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Are you near Pyry in the Kabaty Woods? ...where the secrets of the Enigma code were disclosed to the Allies?
During a period of over six and a half years, from late December 1932 to the outbreak of World War II, three Polish mathematician-cryptologists (Marian Rejewski, Henryk Zygalski and Jerzy Różycki) at the Polish General Staff's Cipher Bureau in Warsaw had developed a number of techniques and devices – including the "grill" method, Różycki's "clock", Rejewski's "cyclometer" and "card catalog", Zygalski's "perforated sheets", and Rejewski's "cryptologic bomb" (Polish term: bomba, precursor to the later British "Bombe", named after its Polish predecessor) – to facilitate decryption of messages produced on the German "Enigma" cipher machine. A few weeks before the outbreak of World War II, on July 25, 1939, near Pyry in the Kabaty Woods just south of Warsaw, Poland disclosed her achievements to France and the United Kingdom, which had, up to that time, failed in all their own efforts to crack the German military Enigma cipher.
Had Poland not shared her Enigma-decryption results at Pyry, the United Kingdom would have been delayed at the least a year or two in its reading of the Enigma cyphers or might even have been unable to read them at all. In the event, intelligence gained from this source, codenamed ULTRA, was extremely valuable in the Allied prosecution of the war, though the exact influence of ULTRA on its course remains a subject of debate. Some have argued that ULTRA decided the very outcome of the war, though a view has also found broad acceptance that ULTRA hastened Germany's defeat by between 6 months and 4 years.
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