R. Lee Ermey

Ermey was born in Emporia, Kansas, on March 24, 1944, to John Edward (1924–2016) and Betty (née Pantle) Ermey (1926–2004). A few years after his birth, his father moved the family (including Ermey and his five brothers) to a small farm outside Kansas City, Kansas. Then, in 1958, when Ermey was 14, his father moved the family to a rural home between Zillah, Washington, and Granger, Washington.

As a teenager, Ermey was an admitted "troublemaker and a bit of a hell-raiser", and frequently got into trouble. In 1961, when Ermey was 17, his mother took him to a judge in an attempt to correct his behavior. The judge gave the young Ermey a choice between military service or jail; Ermey chose military service. Ermey enlisted in the United States Marine Corps in 1961 at age 17 and went through recruit training at Marine Corps Recruit Depot San Diego in San Diego, California. He served in the aviation support field for a few years before becoming a drill instructor in India Company, 3rd Recruit Training Battalion, at Marine Corps Recruit Depot San Diego, where he was assigned from 1965 to 1967.

Ermey then served in Marine Wing Support Group 17 at Marine Corps Air Station Futenma on Okinawa, Japan. In 1968, he was ordered to South Vietnam with MWSG-17, and spent 14 months in-country. The remainder of his service was on Okinawa, where he was advanced to Staff Sergeant (E-6). He was medically retired in 1972 because of several injuries. On May 17, 2002, he received an honorary promotion to Gunnery Sergeant (E-7) by Commandant of the Marine Corps General James L. Jones.

Ermey regularly took the opportunity to speak with new recruits, visiting the Marine Corps Recruit Depot San Diego in San Diego, California, and the Marine Corps Recruit Depot Parris Island (located within Port Royal, South Carolina, approximately five miles (8.0 km) south of Beaufort). An episode of Mail Call was filmed at the latter of these two training bases.