814 - The battle for the throne continued

Harald Klak and Reginfred tried another comeback but was defeated and Reginfred was killed, also one of the older sons of Godfred was slain in the battle.

Harald Klak got refuge with the Obotrites and Charlemagne promised to help, but the emperor died of pleurisy in Aachen 71 years old shortly after he made the promise. His son Louis the pious renewed the promise of Charlemagne.
Vikings may have been part of a group which settled in parts of the Basque country about 814 and stayed until 825, when they were defeated by the Arabs in a battle in Altamira.They had established a lucrative trading post beside the Urdaibai Estuary.
Urdurbai estate Spain