Ragnar Lodbrok the Battle of Ashdown on 8 January 871, where Bagsecg was killed. Halfdan accepted a truce from the future Alfred the Great, newly crowned king of Wessex. Halfdan succeeded Bagsecg as King of most of Denmark (Jutland and Wendland) in about 871. Bjorn Ironside became King of Sweden and Uppsala in about 865, (the same year his father Ragnar is said to have died). Bjorn had two sons, Refil and Erik Björnsson. His son Erik became the next king of Sweden, and was succeeded in turn by Erik the son of Refil. Sigurd Snake-in-the-eye became King of Zealand and the
Battle of Stellau Rügen in 1200, followed by an armed conflict in Dithmarschen. Duke Valdemar of Schleswig ordered his army to prepare for war and side with Denmark, ruled by his brother. Adolf led his German army from Holstein to battle in Stellau and crushed the Danes. However, when Adolf and his forces pulled back toward the city of Hamburg, he was besieged, defeated, and captured by Valdemar. In 1202, Valdemar of Schleswig became King Valdemar II of Denmark. His imprisonment of Adolf continued until 1203, when due to an illness, he was freed by the new king on the condition that he