The Deadly Companions (1961)

The veteran Civil War Yankee officer Yellowleg saves the cheater Turk in a card game, and together with the gunslinger Billy Keplinger, they ride together to Gila City with the intention of heisting a bank. Yellowleg has a war scar on the head from a man that tried to scalp him and he has been on the trail of his attacker for five years. When bandits rob a store, Yellowleg shoots at the outlaws and accidentally kills the son of the cabaret dancer Kit Tilden and the grieving woman decides to bury her son in the Apache country Siringo, where her husband is also buried. Yellowleg calls Billy and Turk to escort Kitty through the dangerous land.