The Magnificent Seven

A poor village in Mexico is periodically raided for food and supplies by a gang of bandits led by Calvera (Eli Wallach). After the latest raid, during which the bandits kill a villager, the village leaders decide they have had enough, and on the advice of the village elder (Vladimir Sokoloff), they decide to fight back. Taking what few objects of value the village has, three villagers ride to a town just inside the United States border hoping to barter for weapons. They are impressed by Chris Adams (Yul Brynner), a veteran Cajun gunslinger, and approach him for advice. Chris suggests they instead hire gunfighters to defend the village, as "men are cheaper than guns." At first agreeing only to help them recruit men, Chris eventually decides to lead the group and, despite the meager pay offered, he finds five willing gunmen. Read more on Wikipedia.