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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 ...
Zimmermann telegram as decoded by Room 40 All British ships were under instructions to use radio as sparingly as possible and to use the lowest practical transmission power. Room 40 had benefited greatly from the free chatter between German ships, which gave them many routine messages to compare and analyse, and from the German habit of ...
Admiral Sir William Reginald Hall KCMG CB (28 June 1870 – 22 October 1943), known as Blinker Hall, was the British Director of Naval Intelligence (DNI) from 1914 to 1919. . Together with Sir Alfred Ewing he was responsible for the establishment of the Royal Navy's codebreaking operation, Room 40, which decoded the Zimmermann telegram, a major factor in the entry of the United States into ...
However, the telegram was intercepted by the British on its way from Bernstorff to Eckardt and was decoded by Room 40. In the telegram, Zimmermann instructed Eckardt to approach President Venustiano Carranza with a proposition in two parts: firstly, to form an alliance with Germany, and secondly, should Germany drop its neutrality against the ...
Zimmermann telegram as decoded by Room 40 in 1917. Room 40 played an important role in several naval engagements during the war, notably in detecting major German sorties into the North Sea. The battle of Dogger Bank was won in no small part due to the intercepts that allowed the Navy to position its ships in the right place. "Warned of a new ...
Germany sent a telegram in code outlining a plan to aid Mexico in such a conflict and Mexico's reward would be to regain land lost to the U.S. in the Mexican American War (1846–48). The Zimmermann Telegram was intercepted and decoded by the British and given to Wilson, who then made public. Carranza, whose faction had benefited from U.S ...
Alfred Dillwyn "Dilly" Knox, CMG (23 July 1884 – 27 February 1943) was an English classics scholar and papyrologist at King's College, Cambridge and a codebreaker.As a member of the Room 40 codebreaking unit he helped decrypt the Zimmermann Telegram which brought the USA into the First World War. [1]