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

Third Division

Brigadier General Silas Casey

First Brigade

Brigadier General H. M. Naglee

11th Maine Infantry Regiment

Colonel John C. Caldwell

56th New York Infantry Regiment

Colonel Charles H. Van Wyck

100th New York Infantry Regiment

Colonel James M. Brown

52nd Pennsylvania Infantry Regiment

Colonel John C. Dodge Jr.

104th Pennsylvania Infantry Regiment

Colonel William V. H. Davis (w 5/31)

Captain Edward Rogers (after 5/31)

Second Brigade

Brigadier General William H. Keim

96th New York Infantry Regiment

Colonel James Fairman

Lt. Colonel Charles O. Gray

85th Pennsylvania Infantry Regiment

Colonel Joshua B. Howell

101st Pennsylvania Infantry Regiment

Colonel Joseph H. Wilson (died 5/30)

Lt. Colonel David B. Morris (after 5/30)

103rd Pennsylvania Infantry Regiment

Colonel Theodore F. Lehmann

Major Audley W. Gazzon

Third Brigade

Brigadier General I. N. Palmer

81st New York Infantry Regiment

Colonel Edwin Rose

Lt. Colonel Jacob J. DeForest

85th New York Infantry Regiment

Colonel Uriah L. Davis.

92nd New York Infantry Regiment

Colonel Jonah Sanford

Lt. Colonel Hiram Anderson, Jr.

93rd New York Infantry Regiment

Colonel John S. Crocker

Lt. Colonel Benjamin C. Butler

to Army Potomac Provost Guard

98th New York Infantry Regiment

Colonel William Dutton

Artillery

Colonel Guilford D. Bailey

1st New York Artillery, Battery A

Captain Thomas H. Bates

captured 5/31

1st New York Artillery, Battery H

Captain Joseph Spratt

7th New York Independent Battery

Captain Peter C. Regan

8th New York Independent Battery

Captain Butler Fitch