(n.) The chief commander of an army; especially, the commander in chief of an army consisting of two or more grand divisions under separate commanders; -- a title used in most foreign countries.

ADC CO OD acolyte adjutant agent aid aide-de-camp aider ally assistant attendant auxiliary best man brigadier brigadier general captain chicken colonel chief of staff coadjutant coadjutor coadjutress coadjutrix cohort colleague colonel commandant commander commander in chief commanding officer commissioned officer company officer comrade deputy exec executive officer field marshal field officer first lieutenant five-star general four-star general general general officer generalissimo girl Friday help helper helpmate helpmeet jemadar junior officer lieutenant lieutenant colonel lieutenant general major major general man Friday marechal marshal officer one-star general orderly officer paranymph paraprofessional partner right hand right-hand man risaldar second senior officer servant shavetail sideman sirdar staff officer subahdar subaltern sublieutenant supporting actor supporting instrumentalist the Old Man the brass three-star general top brass two-star general