what is the role of a corporal in the army
Corporal In some militaries, the rank of corporal nominally corresponds to commanding a section or squad of soldiers. However, in the United States Army, the rank of corporal is considered a "lateral promotion" from E-4 Specialist and usually only occurs when the soldier has been selected by a promotion board to become an E-5 Sergeant and is serving in an E-5 billet such as a fireteam leader in a rifle squad. The lateral promotion is used to make the soldier a non-commissioned officer without changing the soldier's pay. As the Table of Organization & Equipment (TO&E) rank of a fire team leader is sergeant and that of squad leader is staff sergeant. In the United States Marine Corps, corporal is the Table of Organization (TO) rank for a rifle fire team leader, machine gun team leader, light mortar squad leader, and assault weapon squad leader, as well as gunner on most larger crew served weapons (i.e. medium mortars, heavy machine guns, and anti-tank missiles), armored vehicles (e.g. tanks, light armored vehicles, and armored assault vehicles), and the two assistant gunners on a howitzer (the gunner is a sergeant).
Non-commissioned officer In the Army, Air Force, and Marine Corps, all ranks of sergeant are termed NCOs, as are corporals in the Army and Marine Corps. A Marine Corps lance corporal (E-3) is not an NCO, but rather junior enlisted. The rank of corporal (E-4) in the Army is a junior NCO, and is to be shown the same respect as any other NCO. In the United States Air Force, E-5 (staff sergeant) and E-6 (technical sergeant) are classified under the NCO tier, while E-7 (master sergeant), E-8 (senior master sergeant), and E-9 (chief master sergeant) are considered senior non-commissioned officers (SNCOs).[10] In the Navy and Coast Guard, all ranks of petty officer are so designated. Junior NCOs (E-4 through E-6 grade), or simply "NCOs" (E-4 and E-5 only) in Marine Corps usage, and function as first-tier supervisors and technical leaders.