Genseric's son. Before this treaty could be carried out, however, politics again played a crucial part in the blunders of Rome. Petronius Maximus killed Valentinian III and claimed the Western throne. Petronius then forced Valentinian III's widow, empress Licinia Eudoxia, to marry him. Diplomacy between the two factions broke down, and in 455 with a letter from Licinia Eudoxia, begging Genseric's son to rescue her, the Vandals took Rome, along with the Empress and her daughters Eudocia and Placidia. The chronicler Prosper of Aquitaine offers the only fifth-century report that, on 2 June 455, Pope Leo the Great received Genseric and implored him to abstain from murder and destruction by fire, and to be satisfied with pillage. Whether the pope's influence saved Rome is, however, questioned. The Vandals departed with countless valuables. Eudoxia and her daughter Eudocia were taken to North Africa. Consolidation In 456 a Vandal fleet of 60 ships threatening both Gaul and Italy was ambushed and defeated at Agrigentum and Corsica by the Western Roman general Ricimer. In 457 a mixed Vandal-Berber army returning with loot from a raid in Campania were soundly defeated in a surprise attack by Western Emperor Majorian at the mouth of the Garigliano river. As a result of the Vandal sack of Rome and piracy in the Mediterranean, it became important to the Roman Empire to destroy the Vandal kingdom. In 460, Majorian launched an expedition against the Vandals, but was defeated at the Battle of Cartagena. In 468 the Western and Eastern Roman empires launched an enormous expedition against the Vandals under the command of Basiliscus, which reportedly was composed of 100,000 soldiers and 1,000 ships. The Vandals defeated the invaders at the Battle of Cap Bon, capturing the Western fleet, and destroying the Eastern through the use of fire ships. Following up the attack, the Vandals tried to invade the Peloponnese, but were driven back by the Maniots at Kenipolis with heavy losses. In retaliation, the Vandals took 500 hostages at Zakynthos, hacked them to pieces and threw the pieces overboard on the way to Carthage. In 469 the Vandals gained control of Sicily but were forced by Odoacer to relinquish it in 477 except for the western port of Lilybaeum (lost in 491 after a failed attempt on their part to re-take the island). In the 470s, the Romans abandoned their policy of war against the Vandals. The Western