Organized at Fair Haven and mustered in March 8, 1864. Left State for Annapolis, Md., March 19. Moved to Beaufort, S. C., April 8-13, and duty there till August 8. Attached to District of Beaufort, Dept. of the South, April to August 1864. 1st Brigade, 3rd Division, 10th Army Corps, Army of the James, Dept. Virginia and North Carolina, to December, 1864. 2nd Brigade, 3rd Division, 25th Army Corps, to January 1865. 2nd Brigade, 1st Division, 25th Army Corps, to April 1865. District of St. Marys, 22nd Army Corps, Dept. of Washington, to May 1865. 2nd Brigade, 1st Division, 25th Army Corps, Dept. of Texas, to October 1865.
Moved from Beaufort, S.C., to Bermuda Hundred, Va., August 8-13, 1864.
Siege operations against Petersburg and Richmond August 13, 1864, to April 2, 1865.
Demonstration on North Side of the James August 13-20, 1864.
Deep Bottom, Strawberry Plains, August 14-18.
Duty in the trenches before Petersburg August 25-September 24.
New Market Heights and Fort Harrison September 28-29.
Chaffin's Farm September 29-30.
Darbytown Road October 13.
Battle of Fair Oaks October 27-28.
Duty in trenches before Richmond till April 1865.
Occupation of Richmond April 3. (First Infantry Regiment to enter city.)
Moved to City Point April 18, thence to Point Lookout, Md., and duty there guarding prisoners till May 28.
Moved to City Point May 28-30, thence sailed for Texas June 10, arriving at Brazos, Santiago, July 3.
March to Brownsville and duty there till October. Mustered out October 24, 1865.
At New Orleans October 27-November 11.
Honorably discharged at New Haven, Conn., November25, 1865.
Regiment lost during service 1 Officer and 44 Enlisted men killed and mortally wounded and 1 Officer and 152 Enlisted men by disease. Total 198.