who serves as the primary trainer for enlisted
CORPORAL (CPL). Corporal is the base level of the Noncommissioned Officer (NCO) ranks. Corporals serve as team leader of the smallest Army units. Like Sergeants, they are responsible for individual training, personal appearance and cleanliness of Soldiers.ERGEANT MAJOR OF THE ARMY. There's only one Sergeant Major of the Army. The SMA oversees all Noncommissioned Officers. He serves as the senior enlisted advisor and consultant to the Chief of Staff of the Army (a four-star General).