For a hundred and fifty years the Romans had been well acquainted with the tribes of the Goths, the most easterly of the Teutonic nations who lay along the imperial border. All through the third century they had been molesting the provinces of the Balkan Peninsula by their incessant raids, as we have already had occasion to relate. Only after a hard struggle had they been rolled back across the Danube, and compelled to limit their settlements to its northern bank, in what had once been the land of the Dacians. The last struggle with them had been in the time of Constantine, who, in a war that lasted from A.D. 328 to A.D. 332, had beaten them in the open field, compelled their king to give his sons as hostages, and dictated his own terms of peace. Since then the appetite of the Goths for war and adventure seemed permanently checked: for forty years they had kept comparatively quiet and seldom indulged in raids across the Danube. They were rapidly settling down into steady farmers in the fertile lands on the Theiss and the Pruth; they traded freely with the Roman towns of Moesia; many of their young warriors enlisted among the Roman auxiliary troops, and one considerable body of Gothic emigrants had been permitted to settle as subjects of the empire on the northern slope of the Balkans. By this time many of the Goths were becoming Christians: priests of their own blood already ministered to them, and the Bible, translated into their own language, was already in their hands. One of the earliest Gothic converts, the good Bishop Ulfilas—the first bishop of German blood that was ever consecrated—had rendered into their idiom the New Testament and most of the Old. A great portion of his work still survives, incomparably the most precious relic of the old Teutonic tongues that we now possess. The Goths were rapidly losing their ancient ferocity. Compared to the barbarians who dwelt beyond them, they might almost be called a civilized race. The Romans were beginning to look upon them as a guard set on the frontier to ward off the wilder peoples that lay to their north and east. The nation was now divided into two tribes: the Visigoths, whose tribal name was the Thervings, lay more to the south, in what are now the countries of Moldavia, Wallachia, and Southern Hungary; the Ostrogoths, or tribe of the Gruthungs, lay more to the north and east, in Bessarabia, Transylvania, and the Dniester valley. But a totally unexpected series of events were now to show how prescient Constantine had been, in rearing his great fortress-capital to serve as the central place of arms of the Balkan Peninsula.