Lee Ermey when he was an actual Drill Instructor Circa 1966.

Ronald Lee Ermey (March 24, 1944 – April 15, 2018)

(Fox News) – R. Lee Ermey, a former Marine Corps drill instructor known
to millions of moviegoers as the sadistic Gunnery Sergeant Hartman in
Stanley Kubrick’s "Full Metal Jacket” (1987) died Sunday morning.

In a statement posted on Twitter,his longtime manager Bill Rogin said
Ermey had died due to complications from pneumonia.