Work on breaking the Enigma code had started long before the war, and cryptographers from all over Europe including Poland, had done the ground work. Turing's work on Enigma was greatly helped in May 1941 by the lucky capture of an Enigma machine from a German U-boat, which pushed the project forward by several years. <ref> http://ww2today.com/9th-may-1941-enigma-machine-captured</ref> | Work on breaking the Enigma code had started long before the war, and cryptographers from all over Europe including Poland, had done the ground work. Turing's work on Enigma was greatly helped in May 1941 by the lucky capture of an Enigma machine from a German U-boat, which pushed the project forward by several years. <ref> http://ww2today.com/9th-may-1941-enigma-machine-captured</ref> |