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

First Division

Brigadier General J.C. Rice (until 9/23)

Brigadier General L. Cutler (after 9/23)

First Brigade

Colonel W. W. Robinson

19th Indiana Infantry Regiment

24th Michigan Infantry Regiment

1st New York Sharpshooter Battalion

2nd Wisconsin Infantry Regiment

6th Wisconsin Infantry Regiment

7th Wisconsin Infantry Regiment

Major Mark Finnicum

Second Brigade

Colonel G. H. Biddle (until 9/23)

Brigadier General J.C. Rice (9/23 - 9/24)

Colonel Edward B. Fowler (after 9/24)

7th Indiana Infantry Regiment

Colonel Ira G. Grover

14th New York State Militia (84th N.Y.)

Colonel Edward Fowler

76th New York Infantry Regiment

95th New York Infantry Regiment

Major Edward Pye

147th New York Infantry Regiment

Major George Harney

56th Pennsylvania Infantry Regiment

Colonel J. William Hofmann