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  2. Zimmermann telegram - Wikipedia

    en.wikipedia.org/wiki/Zimmermann_Telegram

    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.

  3. Charles J. Mendelsohn - Wikipedia

    en.wikipedia.org/wiki/Charles_J._Mendelsohn

    He was a professor of ancient languages in 1917. [3] ... He wrote several works for the Black Chamber, including The Zimmermann Telegram of January 16, 1917, ...

  4. World War I cryptography - Wikipedia

    en.wikipedia.org/wiki/World_War_I_cryptography

    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 ...

  5. Diplomatic cable - Wikipedia

    en.wikipedia.org/wiki/Diplomatic_cable

    A diplomatic cable, also known as a diplomatic telegram (DipTel [1] [2]) or embassy cable, is a confidential text-based message exchanged between a diplomatic mission, like an embassy or a consulate, and the foreign ministry of its parent country. [3] [4] [5] A diplomatic cable is a type of dispatch.

  6. Heinrich von Eckardt - Wikipedia

    en.wikipedia.org/wiki/Heinrich_von_Eckardt

    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.

  7. Unrestricted submarine warfare - Wikipedia

    en.wikipedia.org/wiki/Unrestricted_submarine_warfare

    Germany's resumption of unrestricted submarine warfare in February 1917, together with the Zimmermann Telegram, brought American entry into World War I on the British side. The Battle of the Atlantic during World War II.

  8. Germany–Mexico relations - Wikipedia

    en.wikipedia.org/wiki/Germany–Mexico_relations

    In January 1917, British agents intercepted a telegram sent to German Ambassador to Mexico Heinrich von Eckardt by Arthur Zimmermann, State Secretary for Foreign Affairs of the German Empire. In the telegram, Germany proposed to Mexico that if the United States were to join the war, Mexico should join and side with the Central Powers.

  9. Arthur Zimmermann - Wikipedia

    en.wikipedia.org/wiki/Arthur_Zimmermann

    Arthur Zimmermann (5 October 1864 – 6 June 1940) was State Secretary for Foreign Affairs of the German Empire from 22 November 1916 until his resignation on 6 August 1917. His name is associated with the Zimmermann Telegram during World War I .