U.S. Army - Army of the Potomac

Cavalry Corps

Brigadier General Alfred Pleasonton

First Division

Brigadier General John Buford

First Brigade

Colonel William Gamble

Second Brigade

Colonel Thomas C. Devin

Reserve Brigade

Brigadier General Wesley Merritt

Second Division

Bde. Gen. David McM. Gregg

First Brigade

Colonel J. B. McIntosh

Second Brigade

Colonel Pennock Huey

Third Brigade

Colonel John I. Gregg

Third Division

Bde. Gen. Jusdson Kilpatrick (until 7/15)

Bde. Gen. George A. Custer (after 7/15)

First Brigade

Bde. Gen. Elon Farnsworth (k 7/3)

Colonel Nathaniel Richmond (7/3 - 7/9)

Colonel O. D. Forest (7/9 - 7/15)

Colonel H. E. Davies (7/15 - 7/25)

Colonel E. B. Sawyer (after 7/25)

Second Brigade

Bde. Gen. George A. Custer (until 7/15)

Colonel Charles H. Town (after 7/15)

1st Brigade Horse Artillery

Captain James M. Robertson

..

1st Michigan Artillery, Battery L

Captain Jabez Daniels

6th New York Indpendent Battery

Captain Joseph W. Martin

2nd United States Artillery, Battery D

from 6th Corps Artillery

2nd United States Artillery, Batteries E&L

1st Lieutenant Edward Heaton

2nd United States Artillery, Battery M

1st Lieutenant Alexander C. M. Pennington

4th United States Artillery, Battery A

from 2nd Corps Artillery

4th United States Artillery, Battery E

1st Lieutenant Samuel S.Elder

2nd Brigade Horse Artillery

Captain John Caldwell Tidball

..

1st United States Artillery, Batteries C&G

Captain Alanson M. Randol

1st United States Artillery, Battery K

Captain William M. Graham Jr.

2nd United States Artillery, Battery A

2nd Lieutenant John H. Calef

3rd United States Artillery, Battery C

1st Lieutenant William D. Fuller