The Army of the Potomac The United States of America
Gen. George Meade (commanding general)
1st Army Corps
Maj. Gen. John F. Reynolds
2nd Army Corps
Maj. Gen. Winfield S. Hancock
3rd Army Corps
Maj. Gen. Daniel E. Sickles
5th Army Corps
Maj. Gen. George Sykes
6th Army Corps
Maj. Gen. John Sedgwick
11th Army Corps
Maj. Gen. Oliver O. Howard
12th Army Corps
Maj. Gen. Henry W. Slocum
Cavalry
Maj. Gen. Alfred Pleasonton