Private
From Halopedia, the Halo wiki
Template:Rank Infobox Private is the lowest enlisted rank of the UNSC Marine Corps and is equal in rank to Crewman Recruit in the UNSC Navy.
A soldier of the lowest military rank, a Private wears no uniform rank insignia. Most new, non-officer Marines begin their military careers as Privates. A Private's only duty is to obey the orders of their commanding officers to the best of their abilites.