Apocalypse Now (1979)

At the height of the Vietnam War, U.S. Army Captain Benjamin Willard is sent on a covert mission to eliminate Colonel Kurtz, a once-decorated officer who has gone rogue. Now leading his own army deep in the Cambodian jungle, Kurtz sees himself as a god, waging unauthorized guerrilla warfare. Willard's journey upriver with a small crew aboard a Navy patrol boat reveals the chaos of war and the growing parallel between him and his target.