U.S. Army

Department of Pennsylvania

Major General Robert Patterson

1st Division

Brigadier General George Cadwallader

First Brigade

Col. George H. Thomas

Third Brigade

Brig. Gen. A. S. Williams

Fourth Brigade

Col. J. C. Longenecker

2nd Division

Major General William H. Keim

Second Brigade

Bde. Gen. G. C. Wynkoop

Fifth Brigade

Bde. Gen. J. S. Negley

Sixth Brigade

Col. J. J. Abercrombie

Unattached

1st United States Artillery, Battery E

from Fort Hamilton, New York 6/3

1st United States Artillery, Battery H

from Fort Hamilton, New York 6/3