The Zimmermann Telegram by Thomas Boghardt
Intelligence, Diplomacy, and America's Entry into World War I

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By the winter of 1916/17, World War I had reached a deadlock. While the Allies commanded greater resources and fielded more soldiers than the Central Powers, German armies had penetrated deep into Russia and France, and tenaciously held on to their conquered empire. Hoping to break the stalemate on the western front, the exhausted Allies sought to bring the neutral United States into the conflict.

A golden opportunity to force American intervention seemed at hand when British naval intelligence intercepted a secret telegram detailing a German alliance offer to Mexico. In it, Berlin’s foreign secretary, Arthur Zimmermann, offered his country’s support to Mexico for re-conquering “the lost territory in Texas, New Mexico, and Arizona” in exchange for a Mexican attack on the United States, should the latter enter the war on the side of the Allies. The British handed a copy of the Telegram to the American government, which in turn leaked it to the press. On March 1, 1917, the Telegram made headline news across the United States, and five weeks later, America entered World War I.

Based on an examination of virtually all available German, British, and U.S. government records, this book presents the definitive account of the Telegram and questions many traditional views on the origins, cryptanalysis, and impact of the German alliance scheme. While the Telegram has often been described as the final step in a carefully planned German strategy to gain a foothold in the western hemisphere, this book argues that the scheme was a spontaneous initiative by a minor German foreign office official, which gained traction only because of a lack of supervision and coordination at the top echelon of the German government. On the other hand, the book argues, American and British secret services had collaborated closely since 1915 to bring the United States into the war, and the Telegram’s interception and disclosure represented the crowning achievement of this clandestine Anglo-American intelligence alliance. Moreover, the book explicitly challenges the widely accepted notion that the Telegram’s publication in the U.S. press rallied Americans for war. Instead, it contends that the Telegram divided the public by poisoning the debate over intervention, and by failing to offer peace-minded Americans a convincing rationale for supporting the war. The book also examines the Telegram’s effect on the memory of World War I through the twentieth century and beyond.

About Thomas Boghardt

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Thomas Boghardt, formerly a historian at the International Spy Museum, he joined the U.S. Army Center of Military History in 2010. He lives with his family in Bethesda, MD.
Published October 15, 2012 by Naval Institute Press. 320 pages
Genres: History, War. Non-fiction

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On the morning of March 1, 1917, virtually every American newspaper published a bombshell story: a report on a telegram from the German foreign secretary, Arthur Zimmermann, proposing an alliance with Mexico. He offered his country's support to Mexico for reconquering "the lost territory in Texas...

Nov 20 2012 | Read Full Review of The Zimmermann Telegram: Inte...


A senior historian at the U.S. Army Center of Military History and an expert on the history of intelligence and cryptanalysis, Boghardt has marshaled an impressive array of German, British and American sources to support his arguments about the origins, interception and consequences of the telegram.

May 01 2013 | Read Full Review of The Zimmermann Telegram: Inte...

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