HISTORICAL NOTES:
The 12th Regiment New Hampshire Infantry was organized at Concord and mustered in on September 10, 1862. The length of service was for 2 years and 8 months. They were mustered out on the 21st of June, 1865.
Regiment lost during service 11 Officers and 170 Enlisted men killed and mortally wounded and 1 Officer and 138 Enlisted men by disease. Total 320.
OFFICERS:
Colonel Joseph Haydn Potter
Colonel Thomas E. Barker
Lieutenant Colonel John F. Marsh
Lieutenant Colonel George D. Savage
Captain John F. Langley - commanded at the battle of Gettysburg, July 2, 1863; wounded in action
Captain Thomas E. Barker - commanded at the battle of Gettysburg, July 3, 1863
ASSIGNMENTS:
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 Virgin!a and North Carolina, to December, 1864. 2nd Brigade. 3rd Division, 24th Army Corps, Dept. of Virginia, to June, 1865.
SERVICE:
Duty in the Defenses of Washington until October, 1862. Moved to Point of Rocks, Md., October 18; thence to Pleasant Valley October 19. Movement to Warrenton, Va., October 24-November 16, and to Falmouth November 18-24. Battle of Fredericksburg December 12-15. Burnside's 2nd Campaign ("Mud March") January 20-24, 1863. Duty at Falmouth until April. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 1-3. Ordered to Point Lookout, Md., July 26, and duty there guarding prisoners until April 7, 1864. Moved to Yorktown April 7, thence to Williamsburg. Butler's operations on south side of the James River and against Petersburg and Richmond May 4-28. Swift Creek (or Arrowfield Church) May 9-10. Operations against Fort Darling May 12-16. Battle of Drewry's Bluff May 14-16. Bermuda Hundred May 16-27. Moved to White House, thence to Cold Harbor, May 27-31. Battles about Cold Harbor June 1-12. Before Petersburg June 15-19. Siege of Petersburg and Richmond June 16, 1864, to April 2, 1865. Mine Explosion, Petersburg, July 30, 1864 (Reserve). Duty on the Bermuda Front August 26 to December, and in trenches before Richmond until April, 1865. Occupation of Richmond April 3. Guard and Provost duty at Manchester until June. Mustered out June 21, 1865.
ROSTERS:
The composite rosters of this unit contains the names of 1894 men.
Company A - Belknap County, Strafford County, and Grafton County
Company B - Belknap County
Company C - Grafton County, Merrimack County, and Belknap County
Company D - Belknap County, Grafton County and Merrimack County
Company E - Grafton County and Belknap County
Company F - Merrimack County and Rockingham County
Company G - Belknap County and Carroll County
Company H - Belknap County
Company I - unknown counties, probably from Belknap County and borderng towns
HISTORICAL NOTES: