The 4th Massachusetts Heavy Artillery lost 2 officers and 23 enlisted men to disease in the Civil War.
|August||Organized for one year’s service by consolidation of the 17th, 18th, 19th, 20th, 21st, 22nd, 23rd, 24th, 25th, 26th, 27th and 28th Unattached Companies Heavy Artillery.|
|November 12||Attached to 3rd Brigade, DeRussy’s Division, 22nd Army Corps, Dept. of Washington and garrison duty in the Defenses of Washington, south of the Potomac|
|June 17||Mustered out|