She Broke Hitler's Spy Network Alone — Then He Erased Her Name From History

In March 1942, Elizebeth Smith Friedman was reading encrypted Nazi intelligence messages that Bletchley Park had concluded were unbreakable. She had spent six months doing it with twenty people and a pencil. Then J. Edgar Hoover called a press conference. He announced the FBI had smashed the Nazi spy ring in Brazil. His name. His bureau. Front page of every newspaper in the country. The Germans read the same papers. Within seventy-two hours every cipher she had spent six months breaking went dark simultaneously. She said nothing. She pulled out a fresh sheet of paper and started again. Elizebeth Smith Friedman ran the only federal codebreaking unit in American history commanded by a woman. She broke three separate variants of the Enigma machine by hand. She dismantled the Nazi intelligence network across Argentina, Brazil, Chile, and Mexico. She redirected the Queen Mary and saved 8,000 troops from a German submarine. She did it all while Bletchley Park did the same work with ten thousand people and machines the size of rooms. J. Edgar Hoover published it all under his own name. She had signed a secrecy oath. She kept it for the rest of her life. Her name was not known outside government until 2017. This is her story. SOURCES • The Woman Who Smashed Codes — Jason Fagone (2017) • NSA Declassified History: German Clandestine Activities in South America in World War II • US Senate Resolution 133, 116th Congress (2019) • George C. Marshall Foundation, Lexington Virginia — Friedman Collection • US National Archives — Unit 387 records • Operation Bolívar — NSA declassified records