U.S. Army

Department of Pennsylvania (discontinued 7/25)

Major General Robert Patterson

Consolidated with the Department of Northeastern Virginia on July 25, 1861 to form the Department of the Potomac.
General Order #46 honorably discharged General Patterson and General Cadwallader at the end of their terms of service on July 27th.

1st Division

Bde. General George Cadwallader

First Brigade

Col. George H. Thomas

dissolved 7/25, regiments mustered out

Third Brigade

Brig. Gen. A. S. Williams

dissolved 7/22, regiments mustered out

Fourth Brigade

Col. J. C. Longenecker
Col. D. S. Miles (after 7/2)

dissolved 7/21, regiments mustered out

2nd Division

Major General William H. Keim

Second Brigade

Fifth Brigade

Sixth Brigade

3rd Division

Major General C. P. Sandford

Seventh Brigade

Col. C. P. Stone

to Dept. Shenandoah, 3rd Bde.

Eighth Brigade

Col. Schwartzwalder
Col. D. Butterfield

dissolved 7/25, regiments mustered out

Unattached

11th Indiana Infantry Regiment

Colonel Lew Wallace

from Cumberland, Md. 7/8
to Indianapolis for muster out 7/29

1st United States Artillery, Battery E

1st United States Artillery, Battery H