The 21st New Jersey Infantry Regiment lost 1 officer and 20 enlisted men killed or mortally wounded and 1 officer and 30 enlisted men to disease during the Civil War.
|Organized at Trenton, N.J. under Colonel Gilliam Van Houten|
|September 15||Mustered in|
|September 16||Left State for Washington, D.C.|
|September 18||Moved to Frederick, Md. and Joined Army of the Potomac on battlefield of Antietam, Md. Attached to 3rd Brigade, 2nd Division, 6th Army Corps, Army of the Potomac|
|September-October||Duty at Hagerstown, Md., and guard duty at Dam No. 5|
|October 29-November 19||Movement to Falmouth, Va.|
Battle of Fredericksburg
|December 11||Cover laying of pontoons and Bowling Green Road in support of Weirs’ Maryland Battery.|
|January 20-24||“Mud March”|
|January-April||Duty near White Oak Church and constructing corduroy road below Fredericksburg|
|April 27-May 6||Chancellorsville Campaign|
|April 29-May 2||Operations at Franklin’s Crossing|
Battle of Maryes Heights, (Second Battle of Fredericksburg)
The regiment was on the left flank of the Union line, attacked by Early’s division in an hour and a half of severe fighting. Colonel Van Houten was mortally wounded and captured.
|June 19||Mustered out at Trenton, N. J.|