The East Germanic subgroup was formed by the tribes who returned from Scandinavia at the beginning of our era. The most numerous and powerful of them were the Goths. They were among the first Teutons to leave the coast of the Baltic Sea and start on their great migrations. Around 200 A. D. they moved south-east and sometime later reached the lower basin of the Danube, where they made attacks on the Eastern Roman Empire, Byzantium. Their western branch, the Visi-gotas, invaded Roman territory, participated in the assaults on Rome under Alaric and moved on to southern Gaul, to found one of the first barbarian kingdoms of Medieval Europe, the Toulouse kingdom. The kingdom lasted until the 8th c. though linguistically the western Goths were soon absorbed by the native population.