Dynasty of Blood (1973)

Assassin Chang and his brother Hung meet up with a soldier, Mu. Together, they form a small mountain army, but when Hung's wife arrives, emotions swell, and Mu leaves for the army. After long, Mu summons his friends to join him, but all the while, he has longed for Hung's wife, and tries to have Hung murdered. This treason forces Hung to take up arms against his former comrade.