Margraviate of Brandenburg fief of the Polish–Lithuanian Commonwealth, to which the electors paid homage. The electors of Brandenburg spent the next two centuries attempting to gain lands to unite their separate territories (the Mark Brandenburg, the territories in the Rhineland and Westphalia, and Ducal Prussia) to form one geographically contiguous domain. In the Peace of Westphalia ending the Thirty Years' War in 1648, Brandenburg-Prussia acquired Farther Pomerania and made it the Province of Pomerania by the Treaty of Stettin (1653). In the second half of the 17th century, Frederick William, the "Great Elector", developed Brandenburg-Prussia into a major power. The state constructed Brandenburg's
Piracy in the Caribbean problems at home to turn much attention to their New World colonies. The non-Spanish colonies were growing and expanding across the Caribbean, fueled by a great increase in immigration as people fled from the chaos and lack of economic opportunity in Europe. While most of these new immigrants settled into the West Indies' expanding plantation economy, others took to the life of the buccaneer. Meanwhile, the Dutch, at last independent of Spain when the 1648 Treaty of Westphalia ended their own Eighty Years War (1568–1648) with the Habsburgs, made a fortune carrying the European trade goods needed by these new