El Dorado (1966)

Rated: PG
Genres: Drama, Romance, Western
Stars: John Wayne, Robert Mitchum, James Caan

Cole Thornton, a gunfighter for hire, joins forces with old friend, Sheriff J.P. Hara. Together with an old Indian fighter and a gambler, they help a rancher and his family fight a rival rancher who's trying to steal their water.

Hired gunman Cole Thornton (John Wayne) turns down a job with Bart Jason (Edward Asner) as it would mean having to fight an old sheriff friend (Robert Mitchum). Some months later, he finds out the lawman is on the bottle and a top gunfighter (Christopher George) is heading his way to help Jason. Along with young Mississippi (James Caan), handy with a knife and now armed with a diabolical shotgun, Cole returns to help.

Director: Howard Hawks
Writers: Leigh Brackett, Harry Brown
Production companies: Paramount Pictures, Laurel Productions
More info on IMDb: https://www.imdb.com/title/tt0061619/