Federal Brigade

2nd Brigade, 3rd Division, 5th Corps

Commanding Officer on the Antietam Campaign:
  Col. Peter H. Allabach

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:
  123rd Pennsylvania Infantry
  131st Pennsylvania Infantry
  133rd Pennsylvania Infantry
  155th Pennsylvania Infantry