The 33rd New Jersey Infantry Regiment was organized at Newark, New Jersey for three years service and mustered in September 3, 1863 under the command of Colonel George W. Mindil.
The regiment was attached to 1st Brigade, 2nd Division, XI Corps, Army of the Potomac, to October 1863, and Army of the Cumberland to April 1864.
The 33rd New Jersey Infantry mustered out of service July 17, 1865, at Washington, D.C. Left New Jersey for Washington, D.C., September 8, 1863, then moved to Warrenton, Va., September 13–19.
Movement to Bridgeport, Ala., September 26–30, 1863, then moved to mouth of Battle Creek, October 18, and duty there guarding bridges until November 4.
March to relief of Knoxville November 28 – December 17.
Battles about Dallas, New Hope Church, and Allatoona Hills May 26 – June 5.
Operations about Marietta and against Kennesaw Mountain June 10 – July 2.
Ruff's Station, Smyrna Camp Ground, July 4.
Operations at Chattahoochie River Bridge August 26 – September 2.
Expedition to Tuckum's Cross Roads October 26–29.