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The Instructions for the Battlefield (Kyūjitai: 戰陣訓; Shinjitai: 戦陣訓, Senjinkun, Japanese pronunciation: [se̞nʑiŋkũ͍ɴ]) was a pocket-sized military code issued to soldiers in the Imperial Japanese forces on 8 January 1941 in the name of then-War Minister Hideki Tojo. [1] It was in use at the outbreak of the Pacific War.
Code Girls: The Untold Story of the American Women Code Breakers of World War II. New York, Boston: Hachette Books. ISBN 978-0-316-35253-6., Chapter 10. Smith, Michael (2000). The Emperor's Codes: Bletchley Park and the breaking of Japan's secret ciphers. London: Bantam Press. ISBN 0593-046412.
This is a list of known World War II era codenames for military operations and missions commonly associated with World War II. As of 2022 [update] this is not a comprehensive list, but most major operations that Axis and Allied combatants engaged in are included, and also operations that involved neutral nation states.
The vulnerability of Japanese naval codes and ciphers was crucial to the conduct of World War II, and had an important influence on foreign relations between Japan and the west in the years leading up to the war as well. Every Japanese code was eventually broken, and the intelligence gathered made possible such operations as the victorious ...
This is a list of convoy codes used by the Allies during World War II There were over 300 convoy routes organized, in all areas of the world; each was designated by a two- or three letter code. List of Allied convoys during World War II by region provides additional information.
Trench codes (a form of cryptography) were codes used for secrecy by field armies in World War I. [ 1 ] [ 2 ] Messages by field telephone, radio and carrier pigeons could be intercepted, hence the need for tactical World War I cryptography .
Late in the war the upper rear stabilizer was painted black with a longitudinal yellow band in the center except for the elevators. 49th Bomb Wing Upper half of the fin painted red, and a red symbol in the lower half; used the same scheme on the upper rear stabilizer with the red on the right side and the symbol on the left. 451st BG: circle ...
Herbert Yardley began as a code clerk in the State Department. After the outbreak of war he became the head of the cryptographic section of Military Intelligence Section [7] and was with the American Expeditionary Force in World War I as a Signals Corps cryptologic officer in France. He later headed the Cipher Bureau, a new cryptanalysis group ...