The (Baba twelfth lunar month 22), January 21, 1930, the opening of the London Naval Conference.

1930 1 21, British, American, Japanese, French, Italian 5 held in London Naval Conference to discuss the reduction of armaments and international issues. (L $ dj��.c��m)
meeting, Japan proposed that it is entitled to have a heavy cruiser and a number of other auxiliary ships, should be equivalent to the U.S. 70% of the total tonnage of the ships. By the United States against it. Britain, the United States put forward the initiative to repeal submarine warfare, Japan, France, Italy, has also been refused. The meeting concluded on April 22 signed the London Naval Convention, reiterated that the Anglo-American Day battleship proportion remains 5:5:3; provisions destroyers proportion 5:5:3.5; complete equality in submarines. The Convention also include the British insisted telescopic terms, which provides that any one of the three signatory country can be changed after informing it that the country under the conditions of the national security needs, each shipbuilding plans. France, Italy and China refused to accept the Convention.
after the First World War, Britain and the United States, Japan and other powers compete for maritime supremacy launched a fierce naval arms race, cut the Navy became the major international issues of national attention, and thus held a series of international meetings .