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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.
A similar break into the most secure Japanese diplomatic cipher, designated Purple by the US Army Signals Intelligence Service, started before the US entered the war. Product from this source was called Magic. On the other side, German code breaking in World War II achieved some notable successes cracking British naval and other ciphers.
This article contains a list of air groups of Imperial Japanese Navy Air Service.Literal translation of 海軍航空隊 (Kaigun Kōkūtai) is "Naval Air Group", however, "Naval" is typically omitted in most of the established English-language sources (e.g., [1] [2] [3] [4]).
In 1923, a US Navy officer acquired a stolen copy of the Secret Operating Code codebook used by the Imperial Japanese Navy during World War I.Photographs of the codebook were given to the cryptanalysts at the Research Desk and the processed code was kept in red-colored folders (to indicate its Top Secret classification).
Imperial Japanese Navy ship classifications went through various changes between 1871 and 1945, as technology changed and new ship classes were added while those that became obsolete were discontinued.
Identification chart of Japanese aircraft Mitsubishi G3M aircraft of the Imperial Japanese Navy were nicknamed "Nell" by Allied forces during World War II.. The World War II Allied names for Japanese aircraft were reporting names, often described as codenames, given by Allied personnel to Imperial Japanese aircraft during the Pacific campaign of World War II.
At the beginning of the Pacific War, the strategy of the Imperial Japanese Navy was underpinned by several key assumptions.The most fundamental was that just as the Russo-Japanese War had been decided by a single naval battle at Tsushima (May 27–28, 1905), the war against the United States would also be decided by a single, decisive battle at sea, or Kantai Kessen. [14]