As decreed by the Emperor, the highest posts in the military are the Joint Chiefs, comprising 2 generals chosen by the Army, 2 admirals chosen by the Navy, the Judge Advocate General, and the chairman – the Magister Militum, along with the Emperor, The Regens, the Empress and the Regensia. Those people run a force which numbers millions, all licenced to kill, in a society where the military are also the police.
There are two major branches to the military - the army and the navy. These two have different rank structures, and means of undertaking their business.