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

First Division

Brigadier General W. S. Hancock

First Brigade

Brigadier General J. C. Caldwell

5th New Hampshire Infantry Regiment

7th New York Infantry Regiment

Colonel George Von Schack

61st New York Infantry Regiment

64th New York Infantry Regiment

81st Pennsylvania Infantry Regiment

Colonel Charles F. Johnson

145th Pennsylvania Infantry Regiment

Colonel Hiram L. Brown

from 2nd Brigade (see below)

Second Brigade "Irish Brigade"

Brigadier General T. F. Meagher

29th Massachusetts Infantry Regiment

63rd New York Infantry Regiment

69th New York Infantry Regiment

88th New York Infantry Regiment

116th Pennsylvania Infantry Regiment

Colonel Dennis Heenan

from Fairfax C. H. 10/6

145th Pennsylvania Infantry Regiment

Colonel Hiram L. Brown

to 1st Brigade (see above)

Third Brigade

Colonel J. R. Brooke (until 10/6)

Colonel S. K. Zook (after 10/6)

2nd Delaware Infantry Regiment

Colonel Henry W. Wharton (res. 10/6)

Colonel William P. Baily (after 10/6)

52nd New York Infantry Regiment

57th New York Infantry Regiment

66th New York Infantry Regiment

53rd Pennsylvania Infantry Regiment

Lt. Colonel Richards McMichael (to 10/6)

Colonel John R. Brooke (after 10/6)

Artillery

Battery B, 1st New York Artillery

Battery G, 1st New York Artillery

4th United States Artillery,
Batteries A & C