Down to the beginning of the third century the Roman power on the Rhine showed no indications of tottering. During the war with the Marcomani under Marcus all remained quiet in the lower province. If a legate of Belgica had at that time to call out the general levy against the Chauci, this was presumably a piratical expedition, such as often visited the north coast at this time, just as earlier and later. The surge of the great movement of peoples reached to the sources of the Danube and even as far as the region of the Rhine; but it did not shake the foundations there. The Chatti, the only considerable Germanic tribe on the upper German and Raetian border-fence, pushed forward in both directions, and were probably at that time even among the Germans invading Italy, as will be shown further on when we describe this war. At any rate the reinforcement of the Raetian army at that time ordained by Marcus, and its conversion into a command of the first class with legion and legates, can only have taken place in order to check the attacks of the Chatti, and proves that they did not treat them lightly as regards the future. The already-mentioned strengthening of the border-defence would likewise stand connected with this movement. These measures must have sufficed for the next generation. [Sidenote: War with the Alamanni.] [Sidenote: Severus Antoninus.] [Sidenote: Alexander.] Under Antoninus the son of Severus a new and more severe war once more (213) broke out in Raetia. This also was waged against the Chatti; but by their side a second people is named, which we here meet for the first time--the Alamanni. Whence they came, we know not. According to a Roman writing a little later they were a conflux of mixed elements; the appellation also seems to point to a league of communities, as well as the fact that afterwards the different tribes comprehended under this name stand forth--more than is the case among the other great Germanic peoples--in their separate character, and the Juthungi, the Lentienses, and other Alamannic peoples not seldom act independently. But that it is not the Germans of this region who here emerge allied under the new name and strengthened by the alliance, is shown as well by the naming of the Alamanni alongside of the Chatti, as by the mention of the unwonted skilfulness of the Alamanni in equestrian combat. On the contrary it was certainly, in the main, hordes coming on from the East that lent new strength to the almost extinguished German resistance on the Rhine; it is not improbable that the powerful Semnones, in earlier times dwelling on the middle Elbe, of whom there is no further mention after the end of the second century, furnished a strong contingent to the Alamanni. The constantly increasing misgovernment in the Roman empire naturally contributed its share, although only in a secondary degree, to the shifting of power. The emperor took the field in person