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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.
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.
The Sussex pledge was, therefore, rescinded in January 1917, which started the decisive stage of the so-called First Battle of the Atlantic. The resumption of unrestricted submarine warfare and the Zimmermann Telegram caused the United States to declare war on Germany on April 6, 1917.
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 ...
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.
This opinion was reinforced by German and Mexican diplomats, as well as pro-German and pacifist opinion-formers in the United States. However, on 29 March 1917, Zimmermann gave a speech to the Reichstag confirming the text of the telegram and so put an end to all speculation as to its authenticity.
On this day in 1911 the first telegram was sent around the world via a commercial service from the New York Times' office to test how fast a message could travel through a dedicated cable.
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.