Apocalypse Now is a 1979 American epic war film about the Vietnam War, directed, produced and co-written by Francis Ford Coppola. It stars Marlon Brando, Robert Duvall, Martin Sheen, Frederic Forrest, Albert Hall, Sam Bottoms, Laurence Fishburne and Dennis Hopper. The screenplay, co-written by Coppola and John Milius and narration written by Michael Herr, was loosely based on the 1899 novella Heart of Darkness by Joseph Conrad. The setting was changed from late 19th-century Congo to the Vietnam War (1969–70). The film follows a river journey from South Vietnam into Cambodia undertaken by Captain Benjamin L. Willard (a character based on Conrad's Marlow and played by Sheen), who is on a secret mission to assassinate Colonel Kurtz (Brando, with the character being based on Conrad's Mr. Kurtz), a renegade Army officer accused of murder and who is presumed insane.