 This forced Marcellinus to leave Sicily and return to Dalmatia where he would work closely with the Eastern Emperor Leo I.In 464 or 465 Marcellinus returned to Sicily to defend the island against the Vandals, this action posed a direct threat to the personal power and prestige of Ricimer who had already appealed to Leo to prevent Marcellinus from acting against him militarily.Leo recognized Marcellinus as magister militum but not by Ricimer and his new puppet emperor Libius Severus in the West.