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.