Query: Which Germanic tribe did the Huns cooperate with?
Context: Migrating Germanic tribes commingled with the local Gallo-Roman populations in what is now Swabia and Bavaria. The arrival of the Huns in Europe resulted in Hun conquest of large parts of Eastern Europe, the Huns initially were allies of the Roman Empire who fought against Germanic tribes, but later the Huns cooperated with the Germanic tribe of the Ostrogoths, and large numbers of Germans lived within the lands of the Hunnic Empire of Attila. Attila had both Hunnic and Germanic families and prominent Germanic chiefs amongst his close entourage in Europe.