Tumbleweed (1953)

Jim Harvey is hired to guard a small wagon train as it makes its way west The train is attacked by Indians and Harvey hoping to persuade Aguila the chief to call off the attack due to Harveys having saved his sons life leaves the train to negotiate He is captured and the rest of the train is wiped out except for two sisters Escaping and showing up in town later Harvey is nearly hanged as a deserter but gets away Eventually caught by the sheriff and his posse they are attacked by Indians This time the Indians are defeated and Aguila captured and dying reveals the identity of the white man who engineered the initial attack on the wagon train just as the perpetrator rides up behind them