Union Order of Battle at Gettysburg
Army of the Potomac, Cavalry Corps, 3rd Division

3rd Div., 1st Brigade Cavalry Corps Acting Brigadier General Elon John Farnsworth Born in Michigan, Age 25 Wikitree Information	3rd Div., 2nd Brigade Cavalry Corps Brigadier General George Armstrong Custer Born in Ohio, Age 23 Wikitree Information
Regiments: 5th New York | 420 men |Roster 18th Pennsylvania | 509 men |Roster 1st Vermont | 600 men |Roster 1st West Virginia | 395 men |	Regiments: 1st Michigan | 427 men | Roster 5th Michigan | 646 men | Roster 6th Michigan | 477 men | Roster 7th Michigan | 383 men | Roster