The term captain can mean a variety of different things in World of Warcraft and other Warcraft-related areas: * A military title that has different meanings in different types of military service. * Air force: The leader of any large aircraft (zeppelin) with similar sub-officers to naval vessels. * Army: The leader of a company of soldiers (indeterminate number) with sub-officers typically lieutenants and sergeants. * Navy: Usually the leader of any seagoing vessel (boat or ship) with sub-officers being first mate and other mates. * Part of a rank name, Knight Captain, in the old PvP Honor System. * In Warcraft: Orcs & Humans, it is a rank you can achieve.