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The Second London
London
Naval Treaty was an international treaty signed as a result of the Second London
London
Naval Disarmament Conference held in London, the United Kingdom. The conference started on 9 December 1935 and treaty was signed by the participating nations on 25 March 1936.

Contents

1 Treaty 2 See also 3 Footnotes 4 References 5 External links

Treaty[edit] The signatories were France, the United Kingdom
United Kingdom
and its Dominions, and the United States of America. Japan, a signatory of the First London Naval Treaty, withdrew from the conference on 15 January. Italy
Italy
also declined to sign the treaty, largely as a result of the controversy over its invasion of Abyssinia (Ethiopia); Italy
Italy
was under sanctions from the League of Nations. The conference was intended to limit the growth in naval armaments until its expiration in 1942. The absence of Japan (a very significant naval power) prevented agreement on a ceiling on the numbers of warships. The treaty did limit the maximum size of the signatories' ships, and the maximum calibre of the guns which they could carry. First of all, capital ships were restricted to a 35,000 long tons (35,562 t) standard displacement and 14-inch (356 mm) guns.[1] However, a so-called "escalator clause" was included at the urging of American negotiators in case any of the countries that had signed the Washington Naval Treaty
Washington Naval Treaty
refused to adhere to this new limit. This provision allowed the signatory countries of the Second London
London
Treaty—France, the United Kingdom
United Kingdom
and the United States—to raise the limit from 14-inch guns to 16-inch if Japan or Italy
Italy
still refused to sign after 1 April 1937.[2] Also submarines could not be larger than 2,000 tons or have any gun armament of greater than 5.1-inches, light cruisers were restricted to 8,000 tons and 6.1-inch (155 mm) or smaller guns and aircraft carriers were restricted to 23,000 tons. Article 25 however gave the right to depart limitations if any other country authorised, constructed or acquired a capital ship, an aircraft carrier, or a submarine exceeding treaty limits, if such a departure would be necessary for the national security. For this reason, in 1938 the treaty parties agreed on a new displacement limit of 45,000 tons for battleships. This London
London
Naval Treaty effectively ended on 1 September 1939 with the beginning of World War II. Even during its brief period of supposed effectiveness, its clauses were honoured more in the breach than in the observance. Three classes of "treaty" battleships were built or laid down by the United States: the North Carolina, South Dakota, and Iowa classes. The design of the North Carolina class was initiated before the escalator clause was invoked, being intended to be armed with, and protected against, 14-inch guns. However, with the invocation of the escalator clause, they were completed with 16-inch guns. The four battleships of the South Dakota class were designed with and protected against 16-inch guns, but maintained a 35,000 ton standard displacement. Design of the Iowa-class began in 1938 and they were ordered in 1939; with the treaty no longer effective carried 16-inch guns on a displacement of 45,000 tons. Article 22 of the 1930 Treaty of London
London
relating to submarine warfare declared international law (the so-called "cruiser rules") applied to submarines as well as to surface vessels. Also, unarmed merchant vessels which did not demonstrate "persistent refusal to stop...or active resistance to visit or search"[3] could not be sunk without the ships' crews and passengers being first delivered to "a place of safety" (for which lifeboats did not qualify, except under particular circumstances).[4] The 1936 treaty confirmed Article 22 of the 1930 treaty remained in force, and "all others Powers [were invited] to express their assent to the rules embodied in this Article".[5][6] This became known as the London
London
Submarine
Submarine
Protocol, and over thirty-five nations eventually did subscribe to it, including the U.S., Britain, Germany, and Japan.[7] It was this Protocol which was used at the post war Nuremberg Trial of Karl Dönitz
Karl Dönitz
for ordering unrestricted submarine warfare. These regulations did not prohibit arming merchantmen,[8] but arming them, or having them report contact with submarines (or raiders), made them de facto naval auxiliaries and removed the protection of the cruiser rules.[9] This made restrictions on submarines effectively moot.[10] See also[edit]

Washington Naval Treaty, preceding treaty London
London
Naval Treaty, preceding treaty Anglo-German Naval Agreement

Footnotes[edit]

^ Treaty text. Article 4 ^ Muir, "Gun Calibers and Battle Zones", 25 ^ Holwitt, Joel I. "Execute Against Japan", PhD dissertation, Ohio State University, 2005, p.93. ^ Holwitt, p.92: quoting Article 22 of the London
London
Naval Treaty. ^ Treaty for the Limitation and Reduction of Naval Armaments, (Part IV, Art. 22, relating to submarine warfare). London, 22 April 1930 ^ Procès-verbal relating to the Rules of Submarine
Submarine
Warfare set forth in Part IV of the Treaty of London
London
of 22 April 1930. London, 6 November 1936 ^ Holwitt, pp.94–95. ^ Holwitt, p.6. ^ Dönitz, Karl. Memoirs: Ten Years and Twenty Days; von der Poorten, Edward P. The German Navy in World War II
World War II
(T. Y. Crowell, 1969); Milner, Marc. North Atlantic run : the Royal Canadian Navy and the battle for the convoys (Vanwell Publishing, 2006) ^ Holwitt, p.6.

References[edit]

Dönitz, Karl. Memoirs: Ten Years and Twenty Days. 1952. Holwitt, Joel I. "Execute Against Japan", PhD dissertation, Ohio State University, 2005, p. 93. Milner, Marc. North Atlantic run : the Royal Canadian Navy and the battle for the convoys. St. Catharines, Ontario: Vanwell Publishing, 2006. Muir Jr., Malcolm. "Gun Calibers and Battle Zones: The United States Navy's Foremost Concern During the 1930s." Warship International no. 1 (1980): 24–35. ISSN 0043-0374 OCLC 1647131 Von der Poorten, Edward P. The German Navy in World War II. New York: T. Y. Crowell, 1969

External links[edit]

Full text of the Treaty

v t e

Interwar Naval Arms Limitation

Washington Treaty (1922) Geneva Conference (1927) London
London
Treaty (1930) Geneva Conference (1932) World Disarmament Conference Anglo-German Agreement (1935) London
London
Treaty (1936)

v t e

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