Organized at Harrisburg April 20, 1861. Moved to Philadelphia April 21. Occupation of Perryville, Md., April 22. Right Wing moved by boat to Annapolis, Md., April 23. Regiment moved to Washington, D. C., May 8, and camp near Bladensburg. Moved to Shutter's Hill, near Alexandria, June 24. Picket attack on Shutter's Hill July 1 (Co. "E"). Attached to 1st Brigade, Franklin's Heintzelman's Division, McDowell's Army of Northeast Virginia. Advance on Manassas, Va. July 16-21. Battle of Bull Run July 21. Mustered out July 27, 1861.