A few years later (A.D. 269) the Goths began a systematic invasion of the Balkan provinces of the Roman Empire, attacking the Roman territory both by sea and by land. The tide of victory sometimes turned for a while, and at Naissus (now Nish in Servia, near the border of Bulgaria) the Goths were defeated by the Emperor Claudius. Their defeated army was then shut up in the Balkan Mountains for a winter, and the Gothic power in the Balkans temporarily crushed. The Emperor Claudius, who took the surname Gothicus in celebration of his victory, announced it grandiloquently to the governor of Illyricum: _Claudius to Brocchus._ We have destroyed 320,000 of the Goths; we have sunk 2000 of their ships. The rivers are bridged over with shields; with swords and lances all the shores are covered. The fields are hidden from sight under the superincumbent bones; no road is free from them; an immense encampment of waggons is deserted. We have taken such a number of women that each soldier can have two or three concubines allotted to him. [Illustration: IN THE HARVEST FIELDS NEAR SOFIA] But the succeeding Emperor, Aurelian, gave up all Dacia to the Goths and withdrew the Romanised Dacians into the province of Moesia--made up of what is now Eastern Servia and Western Bulgaria. This province was divided into two and renamed Dacia. One part, Dacia Mediterranea, had for its capital Sardica, now Sofia, the capital of Bulgaria. Then followed a period of comparative peace. The Roman emperors saw that on the Balkan frontier their Empire had to be won or lost, and strengthened the defences there. Thus Diocletian made his headquarters at Nicomedia. Finally, Constantine moved the capital altogether to Constantinople. Goth and Roman at this time showed a disposition to a peaceful amalgamation, and the Bulgarian population was rapidly becoming a Romano-Gothic one. Christianity had been introduced, and the Gothic historian Jordanes tells of a Gothic people living upon the northern side of the Balkan Mountains: There were also certain other Goths, who are called Minores, an immense people, with their bishop and primate Vulfila, who is said, moreover, to have taught them letters; and they are at this day dwelling in Moesia, in the district called Nicopolitana[1] at the foot of Mount Haemus, a numerous race, but poor and unwarlike, abounding only in cattle of divers kinds, and rich in pastures and forest timber, having little wheat, though the earth is fertile in producing other crops. They do not appear to have any vineyards: those who want wine buy it of their neighbours; but most of them drink only milk. [1] Around the modern town of Tirnova.