The Zimmermann Telegram

Intelligence, Diplomacy, and America's Entry into World War I

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Briefing

In January 1917, British naval intelligence intercepted what became the most important telegram in all of American history. It was a daring proposition from Germany's foreign secretary, Arthur Zimmermann, offering German support to Mexico for regaining Texas, New Mexico, and Arizona in exchange for a Mexican attack on America. Five weeks later, America entered World War I.  Former SPY historian Thomas Boghardt returns to talk about his remarkable new account of the Zimmerman Telegram. He has tapped fresh sources to provide the definitive account of the origins and impact of this German scheme. Boghardt also corrects longstanding misunderstandings about how the telegram was sent and enciphered and provides a new account of how British intelligence was able to decipher it. 

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