Organized at Camp Cameron, Cambridge, June 29, 1861. Left State for Old Point Comfort, Va., August 17. Attached to Fortress Monroe, Dept. of Virginia, to May, 1862. 1st Brigade, 1st Division, Dept. of Virginia, to June, 1862. 1st Brigade, 2nd Division, 3rd Army Corps, Army of the Potomac, to March, 1864. 1st Brigade, 4th Division, 2nd Army Corps, to May, 1864. 3rd Brigade, 3rd Division, 2nd Army Corps, to July, 1864.

SERVICE:
Garrison duty at Fortress Monroe, Va., September 1, 1862, to May 8, 1862. Occupation of Norfolk May 10. Moved to Suffolk May 17, and joined Army of the Potomac at Fair Oaks Juhe 13. Nine Mile Road, near Richmond, June 18. Seven days before Richmond June 25-July 1. Oak Grove, near Fair Oaks, June 25. White Oak Swamp and Glendale June 30. Malvern Hill July 1 and August 5. Duty at Ball's Bluff till August 15. Movement to Fortress Monroe, thence to Centreville August 15-26. Bristoe Station, Kettle Run, August 27. Battles of Manassas August 29; Bull Run August 30; Chantilly September 1. Duty at Fort Lyon and at Fairfax Station, Defences of Washington, till October 30, and at Munson's Hill till November 2. At Fairfax station till November 25. Operations on Orange & Alexandria Railroad November 10-12. Rappahannock Campaign December, 1862, to June, 1863. Battle of Fredericksburg, Va., December 12-15. "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, Pa., July 1-3. Wapping Heights, Va., July 23. Bristoe Campaign October 9-22. Advance to the Rappahannock November 7-8. Kelly's Ford November 7. Mine Run Campaign November 26-December 2. Mine Run November 27. Demonstration on the Rapidan February 6-7, 1864. Duty near Brandy Station till May, 1864. Rapidan Campaign May-June. Battles of the Wilderness May 5-7; Spottsylvania May 8-12; Spottsylvania Court House May 12-21. Assault on the Salient, Spottsylvania Court House, May 12. Harris' Farm, Fredericksburg Road, May 19. North Anna River May 23-26. Ox Ford May 23-24. On line of the Pamunkey May 26-28. Totopotomoy May 28-31. Cold Harbor June 1-12. Before Petersburg June 16-18. Siege of Petersburg June 16-July 11. Jerusalem Plank Road June 22-23. Left front for muster out July 11. Veterans and Recruits transferred to the 11th Massachusetts Infantry. Mustered out July 27, 1864.
Regiment lost during service 16 Officers and 134 Enlisted men killed and mortally wounded and 2 Officers and 93 Enlisted men by disease. Total 245.