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Napoleonic Wars
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- 1Historian cracks Napoleonic coded war letter unread for 217 years●Breaking the Cipher of the Napoleonic war briefing, unread for 217 years
A Napoleonic-era coded military briefing, addressed to General Auguste de Marmont and left unread for over two centuries, has finally been deciphered. The writeup walks through the codebreaking process behind the 217-year-old letter, drawing interest from history buffs and cryptography fans who are discussing the wartime intelligence methods it reveals.