https://www.live-feeds.com/feed/napoleon-s-217-year-old-mysterious-letter-cracked-using-ai-in-6-hoursContinuously updated, source-cited coverage. https://www.live-feeds.com/feed/napoleon-s-217-year-old-mysterious-letter-cracked-using-ai-in-6-hourshttps://www.live-feeds.com/feed/napoleon-s-217-year-old-mysterious-letter-cracked-using-ai-in-6-hours#u99886Sun, 04 Oct 2026 19:45:38 +0000An AI researcher from SentinelOne used GPT-6 Astra to decode a 217-year-old coded military message from the Napoleonic era in six hours. The letter was originally sent in March 1809 by Eugene, the Viceroy of Italy and stepson of Napoleon Bonaparte, to French general Auguste de Marmont during France's conflict with Austria. The message had remained mysterious for over two centuries because the original cipher key was lost.Why it mattersThe ability to crack historical ciphers using modern AI demonstrates the speed of current linguistic processing compared to traditional cryptanalysis. This