Their most notable engagement was the Battle of Monocacy, where the unit sustained heavy casualties halting a Confederate advance.

Fourteen months earlier, the regiment spent their first encampment of the war guarding Monocacy Junction.

The 14th New Jersey Infantry Regiment was organized at Camp Vredenburgh (named in honor of Judge Peter Vredenburgh) near Freehold, New Jersey, and mustered in for three years service on August 26, 1862, under the command of Colonel William Snyder Truex.

The regiment was attached to Defenses of Baltimore, Maryland, VIII Corps, Middle Department, to January 1863.

3rd Provisional Brigade, French's Division, VIII Corps, to July 1863.

1st Brigade, 3rd Division, III Corps, Army of the Potomac, to March 1864.

The 14th New Jersey Infantry mustered out of service near Washington, D.C., on June 18, 1865.

Duty near Monocacy, Maryland, guarding railroad bridges and other points on the Upper Potomac, until June 1863.

Moved to Harper's Ferry, West Virginia, and duty there and at Maryland Heights until June 30.

Moved to Frederick, Maryland, June 30, and to Monocacy July 2.

Sheridan's Shenandoah Valley Campaign August 7-November 28.