| Marine Corps|
|Private First Class|
Known Private First Classs
Private First Class, or PFC, is the second enlisted rank in the UNSC Marine Corps and third in the UNSC Army. A Marine PFC is equal in rank to Crewman Apprentice in the UNSC Navy and an Airman in the Air Force. An Army PFC is equal to Crewman in the Navy and Airman First Class in the Air Force. In the Marine Corps, it is one rank above Private, and one rank under Lance Corporal. In the Army, it is one rank above Private (E-2) and one rank below Specialist.
|UNSC Defense Force enlisted ranks|
|E-1||E-2||E-3||E-4||E-5||E-6||E-7||E-8||E-9||Senior Enlisted Advisor|