What is "obotrites"

The Obotrites or Obodrites ( meaning: at the waters), also spelled Abodrites , were a confederation of medieval West Slavic tribes within the territory of modern Mecklenburg and Holstein in northern Germany (see Polabian Slavs). For decades they were allies of Charlemagne in his wars against the Germanic Saxons and the Slavic Veleti. The Obotrites under prince Thrasco defeated the Saxons in the Battle of Bornhöved (798). The still heathen Saxons were dispersed by the emperor, and the part of their former land in Holstein north of Elbe was awarded to the Obotrites in 804, as a reward for their victory. This however was soon reverted through an invasion of the Danes. The Obotrite regnal style was abolished in 1167, when Pribislav was restored to power by Duke Henry the Lion, as Prince of Mecklenburg, thereby founding the German House of Mecklenburg.