U.S. Army - Army of the Potomac

First Army Corps

Major General John F. Reynolds (except 3/1-3/9)

Brigadier General James S. Wadsworth (3/1 - 3/9)

First Division

Brigadier General S. Meredith (3/1)

Brigadier General Gabriel Paul (3/1 - 3/9)

Brigadier General James S. Wadsworth (after 3/9)

1st Brigade

Colonel Walter Phelps, Jr. (until 3/20)

Colonel W. M. Sealing (after 3/20)

2nd Brigade

Colonel J. Gavin (until 3/26)

Bde. Gen. Lysander Cutler (after 3/26)

3rd Brigade

Colonel H. M. Bossart (until 3/9)

Brigadier General G. B. Paul (3/9 - 3/29)

Colonel A. T. Berthoud (after 3/29)

4th Brigade

Colonel W. W. Robinson (3/1)

Brigadier General S. Meredith (after 3/1)

Second Division

Brigadier General J.C. Robinson

1st Brigade

Colonel A. R. Root

2nd Brigade

Colonel Peter Lyle

3rd Brigade

Colonel C. Wheelock (to 3/17)

Colonel R. Coulter (after 3/17)

Third Division

Brigadier General A. Doubleday

1st Brigade

Colonel J. R. Porter (to 3/28)

Bde. Gen. John R. Rowley (after 3/28)

2nd Brigade

Brigadier General Roy Stone