U.S. Army - Military District of Washington

Defences North of the Potomac

Lt. Colonel J. A. Haskins

First Brigade

Colonel A. A. Gibson

3rd Maine Independent Battery

2nd Pennsylvania Heavy Artillery

Colonel Augustus A. Gibson

1st Vermont Heavy Artillery

Colonel James M. Warner

143rd Pennsylvania Infantry Regiment

Colonel Edmund L. Dana

from Pennsylvania

Second Brigade

Colonel Lewis O. Morris

16th Indiana Battery

1st Maine Heavy Artillery

Colonel Daniel Chaplin

7th New York Heavy Artillery

Colonel Lewis O. Morris

9th New York Heavy Artillery

Colonel Joseph Welling

117th New York Infantry, 2nd Battalion

Third Brigade

Colonel W.R. Pease

5th Battalion New York Heavy Artillery

6th Battalion New York Heavy Artillery

7th Battalion New York Heavy Artillery

117th New York Infantry, 1st Battalion