Atlantis uses a mostly Roman/Byzantine Military structure and names. Much like a majority of the world uses the Gregorian Calander, even if they are not Christian nations. Latin is the Lingua franca of most of the world in Rule of the gods.
Atlantean Military Rank Conversion
Imperia General
Legatus Lieutenant
Praetoria Commander
Tribune 2nd Lieutenant
Preafectus Colonel
Primus Pilus Major
Pilus Prior Senior Captain
Centurion Captain
Quaestor Quartermaster
Actarius Paymaster
Optio Sergeant
Principali Corporal
Miles Gregarius Soldiers
Tirones Traines
Capsaroir Orderly
Medicus Physician
Atlantean Military Structure
Unit Men
Legio 5,760
Chortum 480
Maniple 120
Centuria 80
Contubernium 8