The US accepted the "generous action… to enhance the national security of the United States" and immediately transferred in return 50 "Caldwell", "Wickes", and "Clemson"-class U.S. Navy destroyers, "generally referred to as the twelve hundred-ton type" (also known as "flush-deckers", or "four-pipers" after their four funnels). Forty-three ships initially went to the British Royal Navy and seven to the Royal Canadian Navy. In the Commonwealth navies, the ships were renamed after towns, and were therefore known as the "Town" class, although they had originally belonged to three classes ("Caldwell", "Wickes", and "Clemson"). Before the end of the war, nine others also served with the Royal Canadian Navy. Five Towns were manned by Royal Norwegian Navy crews, with the survivors later returned to the Royal Navy. was manned by Royal Netherlands Navy sailors before her assignment to the St. Nazaire Raid. Nine other destroyers were eventually transferred to the Soviet Navy. Six of the 50 destroyers were lost to U-boats, and three others, including "Campbeltown", were destroyed in other circumstances.