Lexington Class (CC-1 through CC-6)Battle Cruiser Artwork by F. Muller, circa 1919, depicting the definitive design for these ships, whose construction was cancelled under the Washington Naval Limitations Treaty of 1922. U.S. Naval History and Heritage Command Photograph. Catalog #: NH 61245
At the end of World War II, Allied Occupation forces found hundreds of midget submarines built and building in Japan, including large numbers of the "Koryu" type. Many of these boats were in massed groups at shipyards and naval bases.