The Espionage Act is a United States federal law enacted in 1917 that prohibits interference with military operations or support for U.S. enemies during wartime. It was designed to prevent espionage and protect national security by making it illegal to communicate information that could harm the U.S. or aid its adversaries. This law played a significant role in wartime restrictions on civil liberties, as it allowed for the suppression of dissent and limited free speech under the guise of protecting national security.
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