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.

May 21, 2014 · The British cryptographic office known as “Room 40” decoded the Zimmermann Telegram and handed it over to the United States in late-February 1917. By March 1, its scandalous contents were...

Jan 4, 2025 · Zimmermann Telegram, coded telegram sent January 16, 1917, by German foreign secretary Arthur Zimmermann to the German minister in Mexico. The note revealed a plan to renew unrestricted submarine warfare and to form an alliance with Mexico and Japan if the United States declared war on Germany.

Aug 22, 2022 · In January of 1917, British cryptographers deciphered a telegram from German Foreign Minister Arthur Zimmermann to the German Minister to Mexico, von Eckhardt, offering United States territory to Mexico in return for joining the German cause.

Jun 2, 2021 · In January 1917, British cryptographers deciphered a telegram from German Foreign Minister Arthur Zimmermann to the German Minister to Mexico, Heinrich von Eckhardt, offering United States territory to Mexico in return for joining the German cause.

The telegram was considered perhaps Britain’s greatest intelligence coup of World War I and, coupled with American outrage over Germany’s resumption of unrestricted submarine warfare, was the tipping point persuading the U.S. to join the war.

In January 1917, German foreign secretary Arthur Zimmermann dispatched a secret letter to Heinrich von Eckardt, the German minister to Mexico. The note informed Eckardt that if the United States...

On Jan­uary 17, 1917 British signals intelligence intercepted and decrypted a coded German telegram from German Foreign Secretary Arthur Zimmermann that was intended for Germany’s ambassador to Mexico.

Jul 7, 2023 · A lesson plan about the Zimmermann telegram is online at www.archives.gov/education/lessons/zimmermann/. The telegram is also included in a list of 100 milestone documents: http://ourdocuments.gov/.

Hoping to divert America’s attention away from Europe, the German foreign minister, Arthur Zimmermann (1864–1940), proposed a Mexican-Japanese-German alliance to fight the United States.