Federal Division

1st Division, IV Corps

Commanding Officer on the Antietam Campaign:
  Darius Nash Couch

This Division's Chain of Command:
  Army - Army of the Potomac
  Corps - Sixth (VI) Army Corps

Units which make up this Division:
  1st Brigade, 1st Division, IV Corps
  1st Division, IV Corps Artillery
  2nd Brigade, 1st Division, IV Corps
  3rd Brigade,1st Division, IV Corps