3rd Regiment, Missouri Infantry (Union)

Organized at St. Louis, Mo., September 3, 1861, to January 18, 1862. Attached to 2nd Brigade, Army of Southwest Missouri, to February, 1862. Unassigned, Army of Southwest Missouri, to May, 1862. 3rd Division, Army of Southwest Missouri, to July, 1862. District of Eastern Arkansas, Dept. of Missouri, to November, 1862. 1st Brigade, 1st Division, District of Eastern Arkansas, to December, 1862. 1st Brigade, 11th Division, Right Wing 13th Army Corps (Old), Dept. of the Tennessee, to December, 1862. 2nd Brigade, 4th Division, Sherman's Yazoo Expedition, to January, 1863. 2nd Brigade, 1st Division, 15th Army Corps, Army of the Tennessee, to September, 1863. 1st Brigade, 1st Division, 15th Army Corps, to December, 1863. 3rd Brigade, 1st Division, 15th Army Corps, to November, 1864.