The American 6813th Technical History October 1945 reformatted by Tony Sale (C) OctoberTOP SECRET U Note in pencil: T/Spages page 1 SSD (sig. Sect.), UK Base APO 413, US Army

Source URL: www.codesandciphers.org.uk

• Bletchley Park
• Hut 6
• Ultra
• Signal Corps
• Enigma machine
• Neil Leslie Webster
• Cryptography
• Buckinghamshire
• Espionage