Pomerania

The Duchy of Pomerania lay on the southern Baltic coast and grew from the lands of the Slavic duke Wartislaw I. His Griffin descendants repeatedly divided their territories, which included Rügen after 1325; the duchy was united again from 1478 to 1531.

Bogislaw XIV reunited Pomerania in 1625, but imperial troops entered his lands during the Thirty Years' War in 1627. He died without a male heir in 1637, and the Peace of Westphalia divided Pomerania between Sweden and Brandenburg in 1648.