{{Short description|1930 international arms control treaty}}{{For|the 1936 treaty|Second London Naval Treaty}}{{Use dmy dates|date=May 2017}}{{Use British English|date=May 2017}}

factoids

name

London| date_sealed =

Henry L. Stimson

{{flagicon|British Empire}} Ramsay MacDonald

{{flagicon|Kingdom of Italy}} Dino Grandi

{{flagicon|Empire of Japan}} Wakatsuki ReijirÅ| signatories =

{{flagicon|United States|1912}} Herbert Hoover

{{flagicon|British Empire}} George V

{{flagicon|French Third Republic}} Gaston Doumergue

{{flagicon|Kingdom of Italy}} Victor Emmanuel III

{{flagicon|Empire of Japan}} Hirohito| parties =

{{flag|Empire of Japan}}| ratifiers = | depositor = League of Nations| citations =

English language>English| wikisource = }}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.John Maurer, and Christopher Bell, eds. At the crossroads between peace and war: the London Naval Conference in 1930 (Naval Institute Press, 2014).The treaty was registered in League of Nations Treaty Series on 6 February 1931.League of Nations Treaty Series, vol. 112, pp. 66â€“96.

Conference

(File:Londonnavalconference2.jpg|thumb|right|Menu and List of Official Toasts at formal dinner which opened the London Naval Conference of 1930)The signing of the treaty remains inextricably intertwined with the ongoing negotiations, which began before the official start of the London Naval Conference of 1930, evolved throughout the progress of the official conference schedule, and continued for years afterward.

Terms

The treaty was seen as an extension of the conditions agreed in the Washington Naval Treaty, an effort to prevent a naval arms race after World War I.The conference was a revival of the efforts that had gone into the 1927 Geneva Naval Conference at which the various negotiators had been unable to reach agreement because of bad feelings between the British and the American governments. The problem may have initially arisen from discussions held between US President President Herbert Hoover and UK Prime Minister Ramsay MacDonald at Rapidan Camp in 1929, but a range of factors affected tensions, which were exacerbated by the other nations at the conference.Steiner, Zara S. (2005). The Lights that Failed: European International History 1919â€“1933, pp. 587-591.Under the treaty, the standard displacement of submarines was restricted to 2,000 tons, with each major power being allowed to keep three submarines of up to 2,800 tons except that France was allowed to keep one. The submarine gun caliber was also restricted for the first time to {{convert|6.1|in|0|abbr=on}} with one exception, an already-constructed French submarine being allowed to retain {{convert|8|in|0|abbr=on}} guns. That put an end to the 'big-gun' submarine concept pioneered by the British M class and the French Surcouf.The treaty also established a distinction between cruisers armed with guns up to {{convert|6.1|in|0|abbr=on}} ("light cruisers" in unofficial parlance) from those with guns up to {{convert|8|in|0|abbr=on}} ("heavy cruisers"). The number of heavy cruisers was limited: Britain was permitted 15 with a total tonnage of 147,000, the Americans 18 totalling 180,000, and the Japanese 12 totalling 108,000 tons. For light cruisers, no numbers were specified but tonnage limits were 143,500 tons for the Americans, 192,200 tons for the British, and 100,450 tons for the Japanese.WEB, U.S. Department of State, The London Naval Conference, 1930,weblink 20 March 2014, Destroyer tonnage was also limited, with destroyers being defined as ships of less than 1,850 tons and guns up to {{convert|5.1|in|0|abbr=on}}. The Americans and the British were permitted up to 150,000 tons and Japan 105,500 tons.Article 22 relating to submarine warfare declared international law applied to them as to surface vessels. Also, merchant vessels that demonstrated "persistent refusal to stop" or "active resistance" could be sunk without the ship's crew and passengers being first delivered to a "place of safety."WEB,weblink Treaty for the Limitation and Reduction of Naval Armaments, (Part IV, Art. 22, relating to submarine warfare). London, 22 April 1930, 13 March 2006, 31 July 2012,weblink" title="web.archive.org/web/20120731025604weblink">weblink dead, Article 8 outlined smaller surface combatants. Ships between 600 and 2,000 tons, with guns not exceeding {{convert|6|in|0|abbr=on}} with a maximum of four gun mounts above {{convert|3|in|0|abbr=on}} without torpedo armament and up to {{convert|20|kn|km/h|0|abbr=on}}, were exempt from tonnage limitations. The maximum specifications were designed around the French Bougainville-class avisos, which were in construction at the time.{{cn|date=February 2023}}Warships under 600 tons were also completely exempt. That led to creative attempts to use the unlimited nature of the exemption with the Italian Spica-class torpedo boats, Japanese Chidori-class torpedo boats, French La MelpomÃ¨ne-class torpedo boats and British Kingfisher-class sloops.BOOK, John, Jordan, Warship 2016, Conway, 978-1-84486-326-6, 8â€“10, Warship 2016, 13 September 2016,

Aftermath

The next phase of attempted naval arms control was the Second Geneva Naval Conference in 1932. That year, Italy "retired" two battleships, twelve cruisers, 25 destroyers and 12 submarines; in all, 130,000 tons of naval vessels were scrapped or put into reserve."Italy Will Retire 130,000 tons of Navy; Two Battleships, All That She Owns, Are Included in the Sweeping Economy Move. Four New Cruisers to go [plus Eight Old Ones, 25 Destroyers and 12 Submarines Also to Be Taken Out of Service"]. New York Times. 18 August 1932. Active negotiations among the other treaty signatories continued during the following years."Naval Men See Hull on the London Talks; Admiral Leigh and Commander Wilkinson Will Sail Today to Act as Advisers". New York Times. 9 June 1934.That was followed by the Second London Naval Treaty of 1936.

Notes

External links

Text of the treaty

{{Interwar Naval Arms Limitation|state=expanded}}{{Herbert Hoover}}{{Ramsay MacDonald|state=collapsed}}{{Authority control}}

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