1st Connecticut Heavy Artillery Regiment

Artillery defenses Alexandria Military District of Washington, to February 1863.

2nd Brigade, DeRussy's Division, defenses south of the Potomac River, XXII Corps, to May 1863.

(Batteries B and M attached to Artillery Reserve, Army of the Potomac, October 1862 to January 1864.)

4th Brigade, DeRussy's Division, XXII Corps, Department of Washington, to August 1865.

Ordered to the Peninsula, Va., in charge of the siege train, Army of the Potomac, April 2.

Batteries B and M detached with the Army of the Potomac, participating in the Battle of Fredericksburg, December 12–15.

Engaged in fatigue duty and as garrison for batteries and forts on the Bermuda front and lines before Petersburg during siege operations against Petersburg and Richmond, May 1864 to April 1865.

Occupy Fort Converse, Redoubt Dutton, Batteries Spofford, Anderson, Pruyn, and Perry on the Bermuda front, and Forts Rice, Morton, Sedgwick, and McGilvrey, and Batteries 1, 2, 3, 4, 5, 9, 10, 11, 12, 14, 15, 17, 18, 20, Burpee, Drake, and Sawyer, on the Petersburg front, and at Dutch Gap, north of the James River.

Repulse of rebel fleet at Fort Brady on James River January 23–24, 1865.

Expedition to Fort Fisher, North Carolina, January 3–15, 1865 (Batteries B, G, and L).