High Quality Content by WIKIPEDIA articles! A platoon is a military unit typically composed of two to four sections or squads and containing 16 to 50 soldiers. Platoons are organized into a company, which typically consists of three, four or five platoons. A platoon is typically the smallest military unit led by a commissioned officer—the platoon leader or platoon commander, usually a lieutenant. He is usually assisted by a senior non-commissioned officer—the platoon sergeant.