I say “in the natural course of things.” Dreadful as the irruption of barbarians into civilized places must always be, even on a small scale, the _conquest_ of civilization by barbarians is always and necessarily impossible. Barbarians may have the weight to _destroy_ the civilization they enter, and in so doing to destroy themselves with it. But it is inconceivable that they should impose their view and manner upon civilized men. Now to impose one’s view and manner, _dare leges_ (to give laws), is to conquer. Moreover, save under the most exceptional conditions, a civilized army with its training, discipline and scientific traditions of war, can always ultimately have the better of a horde. In the case of the Roman Empire the armies of civilization did, as a fact, always have the better of the barbarian hordes. Marius had the better of the barbarians a hundred years before Our Lord was born, though their horde was not broken until it had suffered the loss of 200,000 dead. Five hundred years later the Roman armies had the better of another similar horde of barbarians, the host of Radagasius, in their rush upon Italy; and here again the vast multitude lost some 200,000 killed or sold into slavery. We have seen how the Roman generals, Alaric and the others, destroyed them. But we have also seen that within the Roman Army itself certain auxiliary troops (which may have preserved to some slight extent traces of their original tribal character, and probably preserved for a generation or so a mixture of Roman speech, camp slang, and the original barbaric tongues) assumed greater and greater importance in the Roman Army towards the end of the imperial period—that is, towards the end of the fourth, and in the beginning of the fifth, centuries (say, 350-450). We have seen why these auxiliary forces continued to increase in importance within the Roman Army, and we have seen how it was only as Roman soldiers, and as part of the regular forces of civilization, that they had that importance, or that their officers and generals, acting as _Roman_ officers and generals, could play the part they did. The heads of these auxiliary forces were invariably men trained as Romans. They knew of no life save that civilized life which the Empire enjoyed. They regarded themselves as soldiers and politicians of the State _in_ which—not _against_ which—they warred. They acted wholly within the framework of Roman things. The auxiliaries had no memory or tradition of a barbaric life beyond the Empire, though their stock in some part sprang from it; they had no liking for barbarism, and no living communication with it. The auxiliary soldiers and their generals lived and thought entirely within those imperial boundaries which guarded paved roads, a regular and stately architecture, great and populous cities, the vine, the olive, the Roman law and the bishoprics of the Catholic Church. Outside was a wilderness with which they had nothing to do.