OVERVIEW: Organized as a Battalion of 6 Companies for garrison duty at Fort Warren, Boston Harbor, November 25, 1861. Duty at Fort Warren till May, 1862. Moved to Washington, D. C., May 26-28. Attached to Military district of Washington to July, 1862. 1st Brigade, 1st Division, 5th Army Corps, Army of the Potomac, to September, 1862. 2nd Brigade, 1st Division, 5th Army Corps, to October, 1864.

SERVICE:
-At Capital Hill, Defences of Washington, till June 24, 1862. Moved to Ball's Bluff, Va, June 25-July 3. (1 Co. join at Ball's Bluff July 23, and 3 Cos. at Minor's Hill, Va., September 4, 1862.) At Ball's Bluff till August 15. Movement to Fortress Monroe, thence to Centreville August 15-28. Pope's Campaign in Northern Virginia August 28-September 2. Battle of Bull Run August 30. Battle of Antietam, Md., September 16-17. Blackford's Ford September 19. At Sharpsburg, Md., till October 30. Reconnoissance to Smithfield, W, Va, October 16-17. Movement to Falmouth October 30-November 19. Battle of Fredericksburg, Va., December 12-15. Expedition to Richards' and Ellis Fords December 29-30. "Mud March" January 20-24, 1863. At Falmouth till April 27. Chancellorsville Campaign April 27-May 6. Battle of Chancellorsville May 1-5. Gettysburg (Pa.) Campaign June 11-July 24. Battle of Gettysburg July 1-4. Pursuit of Lee July 5-24. At Warrenton and Beverly Ford till September 17. At Culpeper till October 11. Bristoe Campaign October 11-22. Advance to line of the Rappahannock November 7-8. Mine Run Campaign November 26-December 2. At Bealeton, Va., till May, 1864. Campaign from the Rapidan to the James May-June. Battles of the Wilderness May 5-7; Laurel Hill May 8; Spottsylvania May 8-12; Spottsylvania Court House May 12-21. Assault on the Salient May 12. North Anna River May 23-26. Jericho Mills May 23. On line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Bethesda Church June 1-3. Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2, 1865. Mine Explosion, Petersburg, July 30, 1864 (Reserve). Six-Mile House, Weldon Railroad, August 18-21. Peebles' Farm September 29-October 2. Boydton Plank Road, Hatcher's Run, October 27-28. Expedition to Weldon Railroad December 7-12. Dabney's Mills, Hatcher's Run, February 5-7, 1865. Appomattox Campaign March 28-April 9. Lewis Farm, near Gravelly Run, March 29. White Oak Road March 31. Five Forks April 1. Appomattox Court House April 9. Surrender of Lee and his army. March to Washington, D. C., May 1-12. Grand Review May 23. Duty at Washington till June 29. Mustered out June 29, and discharged July 11, 1865.
Regiment lost during service 5 Officers and 139 Enlisted men killed and mortally wounded and 2 Officers and 143 Enlisted men by disease. Total 289.