noun: A military unit that is dispatched from a larger unit usually for special purposes or missions.
DUDE: Remember that CWAR detachment we were on back in 99?
HOMIE: Yeah man, we were way out in Egypt, site 60 or something. There wasn't anyone around except those Mexicans that night.
DUDE: Yeah that was some funny shit. That idiot Welford thought he was Border Patrol.