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

First Division

Brigadier General Abner Doubleday

First Brigade

Colonel Walter Phelps, Jr.

22nd New York Infantry Regiment

Lt. Colonel John McKie Jr.

24th New York Infantry Regiment

Lt. Colonel Samuel R. Beardsley

30th New York Infantry Regiment

84th New York Infantry Regiment

24th Michigan Infantry Regiment

Colonel Henry Morrow

Second Brigade

Lt. Colonel J. W. Hoffman

7th Indiana Infantry Regiment

76th New York Infantry Regiment

95th New York Infantry Regiment

56th Pennsylvania Infantry Regiment

Third Brigade

Brigadier General Marsena R. Patrick (until 10/6)

Colonel W. F. Rogers (10/6 - 10/14)

Brigadier General Gabriel B. Paul (after 10/14)

21st New York Infantry Regiment

Colonel William F. Rogers

23rd New York Infantry Regiment

Colonel Henry C. Hoffman

35th New York Infantry Regiment

Colonel Newton B. Lord

20th New York State Militia (80th N.Y)

Fourth Brigade

Brigadier General John Gibbon

19th Indiana Infantry Regiment

2nd Wisconsin Infantry Regiment

Colonel Lucius Fairchild

6th Wisconsin Infantry Regiment

7th Wisconsin Infantry Regiment

Artillery

1st New Hampshire Battery

Battery D, 1st Rhode Island Artillery

to 9th Corps, 2nd Div.

Battery L, 1st New York Artillery

Battery B, 1st United States Artillery