User blog comment:Griever0311/Ask A Marine/@comment-1260687-20100315235114

Marines are formed into 4-man fireteams, with 3 fireteams to a squad, 3 squads to a platoon (plus a platoon commander, platoon sergeant, platoon guide, and 1-3 Corpsmen, plus any attached support personnel such as machine gunners, snipers, engineers, mortarmen, assaultmen, or truck drivers) and 3 infantry platoons, 1 weapons platoon, and a headquarters platoon composing a company.