U.S. Army - Army of the Potomac

First Army Corps

Major General Irvin McDowell

Transferred to the Department of the Rappahannock April 4, 1862

First Division

Brigadier General W. B. Franklin

1st Brigade

Brigadier General P. Kearney

to Dept. Rappahannock
1st Division

2nd Brigade

Brigadier General H. W, Slocum

3rd Brigade

Brigadier General J. Newton

Second Division

Brigadier General G. A. McCall

1st Brigade

Brigadier General J. Reynolds

to Dept. Rappahannock
2nd Division

2nd Brigade

Brigadier General G. Meade

3rd Brigade

Brigadier General E. O. C. Ord

Third Division

Brigadier General R. King

1st Brigade

Brigadier General C. C. Augur

to Dept. Rappahannock
3rd Division

2nd Brigade

Brigadier General M. Patrick

3rd Brigade

Colonel L. Cutler