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

from 3rd Bde. (see below)

19th Connecticut Infantry Regiment

3rd New York Heavy Artillery Battalion

Third Brigade

Colonel J.C. Tidball

1st Connecticut Heavy Artillery

to 2nd Bde. (see above)

4th New York Heavy Artillery

Colonel J.C. Tidball

from 4th Bde. (see below)

1st Wisconsin Heavy Artillery, Bat. A

to 4th Bde. (see below)

Fourth Brigade

Colonel L. Schirmer

2nd Massachusetts Cavalry (4 cos.)

Colonel L. Schirmer

4th New York Heavy Artillery

Colonel J.C. Tidball

to 3rd Bde. (see above)

15th New York Heavy Artillery

from 2nd Bde. (see above)

1st Wisconsin Heavy Artillery, Bat. A

from 3rd Bde. (see above)