The sack of Rome in 455 was carried out by the Vandals led by their king Gaiseric. A 442 treaty between the Western Roman Empire and Vandal Kingdom included a marriage of state between the daughter of Roman Emperor Valentinian III and the son of Gaiseric. Valentinian's successor Petronius Maximus violated the treaty by marrying his son to Valentinian's daughter, and Gaiseric retaliated with an invasion of Italy.

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