The Comancheros
In 1843 roguish gambler Paul Regret (Stuart Whitman) escapes a death penalty after killing in a duel Emil Bouvier (Gregg Palmer), the son of a Louisiana judge. Regret claimed that he would have only wounded Bouvier if he hadn't sidestepped. He is captured by Texas Ranger Jake Cutter (John Wayne) after a tryst with a mysterious lady, Pilar Graile (Ina Balin). Regret manages to escape, but is subsequently recaptured after a chance encounter with Cutter in a saloon.
In the process of returning Regret to Louisiana, Cutter is forced to join forces with the condemned to fight the "Comancheros", a large criminal gang headed by a former officer that smuggles guns and whiskey to the Comanche Indians to make money and keep the frontier in a state of violence. Cutter stops at a ranch owned by a friend when there is a sudden Comanche attack. During the attack Regret jumps on a horse and flees, but instead of making a clean getaway he soon returns with a unit of Texas Rangers and the attack is repulsed.
Eventually they infiltrate the self-sufficient Comanchero community at the bottom of a valley in the desert. Pilar reappears as the daughter of the wheelchair-bound but ruthless leader Graile (Nehemiah Persoff). After Cutter and the other Texas Rangers defeat both the Comanches and Comancheros, Regret and Pilar leave together for Mexico and Jake rides off into the sunset.
violence