Albert the Bear was the first margrave of Brandenburg from 1157 to his death and was briefly duke of Saxony between 1138 and 1142.

The Wendish Crusade was a military campaign in 1147, one of the Northern Crusades, led primarily by the Kingdom of Germany within the Holy Roman Empire and directed against the Polabian Slavs. The Wends were made up of the Slavic tribes of Abrotrites, Rani, Liutizians, Wagarians, and Pomeranians who lived east of the River Elbe in present-day northeast Germany and Poland.