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

Second Division

Colonel John I. Gregg (until 4/4)

Bde. Gen. David McM. Gregg (after 4/4)

First Brigade

Lt. Colonel David Gardner (until 4/17)

Bde. Gen. Henry E. Davies (after 4/17)

1st Massachusetts Cavalry Regiment

1st Maryland Cavalry Regiment

Colonel Andrew W. Evans

1st New Jersey Cavalry Regiment

1st Pennsylvania Cavalry Regiment

Colonel John P. Taylor

1st Rhode Island Cavalry Regiment

to Defences of Washington, 22nd Corps

Second Brigade

Colonel John I. Gregg

1st Maine Cavalry Regiment

10th New York Cavalry Regiment

2nd Pennsylvania Cavalry Regiment

Colonel Richard B. Price

4th Pennsylvania Cavalry Regiment

16th Pennsylvania Cavalry Regiment

Colonel John I. Gregg*