Private first class
United States
In the United States Marine Corps, the rate of private first class is the second lowest, just under lance corporal and just above Private, equivalent to NATO grade OR-2, being pay grade E-2. It was established on June 3, 1916 to match the already existing Army rank, primarily because US Marine units were "often called upon to serve" with US Army organizations, such as in the American Expeditionary Force that served in Europe during World War I (e.g. 4th Marine Brigade of the U.S. Army's 2nd Infantry Division). At the time the two ranks were directly equivalent. However, the USMC rank of PFC is one grade lower (E-2) than the similarly titled US Army rank.
Private first class-8