< to April • May 1861 • to June >

Commanded by Brigadier General Philip St. George Cooke

First Brigade Colonel William H. Emory
5th United States Cavalry Regiment
6th United States Cavalry Regiment Major Lawrence Williams
6th Pennsylvania Cavalry Regiment Colonel Richard H. Rush
2nd Brigade Colonel George A.H. Blake
 1st United States Cavalry Regiment Lt. Colonel William N. Grier
 8th Pennsylvania Cavalry Regiment
4th Pennsylvania Cavalry Regiment Colonel David Campbell (to 5/12)
Colonel James H. Childs
to McCall’s Div., Dept. Rappahannock