John guaranteed for its safe conduct first southeastwards via Lunenburg-Cellean Winsen upon Luhe and Hoopte, crossing the Elbe by Zollenspieker Ferry to the Hamburg-Lübeckian condominial Bergedorf and Vierlande. From there the "Black Guard" headed northwestwards again, through Holstein towards Ditmarsh. Together with his brother Frederick, John then carried out a large-scale campaign with the Black Guard, but the Ditmarsians under Wulf Isebrand's command caught most of the Guard in a trap at the Battle of Hemmingstedt after having opened the dykes of the low-land area and flooded the narrow main road. Thus John's attempt to subject the Ditmarsian free peasants to feudalism ended for time being.