and during the first years of Augustus they were still pushing their way as far as the vicinity of Adrianople. Assuming them to have been one million strong we find that at least six millions was the probable population of Germany at the beginning of the Christian era. After the final settlement in Germany, the population must have grown with increasing rapidity. The industrial progress mentioned above would be sufficient to prove it. The objects found in the bogs of Sleswick, to judge by the Roman coins found with them, are from the third century. Hence at that time the metal and textile industry was already well developed on the Baltic, a lively traffic with the Roman empire was carried on, and the wealthier class enjoyed a certain luxury--all of which indicates that the population had increased. But at the same time the general war of aggression against the Romans commenced along the whole line of the Rhine, of the Roman wall and of the Danube, a line stretching from the North Sea to the Black Sea. This is another proof of the ever growing outward pressure of the population. During the struggle which lasted three centuries, the whole main body of the Gothic nations, with the exception of the Scandinavian Goths and the Burgundians, marched to the Southeast and formed the left wing of the long line of attack. The High Germans (Herminonians) on the Upper Danube fought in the center, and the Iskaevonians on the Rhine, now called Franks, advanced on the right wing. The conquest of Brittany fell to the lot of the Ingaevonians.[33] At the end of the fifth century, the exhausted, bloodless, and helpless Roman empire lay open to the Germans.