The highest, official Command Officer Rank, a Hauptmann is normally placed in charge of one of the various Companies of the Legion or an Air Wing. In a Specialized Regiment, the group a Hauptmann is placed in command of varies between Regiments. A Hauptmann can also be a Chief of Staff for any Field Officer.
There are normally from 958 to 1471 Hauptmanns per Legion due to the varied sizes of Specialized Regiments.