U.S. Army - Deptartment of Northeasten Virginia

Third Division

Brigadier General Samuel P. Heintzelman (w 7/21)

First Brigade

Brigadier General W. B. Franklin

from Dist. Washington 7/16

to Boston to muster out 7/29

from Dist. Washington 7/3

4th Pennsylvania Infantry Regiment

Colonel John Hartranft

refused to extend service on eve of battle and mustered out 7/20

5th Pennsylvania Infantry Regiment

Colonel R. P. McDowell

remained at Alexandria during battle and mustered out at Harrisburg 7/25

1st United States Artillery, Battery I

Captain J. B. Ricketts (w, c 7/21)

Lieutenant E. Kirby

Second Brigade

Colonel Orlando B. Wilcox (w&c 7/21)

Colonel J. H. Hobart Ward (after 7/21)

11th New York Infantry Regiment

Colonel Noah L. Farnham (mw 7/21)

Lt. Colonel John A. Cregier (after 7/21)

from Dist. Washington 7/16

38th New York Infantry Regiment

Colonel J. Hobart Ward (to 7/21)

Lt. Colonel Addison Farnsworth (after 7/21)

1st Michigan Infantry Regiment

Major Alonzo F. Bidwell

4th Michigan Infantry Regiment

Colonel Dwight A. Woodbury

2nd United States Artillery, Battery D

Captain Richard Arnold

Third Brigade

Colonel Oliver O. Howard

3rd Maine Infantry Regiment

Major Henry G. Staples

4th Maine Infantry Regiment

Colonel Hiram G. Berry

5th Maine Infantry Regiment

Colonel Mark H. Dunnell

2nd Vermont Infantry Regiment

Colonel Henry Whiting