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Incursions

Frisians


789. From Aachen a campaign was launched with the help of God into the land of the Slavs who are called Wilzi. On the advice of Franks and Saxons [Charlemagne] crossed the Rhine at Cologne, advanced through Saxony, reached the River Elbe, and had two bridges constructed, on one of which he built fortifications of wood and earth at both ends. From there he advanced further and by the gift of God subjected the Slavs to his authority. Both Franks and Saxons were with him in this army. In addition, the Frisians joined him by ship, on the River Havel, along with some Franks. He also had with him the Slavs called Sorbs and Abodrites, whose chieftain was Witzin.1