Why was Stettin important to Frederick William’s plans for Brandenburg?

Stettin was of critical importance to Frederick William’s plans for Brandenburg because of its strategic location at the estuary of the Oder River.1

As the elector sought to expand his influence and consolidate his territories, acquiring the important harbour of Stettin was a primary objective to secure control over this vital waterway. During the negotiations for the Peace of Westphalia in 1648, Frederick William aimed to acquire all of Pomerania, including the city of Stettin, to enhance the economic and military standing of his domain.12

Ultimately, he was unsuccessful in this specific goal at the time, as Sweden secured western Pomerania and Stettin, thereby gaining control over the Oder estuary. This loss remained a significant point of contention in his broader efforts to establish Brandenburg-Prussia as a leading European power.123