Organized at Harrisburg September to November, 1862. Left State for Washington, D. C., November 25, 1862. Attached to Cavalry Brigade, 11th Corps, Army Potomac, to February, 1863. 2nd Brigade, 1st Division, Cavalry Corps, Army Potomac, to August, 1864, and Army Shenandoah to March, 1865. 2nd Brigade, 1st Division, Cavalry Corps, Army Potomac, to June, 1865.