Sergeant (UNSC)
From Halopedia, the Halo wiki
The UNSC Marine Corps has several ranks which carry the title of Sergeant, the lowest of which is Sergeant. Marine Sergeants are the fifth enlisted rank in the Marine Corps, just above Corporal and below Staff Sergeant.
A Sergeant is a non-commissioned officer(NCO) ranking above Privates and Corporals, and Commissioned Officers.
