Perryville Union order of battle
The following Union Army units and commanders fought in the Battle of Perryville of the American Civil War. Order of battle compiled from the army organization during the battle and return of casualties. The Confederate order of battle is listed separately. Army of the Ohio. MG Don Carlos Buell, Commanding MG George Henry Thomas, second in command Escort: Signal detachment: Cpt Jesse Merrill I Corps. MG Alexander McDowell McCook II Corps. MG Thomas Leonidas Crittenden Escort: III Corps. MG Charles Champion Gilbert