Ohio Organization at Perryville

I Corps - Major General Alexander M. McCook
   3rd Division - Brigadier General Lovell H. Rousseau
      9th Brigade - Colonel Leonard A. Harris
         2nd Ohio - Lieutenant Colonel John Kell
         33rd Ohio - Lieutenant Colonel Oscar F. Moore
         94th Ohio - Colonel Joseph W. Frizell
      17th Brigade - Colonel William H. Lytle
         3rd Ohio - Colonel John Beatty
         10th Ohio - Lieutenant Colonel Joseph W. Burke
   10th Division - James S. Jackson
      33rd Brigade - William R. Terrill
         105th Ohio - Colonel Albert S. Hall
         Battery D, 1st Ohio Light Artillery (1 section) - Second Lieutenant Nathaniel M. Newell
      34th Brigade - Colonel George P. Webster
         50th Ohio - Lieutenant Colonel Silas A. Strickland
         98th Ohio - Lieutenant Colonel Christian Poorman
         121st Ohio - Colonel William P. Reed

Other Corps Units Engaged (from III Corps)
         9th Ohio - Lieutenant Colonel Charles Joseph
         35th Ohio - Colonel Ferdinand Van Derveer
         52nd Ohio - Lieutenant Colonel D. T. Cowen
         18th United States - Major Frederick Townsend