When the Byzantines failed to aid the revolt , Liuvigild besieged .
When the Byzantines failed to aid the revolt , Liuvigild took Seville and banished his son to Valencia , where he was murdered by Liuvigild 's agents .
When the Byzantines failed to aid the revolt , Liuvigild besieged and took Seville and banished his son to Valencia , where he was murdered by Liuvigild 's agents .