The 1st Connecticut Heavy Artillery Regiment lost 2 officers and 49 enlisted men killed or mortally wounded and 4 officers and 172 enlisted men to disease during the Civil War.
|January 2||Organized at Washington, D.C., from 4th Connecticut Infantry Regiment|
|January -March||Duty at Fort Richardson, defenses of Washington, D.C. attached to Military District of Washington|
|April 2||Ordered to the Peninsula, Va., in charge of siege train Army Potomac|
|April 12-May 4||Siege of Yorktown. Attached to 3rd Brigade, 2nd Division, 5th Army Corps, Army Potomac|
|May 27||Battle of Hanover C. H.|
|May 27-29||Operations about Hanover C. H.|
|June 25-July 1||Seven days before Richmond|
|June 27||Gaines’ Mill|
|July 1||Malvern Hill|
|July||At Harrison’s Landing. Assigned to Siege artillery, Army Potomac|
|August 16-27||Moved to Alexandria, Va. Duty in the defenses of Washington, D.C. as garrison at Fort Richardson. Assigned to Artillery defenses Alexandria, Military District of Washington.
Companies B and M detached to Artillery Reserve, Army Potomac. Each battery was equipped with four 4.5″ Siege Rifles.
|Dec. 12-15||Battle of Fredericksburg (Detatched Companies B & M)|
|February||Assigned to artillery defenses of Alexandria, 22nd Corps|
|April||Assigned to 2nd Brigade, DeRussy’s Division, defenses south of the Potomac, 22nd Corps|
|April 27-May 6||Chancellorsville Campaign (Detatched Companies B & M)|
|May||Assigned to 3rd Brigade, DeRussy’s Division, 22nd Corps|
|May 1-5||Battle of Chancellorsville (Detatched Companies B & M)|
|June 12||Stafford Heights (Detatched Companies B & M)|
|July 1-3||Battle of Gettysburg
Detatched Companies B & M were not at Gettysburg, being held in reserve due to the mobile nature of the campaign. General Hunt afterwards regretted not having the heavy guns, which he felt could have done good service.
|October 9-22||Bristoe Campaign (Detatched Companies B & M)|
|November 7-8||Advance to line of the Rappahannock (Detatched Companies B & M)|
|November 8||Brandy Station (Detatched Companies B & M)|
|November 26-December 2||Mine Run Campaign (Detatched Companies B & M)|
|December||Assigned to 2nd Brigade, DeRussy’s Division, 22nd Corps|
|January||Regiment reunited in the defenses of Washington|
|March||Assigned to 4th Brigade, DeRussy’s Division, 22nd Army Corps|
|May 13||Regiment ordered to Bermuda Hundred, Va. 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. Assigned to Siege artillery, Dept. of Virginia and North Carolina.
Occupied 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.
|June 2 and 21||Assaults on Fort Dutton (Company L)|
|May 18, 19, 20, 21, 25, 27, 30, & 31||Attacks on the lines|
|June 1, 2, 5, 9, 18, 20 & 23||Attacks on the lines|
|July 30||Petersburg Mine explosion|
|August 25||Attacks on the lines|
|November 17, 18 & 28||Attacks on the lines|
|January 3-15||Expedition to Fort Fisher, N. C. (Companies B, G & L)|
|January 23-24||Repulse of rebel fleet at Fort Brady on James River|
|January 15||Capture of Fort Fisher (Companies B, G & L)|
|April 2||Assaults on and fall of Petersburg, Va.|
|April-June||Duty in the Dept. of Va.|
|July 11||Moved to Washington, D.C., and duty in the defenses of that city. Attached to 4th Brigade, DeRussy’s Division, 22nd Army Corps, Dept. of Washington|
|August||Attached to 3rd Brigade, Dept. of Washington|
|September 25||Mustered out|