73rd Pennsylvania Infantry Regiment

The 73rd Pennsylvania Infantry was organized at Philadelphia, Pennsylvania beginning in June 1861 and mustered in for a three year enlistment on September 19, 1861 under the command of Colonel John A. Koltes.

The regiment was attached to Steinwehr's Brigade, Blenker's Division, Army of the Potomac, to March 1862.

2nd Brigade, Blenker's Division, II Corps, Army of the Potomac, to April 1862.

2nd Brigade, Blenker's Division, Department of the Mountains, to June 1862.

2nd Brigade, 1st Division, I Corps, Army of Virginia, to September 1862.

2nd Brigade, 2nd Division, XX Corps, to July 1865.

Duty in the Shenandoah Valley and at Sperryville until August.

Battle of Cedar Mountain August 9 (reserve).

Pope's campaign in northern Virginia August 16-September 2.

Movement to Centreville November 1–19, then to Fredericksburg December 9–16.

Operations at Welford's, Kelly's, and Beverly Fords April 14–15.

Guard duty along Orange & Alexandria Railroad until September.

Operations on line of Pumpkin Vine Creek and 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 or Smyrna Camp Ground July 4.

Expedition to Tuckum's Cross Roads October 26–29.