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The Zimmermann telegram (or Zimmermann note or Zimmermann cable) was a secret diplomatic communication issued from the German Foreign Office on January 17, 1917, that proposed a military contract between the German Empire and Mexico if the United States entered World War I against Germany.
The decoding by British Naval intelligence of the Zimmermann telegram helped bring the United States into the war. Trench codes were used by field armies of most of the combatants (Americans, British, French, German) in World War I. [1] The most commonly used codes were simple substitution ciphers. More important messages generally used ...
Rev. William Montgomery (1871–1930) was a Presbyterian minister and a British codebreaker who worked in Room 40 during World War I.. Montgomery and Nigel de Grey deciphered the Zimmermann Telegram, which helped bring the U.S. into World War I.
Zimmermann Telegram: Solved within days of transmission 1918 Chaocipher: Solved 1918–1945 Enigma machine messages Solved (broken by Polish and Allied cryptographers between 1932 and 1945) 1939 D'Agapeyeff cipher: Unsolved 1939–1945 Purple cipher machine messages Solved (broken by Allied cryptographers in 1940) 1941 Lorenz SZ42 machine ...
Eckardt is known for being the recipient of the Zimmermann Telegram, a telegram sent by German Foreign Secretary Arthur Zimmermann on January 16, 1917. The message was first sent to the German ambassador to the United States, Johann von Bernstorff, to deter interception, and he relayed it to Eckardt on January 19.
Zimmermann Telegram – The U.S. government released the English text of the telegram outlining German plans to start a war between Mexico and the United States to the public. [100] French minelayer Cassini struck a mine and sank in the Strait of Bonifacio with the loss of 88 of her crew. [101] [102]
The Zimmermann Telegram (as it was sent from Washington to Mexico) encrypted as ciphertext. KGB ciphertext found in a hollow nickel in Brooklyn in 1953. In cryptography, ciphertext or cyphertext is the result of encryption performed on plaintext using an algorithm, called a cipher. [1]
On 1 March, the United States Government passed the text of the telegram to the press. At first, some sectors of the US papers, especially those of the Hearst press empire, questioned whether the telegram was a forgery made by British intelligence in an attempt to persuade the US government to enter the war on Britain's side. This opinion was ...