Organized at Worcester and mustered in August 30, 1862. Left State for Washington, D. C., September 2, thence moved to Leesburg, Va., September 9, and to Pleasant Valley. Attached to 3rd Brigade, 1st Division, 9th Army Corps, Army Potomac, to April, 1863, and Dept. Ohio, to June, 1863. 1st Brigade, 1st Division, 9th Army Corps, Dept. Ohio, and Army Tennessee, to August, 1863, and Dept. Ohio, to April, 1864. 1st Brigade, 2nd Division, 9th Army Corps, Army Potomac, to June, 1865.