This plan was abandoned after Heridag’s death, and the region came to be assigned to the dioceses of Bremen and Verden during the reign of Emperor Louis the Pious, when Ansgar was appointed Archbishop at Hamburg in 831.
Then Dietrich of Haldensleben proclaimed that "the high-born niece of a great prince may not be given to a dog," whereupon Mstivoj, recruiting the Liutizi to aid him, devastated Nordalbingia with fire and sword.