On 26 and 27 July 1939, in Pyry near Warsaw, Polish intelligence initiated French and British military intelligence representatives into their Enigma-decryption techniques and equipment, including Zygalski sheets and the cryptologic bomb, and promised each delegation a Polish-reconstructed Enigma. The demonstration represented a vital basis for the later British continuation and effort. During the war, British cryptologists decrypted a vast number of messages enciphered on Enigma. The intelligence gleaned from this source, codenamed "Ultra" by the British, was a substantial aid to the Allied war effort.
Enigma machine in "News From the Front"Edit
On April 25, 1942, the New York Times reported on British and other Allied efforts to decode captured German Engima machines. No American administration official would speak on the record, or even admit on the record that code-breaking activities were taking place. The Times asked why better use had not been made of captured information, and opined that if the Allies were reading the enemies' codes, they had little to show for it.