1. (n.) Primarily, a square; hence, a square body of troops; a body of troops drawn up in a square.

2. (n.) A body of cavalry comprising two companies or troops, and averaging from one hundred and twenty to two hundred men.

3. (n.) A detachment of vessels employed on any particular service or station, under the command of the senior officer; as, the North Atlantic Squadron.

KP Naval Construction Battalion RN Royal Navy Seabees USN United States Navy air arm air corps air force air service argosy armada army army group battalion battery battle group brigade cadre coast guard cohort column combat command combat team company corps detachment detail division escadrille field army field train file fleet flight flotilla flying column garrison kitchen police legion maniple marine merchant fleet merchant marine merchant navy mosquito fleet naval forces naval militia naval reserve navy organization outfit phalanx platoon posse rank regiment section squad strategic air force tactical air force tactical unit task force task group train troop unit wing