Which warrior?

A burned-out warrior rides into a small town and stays with a peasant family. The little boy asks to be trained by the warrior. Their training session is stopped by parents. Sexual tension is obvious between the mother and the warrior, but she stays committed to her husband. Bad guys try to intimidate the peasant family, breaking their equipment and eventually burning down a house. The boy watches his hero in a bar fight with thugs. Later the bad guys hire a skilled rival warrior to kill the hero and chase off the peasants. The warriors know each other. Their final confrontation takes place in a bar. As the hero leaves, the little boy runs after him shouting his name.

That description fits the 1953 Western Shane and the 2013 martial arts movie Once Upon A Time in Vietnam.