U.S. Army

Department of the Rappahannock

Major General Irvin McDowell

First Division

Brigadier General W. B. Franklin

1st Brigade

Brigadier General P. Kearney

2nd Brigade

Brigadier General H. W. Slocum

3rd Brigade

Brigadier General J. Newton

Second Division

Brigadier General George McCall

1st Brigade

Brigadier General John F. Reynolds

2nd Brigade

Brigadier General George Meade

3rd Brigade

Brigadier General Edward O. C. Ord

Third Division

Brigadier General Rufus King

1st Brigade

Brigadier General C. C. Augur

2nd Brigade

Brigadier General Marsena Patrick

3rd Brigade

Colonel Lysander Cutler (until 5/7)

Brigadier General John Gibbon (after 5/7)

Ord's Division

Brigadier General Edward O. C. Ord

from Defences of Washington 5/16

1st Brigade

Brigadier General J. B. Ricketts

2nd Brigade

Brigadier General Abram Duryea

3rd Brigade

Brigadier General G. L. Hartsuff

Shield's Division

Brigadier General James Shields

from Department of the Shenandoah

1st Brigade

Brigadier General Nathan Kimball

2nd Brigade

Brigadier General O. S. Ferry

3rd Brigade

Brigadier General E. B. Tyler

4th Brigade

Brigadier General E. S. S. Carroll

Bayard's Cavalry Brigade

Brigadier General George Bayard

1st Maine Cavalry Regiment (7 cos.)

1st Pennsylvania Cavalry Regiment

1st Pennsylvania Rifle Battalion

1st New Jersey Cavalry Regiment

Colonel Percy Wyndham

Doubleday's Brigade

Brigadier General Abner Doubleday

76th New York Infantry Regiment

95th New York Infantry Regiment

56th Pennsylvania Infantry Regiment

2nd New York Artillery Bn., Co. B

Geary's Brigade

Brigadier General John Geary

28th Pennsylvania Infantry Regiment

3rd Indiana Cavalry Regiment

1st West Virginia Cavalry Regiment

Pennsylvania Independent Battery E