 The port was part of a strategic trade route, and Gudfred destroyed the town and forced the merchants to resettle at Hedeby (in Danevirke).In 810, Thrasco was murdered by a vassal of Gudfred in Reric.The Frankish subjects in the frontiers were quiet for a decade, then the Sorbs revolted in 816, and were quickly followed by the Obotrites, led by Slavomir, Thrasco's successor.