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
Treaty of Paris (1815) at accumulating interest for the benefit of the creditors. As soon as the inscription had been effected, Britain would restore the French colonies as agreed in the treaty of 1814, including the islands of Martinique and Guadeloupe, provisionally re-occupied by the British troops. The Swiss Confederation had been internationally recognised as an independent neutral state at the Peace of Westphalia in 1648. During the Napoleonic Wars it failed to remain neutral, as some cantons had been annexed into other states and, under French influence, the Act of Mediation was signed and the Swiss Confederation was replaced by the more centralised