Yao's Young Warriors (1983)

Hong Kong martial arts action,set during the last days of the Sung dynasty as Chin forces overrun the countryside. Only esteemed general Yao has managed to hold out,beseiged by the Chin armies. When the Chin kidnap Yao's mother in order to force him to surrender,they hadn't reckoned with Yao's five sons,who use their martial arts skills to devastating effect.