London Naval Treaty

London Naval Treaty

International Treaty for the Limitation and Reduction of Naval Armament
Members of the United States delegation en route to the conference, January 1930
Type	Arms control
Context	World War I
Signed	22 April 1930 (1930-04-22)
Location	London
Effective	27 October 1930 (1930-10-27)
Expiration	31 December 1936 (1936-12-31) (Except for Part IV)
Negotiators	Henry L. Stimson Ramsay MacDonald André Tardieu Dino Grandi Wakatsuki Reijirō
Signatories	Herbert Hoover George V Gaston Doumergue Victor Emmanuel III Hirohito
Parties	United States  British Empire  French Third Republic  Kingdom of Italy  Empire of Japan
Depositary	League of Nations
Language	English

The London Naval Treaty, officially the Treaty for the Limitation and Reduction of Naval Armament, was an agreement between the United Kingdom, Japan, France, Italy, and the United States that was signed on 22 April 1930. Seeking to address issues not covered in the 1922 Washington Naval Treaty, which had created tonnage limits for each nation's surface warships, the new agreement regulated submarine warfare, further controlled cruisers and destroyers, and limited naval shipbuilding.

Ratifications were exchanged in London on 27 October 1930, and the treaty went into effect on the same day, but it was largely ineffective.^[1]

The treaty was registered in League of Nations Treaty Series on 6 February 1931.^[2]