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This was a naval code used by merchant ships (commonly known as the "maru code"), [22] broken in May 1940. 28 May 1941, when the whale factory ship Nisshin Maru No. 2 (1937) visited San Francisco, U.S. Customs Service Agent George Muller and Commander R. P. McCullough of the U.S. Navy's 12th Naval District (responsible for the area) boarded her ...
Japanese army and diplomatic codes. This article is on Japanese army and diplomatic ciphers and codes used up to and during World War II , to supplement the article on Japanese naval codes . The diplomatic codes were significant militarily, particularly those from diplomats in Germany.
The Japanese Navy enjoyed spectacular success during the first part of the hostilities, but American forces ultimately managed to gain the upper hand through decrypting the Japanese naval codes, exploiting the aforementioned Japanese neglect of fleet defense, technological upgrades to its air and naval forces, superior personnel management such ...
Construction of the cruiser Tone was authorized under the "Circle-2 Plan". The 2nd Naval Armaments Supplement Programme (マル2計画, 第二次補充計画, Maru 2 Keikaku, Dai-Ni-Ji Hojū Keikaku) otherwise known as the "Circle Two" Plan was the second of four expansion plans of the Imperial Japanese Navy between 1930 and the start of World War II.
Download QR code; Print/export Download as PDF; Printable version; ... was one of the armaments expansion plan of the Imperial Japanese Navy (IJN). ...
Download QR code; Print/export ... Imperial Japanese Navy ship classifications went through various changes between 1871 and 1945, as technology changed and new ship ...
The Japanese Monographs [2] are a series of operational histories, written by former officers of the Japanese army and navy, of Japanese actions in China during World War II. The 187 monographs were prepared under the direction of General Headquarters of the U.S. Far East Command beginning in 1945.
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