trans-Mississippi Department
July-August 1863: Cosby's Brigade, Jackson's Cavalry Division, Department of Mississippi and East Louisiana
August-September 1863: Jackson's Brigade, Jackson's Division, Lee's Cavalry Corps, Department of Mississippi and East Louisiana
September-December 1863: Ross' Brigade, Jackson's Division, Lee's Cavalry Corps, Department of Mississippi and East Louisiana
December 1863-January 1864: Starke's-Cosby's Brigade, Jackson's Division, Lee's Cavalry Corps, Department of Mississippi and East Louisiana
January-May 1864: Cosby's-Starke's Brigade, Jackson's Division, Department of Alabama, Mississippi, and East Louisiana
May-July 1864: Starke's-Armstrong's Brigade, Jackson's Cavalry Division, Army of Mississippi
July 1864-January 1865: Armstrong's Brigade, Jackson's Cavalry Division, Army of Tennessee
January-February 1865: Armstrong's Brigade, Jackson's Cavalry Division, Forrest's Cavalry Corps, Department of Alabama, Mississippi, and East Louisiana
February-May 1865: Armstrong's Brigade, Chalmer's Cavalry Division, Forrest's Cavalry Corps, Department of Alabama, Mississippi, and East Louisiana