Pushed westwards by the Huns around 400, the Vandals crossed the Rhine into Gaul in 406 and the Pyrenees into Iberia in 409. While the other main Vandal group, the Hasdingi, settled in Gallaecia, the Silingi settled in Baetica. In 419, following Roman-sponsored attacks by the Visigoths against the Silingi in 417-18, the remnants of Silingi and the Alans voluntarily subjected to the rule Hasdingian leader Gunderic, who had fled from Gallaecia to Baetica after having been defeated by a Roman-Suebi coalition. After Gunderic's succession by Genseric in 428, the Vandals relocated to North Africa, where they established a kingdom centered at Carthage. The kingdom collapsed in the Vandalic War of 533–4, in which Justinian I managed to reconquer the Africa province for the Eastern Roman (Byzantine) Empire.