The Savage Guns ( Tierra Brutal )

From Wikipedia.org: The film takes place in a small valley in the Mexican state of Sonora, near the Arizona Territory, around 1870. Steve Fallon, a drifter and gun-for-hire, is seriously wounded while on the trail and is found by Mike Summers and his wife, Franchea. He is taken into their home and, while recovering, he learns that a local land baron, Ortega, is pressuring local ranchers to sell their land to him with the help of Danny Pose and his gang of outlaws. Fallon also develops feelings for Fanchea's sister, Juana. Mike Summers, a former Confederate officer, had become a pacifist following his experiences during the American Civil War. Refusing to even wear a gun, he is defenseless when Danny Pose arrives at the ranch to collect "protection" money. Confronted by Fallon, Pose is disarmed and loses to Fallon in a brawl. He is eventually run out of town after a gunfight with Fallon ends with three of his companions dead.