U.S. Army

22nd Army Corps, Department of Washington

Major General C. C. Augur

Defences North of the Potomac

Lt. Colonel J. A. Haskins

First Brigade

Col. J. M. Warner (to 5/12)

Colonel W. H. Hayward

Second Brigade

Colonel L. O. Morris (to 5/16)

Colonel H. Miller

Third Brigade

Colonel J. Welling (to 5/27)

Lt. Colonel J.H. Oberteuffer

Defences South of the Potomac

Bde. Gen. G. A. DeRussy

First Brigade

Col. A. A. Gibson (to 5/16)

Colonel J.C. Lee

Second Brigade

Colonel T. R. Tannatt (to 5/16)

Colonel W.S. Irwin

Third Brigade

Col. Alex Piper (to 5/14)

Fourth Brigade

King's Division

Bde. Gen. R. O. Tyler

First Brigade

Colonel A. H. Grimshaw

Second Brigade

Colonel M. Murphy

brigade discontinued

Independent Cavalry Brigade

Colonel C. R. Lowell, Jr.

2nd Massachusetts Cavalry Regiment

13th New York Cavalry Regiment

16th New York Cavalry Regiment

District of Alexandria

Brig. Gen. John P. Slough

4th Delaware Infantry Regiment

1st District of Columbia Infantry Regt.

5th New York Veteran Infantry Regiment

to 5th Corps, 1st Div., 1st Bde.

Pennsylvania Independent Battery H

District of Washington

Bde. Gen. J. H. Martindale (to 5/2)

Colonel M. N. Wisewell

First Brigade

Colonel H. R. Rush (to 5/21)

Colonel M. N. Wisewell

Second Brigade

Colonel W. H. Brownd

organized 5/28

150th Pennsylvania Infantry, Co. K

Light Artillery Camp Camp Berry

Bde. Gen. A. P. Howe

1st Maine Light Artillery

to Defences S. Potomac, 1st Bde.

3rd Maine Light Artillery

Maryland Battery A

to Defences S. Potomac, 1st Bde.

16th Massachusetts Battery

13th Michigan Independent Battery

to Defences N. Potomac, 1st Bde.

14th Michigan Independent Battery

to Defences N. Potomac, 1st Bde.

3rd New Jersey Battery

to Abercrombie's Command, Belle Plaine

1st New York Artillery, Battery F

to Defences S. Potomac, 2nd Bde.

1st New York Artillery, Battery K

to Defences S. Potomac, 1st Bde.

10th New York Independent Battery

17th New York Independent Battery

1st Ohio Artillery, Battery L

to Defences N. Potomac, 1st Bde.

1st Pennsylvania Artillery, Battery G

to Defences S. Potomac, 1st Bde.

1st Pennsylvania Artillery, Battery H

to Defences S. Potomac, 1st Bde.

1st Pennsylvania Artillery, Battery I

to Defences S. Potomac, 2nd Bde.

Pennsylvania Independent Battery C

Pennsylvania Independent Battery F

to Defences S. Potomac, 2nd Bde.

1st West Virginia Artillery, Battery C

to Defences S. Potomac, 2nd Bde.

5th United States Artillery, Battery F

5th United States Artillery, Battery I

5th United States Artillery, Battery L