December 30th, 1864, the designation of the 3d Division, 16th Army
Corps, was changed to 2d Division, Detachment Army of the Tennessee,
Maj. Gen. A. J. Smith commanding; Brigadier Gen. Kenner Garrard
commanding the 2d Division.
February 22d, 1865, the designation of the Army of the Tennessee was
changed to the 16th Army Corps, and the 2d Division, Brig. Gen. Garrard
commanding, formerly the old 3d, 16th Army Corps, was thereafter known
as the 2d of the reorganized 16th Corps.
During the war the 21st Missouri was attached to the following
Divisions:
1st Brigade, 6th Division, Army of West Tennessee.
1st Brigade, 3d Division, 16th Army Corps.
1st Brigade, 2d Division, Detachment Army of the Tenn.
1st Brigade, 2d Division, 16th Army Corps.