Dominions of Sweden German principalities, the Swedish kings in their roles as princes and dukes, or "Reichsfürsten", of the Holy Roman Empire took part in the German diets from 1648 until the dissolution of the Holy Roman Empire in 1806. Following the Thirty Years' War, the Peace of Westphalia in 1648 assigned to Sweden the two bishoprics of Bremen-Verden, with the exclave of Wildeshausen. All of them were ceded to Hanover in the peace treaty of 1719. By the Peace of Westphalia in 1648 Sweden received Swedish Pomerania, situated along the German Baltic Sea coast. The whole Duchy of Pomerania was under Swedish
Treaty of Mutual Cooperation and Security Between the United States and Japan To support that requirement, it provided for the continued presence of US military bases in Japan. The treaty also included general provisions on the further development of international cooperation and on improved future economic cooperation. The treaty has lasted longer than any other alliance between two great powers since the 1648 Peace of Westphalia. The treaty had a minimum term of 10 years. However, it provided that it would remain in force permanently unless one party gives one year's notice that it wishes to terminate it. The earlier Security Treaty of 1951 provided the initial basis for the Japan's security