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Counterintelligence: John Semer Farnsworth

Counterintelligence can be described as activities designed to prevent or thwart spying, intelligence gathering, and sabotage by an enemy or other foreign entity. This guide provides books, articles, reports, websites, and videos on the subject.

John Semer Farsnworth, USN

John Semer Farnsworth was a former United States Navy officer who was convicted of spying for Japan during the 1930s.  Arrested on July 14 1936, he was charged with selling confidential information to the Japanese.  Farnsworth was sentenced to 4-12 years in prison.

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