U.S. Army -22nd Army Corps - Department of Washington

Defences South of the Potomac

Brigadier General G. A. DeRussy

First Brigade

Colonel T. R. Tannatt

1st Massachusetts Heavy Artillery

2nd New York Heavy Artillery

Second Brigade

Colonel H.L. Abbot

1st Connecticut Heavy Artillery

19th Connecticut Infantry Regiment

Third Brigade

Colonel J.C. Tidball

4th New York Heavy Artillery

Colonel J.C. Tidball

Fourth Brigade

Major L. Schamberger (to 2/12)

Colonel L. Schirmer

2nd Massachusetts Cavalry (4 cos.)

15th New York Heavy Artillery

Major L. Schamberger (to 2/12)

Colonel L. Schirmer

1st Wisconsin Heavy Artillery, Bat. A