Federal Brigade

1st Brigade, 3rd Division, 5th Corps

Commanding Officer on the Antietam Campaign:
  Erastus Bernard Tyler

This Brigade's Chain of Command:
  Army - Army of the Potomac
  Corps - Fifth Army Corps
  Division - 3rd Division, 5th Corps

Units which make up this Brigade:
  126th Pennsylvania Infantry
  129th Pennsylvania Infantry
  134th Pennsylvania Infantry
  91st Pennsylvania Infantry