sentences:  Cyaxares was succeeded by his son King Astyages.In 553 BC, his maternal grandson Cyrus the Great, the King of Anshan/Persia, a Median vassal, revolted against Astyages.In 550 BC, Cyrus finally won a decisive victory resulting in Astyages' capture by his own dissatisfied nobles, who promptly turned him over to the triumphant Cyrus.