How the U.S. made war with the language of peace

Poor, poor Esperanto

American troops run for a helicopter after a successful attack behind enemy lines during a training session in 1962.
(Image credit: Hulton Archive/Getty Images)

In the 1950s and 60s, the U.S. Army conducted training exercises using an imaginary enemy named, quite simply, Aggressor. The characteristics of Aggressor were worked out in realistic detail. Soldiers assigned to play the part of Aggressor troops had to learn the organization of its ranks and the types of weapons it used. They wore special uniforms and insignia and even carried fully realized fake identity papers. They also had to speak a different language, and that language, in a twist so ironic it is almost cruel, was Esperanto, the language of peace.

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Arika Okrent

Arika Okrent is editor-at-large at TheWeek.com and a frequent contributor to Mental Floss. She is the author of In the Land of Invented Languages, a history of the attempt to build a better language. She holds a doctorate in linguistics and a first-level certification in Klingon. Follow her on Twitter.