Bolesław I Chrobry
In the late 10th century, the Polish dukes Mieszko I and Bolesław I Chrobry subdued parts of Pomerania and also fought the Wolinians. Much of Wolin was destroyed in 1043 by Dano-Norwegian King Magnus the Good, who however failed to conquer its center. Also in the mid-11th century, export and wealth were greatly reduced, in part due to the breakdown of the Polish market. Yet the Wolinians retained their independence and continued to house refugees from the Danish opposition, causing Danish king Erik I Evergood to mount another campaign in 1098.