 In 451, the Romans defeated Attila the Hun, but only with assistance from a confederation of "foederatii" troops, which included Visigoths, Franks and Alans.As barbarian incursions continued, some advancing as far as the heart of Italy, Rome's borders began to collapse, with frontier forces swiftly finding themselves cut off deep in the enemy's rear.Simultaneously, barbarian troops in Rome's pay came to be "in a condition of almost perpetual turbulence and revolt" from 409 onwards.