| Field Officers | 21 |
| Line Officers | 78 |
| Privates and Non-Commissioned Officers, | 1580 |
| —— | |
| Grand total | 1679 |
| Losses during the war from all causes | 834 |
| —— | |
| Survivors on April 19th, 1866 | 845 |
The above figures are not claimed to be absolutely correct. There is a great lacking of data in the written records of the regiment and reports of officers, but they are compiled by those familiar with the history of the regiment, from its organization to its discharge, and after great pains and labor they give them, believing that they are at least very nearly true.
DATES OF CHANGES IN NUMBERS OF DIVISIONS.
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.