Arthur E. R. Boak, A History of Rome to 565 A. D
“ Recruited, as the latter now were, almost entirely from the frontiers of the Roman world, they felt no community of interest with the inhabitants of the peaceful provinces and turned upon them, like unfaithful sheep dogs upon the flocks whom it was their duty to guard. The sole object of the troops was to enrich themselves by plunder and the extortion of high pay and frequent largesses from the emperor whom they supported. Hence, in the expectation of fresh rewards, each army hailed as Imperator the commander who had led it to victory over foreign foes or revolting soldiers of Rome. ”
