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Commanded by Brigadier General Philip St. George Cooke

First Brigade Colonel William H. Emory
5th United States Cavalry Regiment Captain Charles J. Whiting (w&c)
Captain Joseph H. McArthur
6th United States Cavalry Regiment Major Lawrence Williams to 2nd Brig.
6th Pennsylvania Cavalry Regiment Colonel Richard H. Rush to 2nd Brig.
2nd Brigade Colonel George A.H. Blake (w 6/27)
 1st United States Cavalry Regiment Lt. Colonel William N. Grier
 8th Pennsylvania Cavalry Regiment Captain August Kautz