Marine Corps Army Private First Class Affiliation UNSC Marine Corps and UNSC Army Higher Rank Lance Corporal (Marines) Specialist (Army) Lower Rank Private (Marine Corps) Private (E-2) (Army) Known Private First Classs Chips Dubbo M. Fitzgerald Hosky Wallace A. Jenkins Suzuki Michael Crespo
	[Source]

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
Air Force:	AB	Amn	A1C	SrA	SSgt	TSgt	MSgt	SMSgt	CMSgt - CCM	CMSAF
Army:	PV1	PV2	PFC	SPC - CPL	SGT	SSG	SFC	MSG - 1SG	SGM - CSM	SMA
Marine Corps:	Pvt	PFC	LCpl	Cpl	Sgt	SSgt	GySgt	MSgt - 1stSgt	MGySgt - SgtMaj	SgtMajMC
Navy:	CR	CA	CN	PO3	PO2	PO1	CPO	SCPO	MCPO - CMDCM - FORCM - FLTCM	MCPON