Organized at Camp Curtin, Harrisburg, May 3, 1861. (Co. "C" mustered for three years April 20, 1861, the first Company of Pennsylvania to so volunteer.) Moved to York, Pa., May 9, and duty there till June 3. Moved to Chambersburg June 3, thence to Williamsport June 16. Attached to Miles' 4th Brigade, Cadwalader's 1st Division, Patterson's Army. At Williamsport June 16-July 2. Occupation of Martinsburg July 3. Advance on Bunker Hill July 15. At Charlestown July 17. Mustered out July 30, 1861.