During the third through 6th centuries, the Roman Empire was beset by numerous barbarian invaders, mostly Germanic, who migrated through its borders and began warring and settling in its territories. While the Vandals and Alans were fighting each other for supremacy in southern Gaul, the confederation of the Suevi crossed the Pyrenees and passing through Vasconia, entered Gallaecia in 409. The Vandals soon followed the Suevi example, with the Alans close behind. The Alans settled in Lusitania and Carthaginiensis and the Siling Vandals in Baetica, while the Asding Vandals vied with the Suevi for Gallaecia. The Visigoths crossed the Pyrenees to expand their kingdom in 416. They pushed the Vandals and Alans south, defeating and killing the Alan king Attaces in 426 and forcing the two tribes to amalgamate and retreat across the Straits of Gibraltar into Africa. For almost thirty years, Spain was the location for vicious tribal conflicts.