In 376, a large band of Goths asked Emperor Valens for permission to settle on the southern bank of the Danube River on terms similar to the Franks. The Goths were also accepted into the empire as "foederati"; however, they rebelled later that year and defeated the Romans at the Battle of Adrianople. The heavy losses that the Roman military suffered during this defeat ironically forced the Roman Empire to rely still further on such "foederati" troops to supplement its forces. In 382, the practice was radically extended when federated troops were signed up "en masse" as allied contingents of "laeti" and "foederatii" troops separate from existing Roman units. Near-constant civil wars during the period 408 and 433 between various Roman usurpers, emperors and their supposed deputies such as Constantine III, Constantius III, Aetius and Bonifacius resulted in further losses, necessitating the handing over of more taxable land to foederati.