They were opposed by a force of Slavs led by Pribislav and the Pomeranian dukes Bogislaw I and Casimir I .
The Christian army was also assisted by a fleet from King Valdemar the Great of Denmark .
army were opposed by a force of Slavs led by Pribislav and the Pomeranian dukes Bogislaw I and Casimir I .
The Christian army was also assisted by a fleet from King Valdemar the Great of Denmark .