Private is the lowest enlisted rank of the UNSC Marine Corps, and the second lowest in the UNSC Army. The Marine Corps Private (Pvt) and the lower Army Private (PV1) are grade E-1 and are equal in rank to Crewman Recruit in the UNSC Navy and Airman Basic in the Air Force. The Army's higher Private (PV2) are known as E-2, and is equal to PFC in the Marines, Crewman Apprentice in the Navy, and Airman in the Air Force. For most recruits into the Marine Corps and Army, upon completing basic training, they become a Private, and are further assigned to a specific unit. Private First Class is the next higher rank.

Community content is available under CC-BY-SA unless otherwise noted.