Organized at Hartford August 23 1862. Left State for Washington , D. C., August 25. Attached to 2nd Brigade, 3rd Division, 2nd Army Corps, Army of the Potomac, to March, 1864. 3rd Brigade, 2nd Division, 2nd Arm y Corps, to May, 1865.
Service-Camp at Arlington, Va., till September 7, 1862. Moved to Rockville, Md., September 7-8. Battle of Antietam, Md., September 16-17. Moved to Harper's Ferry, West Virginia, September 22 and duty there till October 30. Reconnaissance to Charlestown October 16-17. Advance up Loudon Valley and movement to Falmouth, Virginia, October 30-November 17. Battle of Fredersicksburg December 12-15. Duty 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. Advance from the Rappahannock to the Rapidan September 13-17. Bristoe campaign October 9-22. Action at Bristoe Station October 14. Advance to line of the Rappahannock November 7-8. Mine Run Campaign November 26 - December 2. Att stevensburg, Virginai, till April, 1864. Demonstration on the Rapidan to the James May-June. Battles of the Wilderness May 5-7. Spottsylvania May 8-12. Laurel Hill May 8. Spottsylvania Court House May 12-21. Assault on the Salient, Spottsylvainia Court House May 12. North Anna River May 23-26. Line of the Pamunkey May 26-28. Totoptomoy May 28-31. Cold Harbor June 1-12. Before Petersburg June 16-18. Siege of Petersburg June 16, 1864, to April 2 1865. Jerusalem Plank Road June 22-23, 1864 Demonstration on north side of the James River July 27-29. Deep Bottom July 27-28. Strawberry Plaines, Deep Bottom, August 14-18. Ream's Stations August 25. Boydto Plank Road, Hatcher's Run October 27-28. Dabney's Mills February 5-7, 1865. Watkins's House March 325. Appomattox Campaign March 28-April 9. Crow's House March 31. Assault on and fall of Petersburg April 2. Sailor's Creek, April 6. High Bridge and Farmville April 7. Appomattox Court House April 9. Surrender of Lee and his army. At Burkesville till May 2. Moved to Washington, D. C., May 2-15. Grand Review May 23. Old members mustered out May 21, 1865. Veterans and recruits transferred to 2nd Connecticut Heavy Aritillery May 30, 1865.
Regiment lost during service 17 Officers and 188 Enlisted men killed and mortally wounded and 1 Officer and 191 Enlisted men by disease. Total 397.