U.S. Army - Army of the Potomac

Cavalry Corps

Major General George Stoneman (until 5/22)

Brigadier General Alfred Pleasonton (after 5/22)

First Division

Brigadier General Alfred Pleasonton (until 5/22)

Brigadier General John Buford (5/22 - 5/27)

Colonel Benjamin F. Davis (after 5/27)

First Brigade

Colonel Benjamin F. Davis (until 5/27)

Colonel William Gamble (after 5/27)

Second Brigade

Colonel Thomas C. Devin

Second Division

Brigadier General W. W. Averill (until 5/16)

Colonel A. N. Duffie (after 5/16)

First Brigade

Colonel H. B. Sergeant (until 5/20)

Colonel L. P. DiCesnola (after 5/20)

Second Brigade

Colonel J. B. McIntosh (until 5/13)

Colonel John I. Gregg (after 5/13)

Third Division

Brigadier General David McM. Gregg

First Brigade

Colonel Judson Kilpatrick (until 5/13)

Colonel C. Doughty (after 5/13)

Second Brigade

Colonel Percy Wyndham

Reserve Brigade

Brigadier General John Buford (until 5/22)

Major Charles Whiting (after 5/22)

6th Pennsylvania Cavalry Regiment

Major Robert Morris, Jr.

1st United States Cavalry Regiment

Captain R. S. C. Lord

2nd United States Cavalry Regiment

Major Charles J. Whiting

5th United States Cavalry Regiment

Captain James E. Harrison

6th United States Cavalry Regiment

Captain George C. Cram

Artillery Reserve Brigade

2nd United States Artillery, Batteies B&L

Lieutenant Albert O. Vincent

2nd United States Artillery, Battery M

Lieutenant Robert Clarke

to Army 1st Bde. Horse Artillery

4th United States Artillery, Battery E

Lieutenant Samuel S. Elder