U.S. Army - Army of the Potomac - Ninth Army Corps

Second Division

Major General Jesse L. Reno (until 9/2)

Brigadier General Samuel D. Sturgis (after 9/2)

First Brigade

Brigadier General James Nagle

2nd Maryland infantry Regiment

6th New Hampshire Infantry Regiment

9th New Hampshire Infantry Regiment

from New Hampshire

48th Pennsylvania Infantry Regiment

Second Brigade

Brigadier General Edward Ferrero

21st Massachusette Infantry Regiment

35th Massachusette Infantry Regiment

from Massachusetts

11th New Hampshire Infantry Regiment

from New Hampshire

51st New York Infantry Regiment

51st Pennsylvania Infantry Regiment

Artillery

Pennsylvania Independent Battery D

from Army of Virginia, 3rd Corps, 1st Division

4th United States Artillery, Battery E

from Army of Virginia, 3rd Corps