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Arthur Zimmermann. The message came in the form of a coded telegram dispatched by Arthur Zimmermann, the Staatssekretär (a top-level civil servant, second only to their respective minister) in the Foreign Office of the German Empire on January 17, 1917. The message was sent to the German ambassador to Mexico, Heinrich von Eckardt. [4]
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 ...
World War I cryptography. With the rise of easily-intercepted wireless telegraphy, codes and ciphers were used extensively in World War I. 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 ...
t. e. The Plan of San Diego (Spanish: Plan de San Diego) was a plan drafted in San Diego, Texas, in 1915 by a group of unidentified Mexican and Tejano rebels who hoped to seize Arizona, New Mexico, California, and Texas from the United States. The plan was never attempted.
The Zimmerman Telegram was a secretive diplomatic plan and communication for Mexico and Japan to join the Central powers that would let Mexico gain all of the Southwest territories that Mexico had lost during the Mexican-American war of 1846-1848. The message would be intercepted by the British and would be shown to the United States.
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 ...
Arthur Zimmermann, the German foreign minister, sent the Zimmermann Telegram to Mexico on January 16, 1917. Zimmermann invited Mexico (knowing their resentment towards America since the 1848 Mexican Cession) to join in a war against the United States if the United States declared war on Germany. Germany promised to pay for Mexico's costs and to ...
British intelligence intercepted the telegram and passed the information on to Washington. Wilson released the Zimmerman note to the public and Americans saw it as a casus belli—a justification for war. President Wilson before Congress, announcing the break in official relations with the German Empire on February 3, 1917.