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The Ultra Secret by Frederick Winterbotham: The Book That Rewrote World War II History

"The "Ultra Secret" refers to the high-level signals intelligence obtained by Allied codebreakers at Bletchley Park during World War II, specifically through the decryption of Germany’s Enigma and Lorenz ciphers. Frederick Winterbotham’s 1974 book, The Ultra Secret, was the first public disclosure of this operation, revealing that Allied commanders possessed nearly real-time access to the enemy’s most sensitive military communications throughout the conflict. The Silence of Thirty Years: The Context of the Disclosure For nearly three decades after the conclusion of World War II in 1945, the story of how the war was truly won remained one of th..."

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