• Organized at West Chester June 9, 1861.
• Moved to Harrisburg, Pa., July 20;
• thence reported to General Dix at Baltimore, Md., July 22, 1861.
• Mustered into United States service at Camp Carroll, near Baltimore, July 26.
• Moved to Annapolis, Md., July 27.
• Attached to Dix’s Command to September, 1861.
• 1st Brigade, McCall’s Pennsylvania Reserves Division, Army of the Potomac, to March, 1862.
• 1st Brigade, 2nd Division, 1st Army Corps, Army of the Potomac, to April, 1862.
• 1st Brigade, McCall’s Division, Dept. of the Rappahannock, to June, 1862.
• 1st Brigade, 3rd Division, 5th Army Corps, Army of the Potomac, to August, 1862.
• 1st Brigade, 3rd Division, 3rd Corps, Army of Virginia, to September, 1862.
• 1st Brigade, 3rd Division, 1st Army Corps, Army of the Potomac, to February, 1863.
• 1st Brigade, Pennsylvania Reserves Division, 22nd Army Corps, to June, 1863.
• 1st Brigade, 3rd Division, 5th Army Corps, Army of the Potomac, to June, 1864.

Source:. Dyer, Frederick H. A Compendium of the War of the Rebellion Compiled and Arranged from Official Records of the Federal and Confederate Armies, Reports of he Adjutant Generals of the Several States, the Army Registers, and Other Reliable Documents and Sources, Des Moines, Iowa: The Dyer Publishing Company, 1908