The Good, the Bad and the Ugly (1966)

As the American Civil War tears through the Southwest, bounty hunter Blondie and Mexican bandit Tuco Ramirez become reluctant partners in a hunt for a hidden cache of stolen gold. A dying man reveals the location, but he gives each of them only part of the information, forcing the two men to stay together despite their mutual distrust. Their search is complicated by Sentenza, a ruthless hitman who is pursuing the same fortune and will eliminate anyone standing between him and the treasure.