Commandant

Commandant is the officer, of whatever rank, in command of a fortress or military post of any kind—e.g. a station on the lines of communication of an army. The title is also given to an officer commanding a larger body of troops than is proper to his rank, as captain-commandant, lieutenant-commandant, &c., and to the senior lieutenant-colonel of a volunteer battalion in the British army, where there are two or more on its establishment. There are also commandants to most military schools.