Apocalypse Now (1979)

At the height of the Vietnam war, Captain Benjamin Willard is sent on a dangerous mission that, officially, "does not exist, nor will it ever exist." His goal is to locate - and eliminate - a mysterious Green Beret Colonel named Walter Kurtz, who has been leading his personal army on illegal guerrilla missions into enemy territory.

Plot Keywords: cia, drug abuse, journalist, based on novel or book, guerrilla, vietnam, vietcong, cambodia, secret mission, army, insanity, surrealism, tribe, mission, green beret, jungle, descent into madness, brutality, riverboat