At the conclusion of World War II, Turkey was pressured by the Soviet government to allow Russian shipping to pass freely through the Turkish Straits, which connected the Black Sea to the Mediterranean. As the Turkish government would not submit to the Soviet Union's requests, tensions arose in the region and led to a show of naval force from the Soviets. Since British assistance to Turkey had ended in 1947, the U.S. dispatched military aid to ensure that Turkey would retain chief control of the passage. Turkey received $111 million in economic and military aid and the U.S sent the aircraft carrier "Franklin D. Roosevelt".