(Jan. 21–April 22, 1930) Conference held in London to discuss naval disarmament and review the treaties of the Washington Conference .
Representatives of Britain, the U.S., France, Italy, and Japan agreed to regulate submarine warfare and to place limits on new construction of cruisers, destroyers, submarines, and other warships. A treaty limiting battleship size was not signed, and the treaties renewed in 1935 were canceled on the outbreak of World War II .