That background may have informed Hackman's portrayal of a military character in ''Bat*21'', a suspenseful film set during the Vietnam War based on the real escape of USAF Lt. Col. Iceal "Ham" Hambleton after being shot down.
He was a force of nature embodying his role in Mississippi Burning. Very physical and I never realized how tall he was until you see him face down some redneck racists! He plays the in-the-trenches tough guy who makes Willem Dafoe look like a comparative dweeb.
Never realized until today, reading his bio that he is a former marine.
Semper Fi. Rest in peace Marine!