He ruled Pomerania-Stettin in the years 1344–1368, although he had been a co-regent of his father Otto I since 1320, taking a prominent part in the defence and government of the duchy. Aiming for independence from the Margraviate of Brandenburg, he allied himself with Poland and Bohemia.
He governed Pomerania-Stettin from 1344 to 1368, although he had been a co-ruler of his father Otto I since 1320, playing a key role in the defense and administration of the duchy. He sought to break free from the Margraviate of Brandenburg's influence by forming an alliance with Poland and Bohemia.