Chunks MicrolearningThe Zimmermann Telegram
How a single secret message drew America into World War I.
A War Stalemated
Frequently Asked Questions
What was the Zimmermann Telegram and why was it significant?
The Zimmermann Telegram was a secret diplomatic message sent by German Foreign Minister Arthur Zimmermann to Mexico in January 1917. The telegram proposed a military alliance between Germany and Mexico if the United States entered World War I. Its interception and publication by British intelligence helped push America into the war.
How did British codebreakers intercept and decode the Zimmermann Telegram?
British intelligence intercepted the encrypted telegram when it was transmitted through British-controlled transatlantic cables. The codebreakers in Room 40 of the British Admiralty were able to decrypt the message because they had previously captured German diplomatic codebooks. They then shared the decoded message with American officials to influence U.S. entry into the war.
What did Germany promise Mexico in the Zimmermann Telegram?
Germany promised Mexico financial support and the return of territories lost in the Mexican-American War, specifically Texas, New Mexico, and Arizona. In exchange, Mexico would enter the war as Germany's ally and attack the United States. Germany also suggested that Mexico should try to persuade Japan to join this alliance against America.
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