July 25 –
September 9
Organized at Litchfield
September 15 Left State for Washington, D.C. Attached to Slough’s Brigade, District of Alexandria, Defenses of Washington
January 12 Guard and patrol duty at Alexandria, Va. attached to Tyler’s Command, Artillery, District of Alexandria, Military District of Washington
April Attached to 2nd Brigade, DeRussy’s Division, 22nd Army Corps
May Garrison duty at Fort Worth
November At redoubts near Fort Lyon, Cos. B, F and G at Fort Ellsworth
November 23 Designation of Regiment changed to 2nd Connecticut Heavy Artillery