12th New Hampshire Volunteer Infantry

Organization:

Organized at Concord and mustered in September 10, 1862. Left State for Washington, D.C., September 27, 1862. Attached to Casey's Division, Military District of Washington, to December, 1862. 2nd Brigade, 3rd Division, 3rd Army Corps, Army of the Potomac, to June, 1863. 1st Brigade, 2nd Division, 3rd Army Corps, Army of the Potomac, to July, 1863. Marston's Command, Point Lookout, Md., District of St. Mary's, to April, 1864. 2nd Brigade, 2d Division, 18th Army Corps, Dept. of Virginia and North Carolina, to December, 1864. 2nd Brigade. 3rd Division, 24th Army Corps, Dept. of Virginia, to June, 1865.

The 12th was involved in 13 engagements.
The highest casualties came at Chancellorsville -72, Cold Harbor -63, Gettysburg -26.