quality:corruption
Charlemagne's Saxon Wars

The Saxons were conquered by Charlemagne after a long series of annual campaigns, the Saxon Wars (772 – 804). With defeat came enforced baptism and conversion as well as the union of the Saxons with the rest of the Germanic, Frankish empire. Their sacred tree or pillar, a symbol of Irminsul, was destroyed. Charlemagne deported 10,000 Nordalbingian Saxons to Neustria and gave their largely vacant lands in Wagria (approximately modern Plön and Ostholstein districts) to the loyal king of the Abotrites. Einhard, Charlemagne's biographer, says on the closing of this grand conflict:

The war that had lasted so many years was at length ended by their acceding to the terms offered by the king; which were renunciation of their national religious customs and the worship of devils, acceptance of the sacraments of the Christian faith and religion, and union with the Franks to form one people.

The Saxons long resisted becoming Christians and being incorporated into the orbit of the Frankish kingdom. In 776 the Saxons promised to convert to Christianity and vow loyalty to the king, but, during Charlemagne's campaign in Hispania (778), the Saxons advanced to Deutz on the Rhine and plundered along the river. This was an oft-repeated pattern when Charlemagne was distracted by other matters.