 Several British torpedo bombers were built, including the Sopwith Cuckoo, the Short Shirl and the Blackburn Blackburd, but a squadron was assembled so late in the war that it achieved no successes.The United States bought its first 10 torpedo bombers in 1921, variants of the Martin MB-1.The squadron of U.S. Navy and Marine fliers was based at Naval Weapons Station Yorktown.