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X-WR-CALDESC:On 25 & 26 July 1939\, one of the most important events in the
  history of intelligence took place in the woods outside Warsaw. Just thre
 e weeks before the Government Code and Cypher School (GC&CS) moved to its 
 War Station at Bletchley Park\, its Head\, Alastair Denniston\, and its Ch
 ief Cryptanalyst\, Dilly Knox\, traveled to Warsaw to meet their Polish an
 d French equivalents. During this meeting\, Poland shared its successes ag
 ainst the ENIGMA with Britain and France. Poland’s main codebreakers were 
 Jerzy Rozycki\, Henryk Zygalski\, and Marian Rejewski who joined the Polis
 h General Staff's Cipher Bureau in Warsaw. (Image is of Denniston's travel
  documents - via the Bletchley Park Web site.)\n\nThe first breakthroughs 
 in regard to solving the Enigma did not occur at Bletchley Park\, but rath
 er had already occurred in Poland. German military messages enciphered on 
 the Enigma were first broken by the Polish Cipher Bureau\, beginning in De
 cember 1932. Three Polish mathematicians pioneered the solutions - Jerzy R
 ozycki\, Henryk Zygalski and Marian Rejewski. The Poles had understood tha
 t it was necessary to use mathematics to look for patterns\, and they had 
 then taken a further step by building electro-mechanical machines to searc
 h for solutions\, known as 'bombas.'\n\nThe GCHQ Departmental Historian sa
 id\, “To the surprise of the British\, the Poles\, who had treated Enigma 
 as a mathematical problem from the outset\, were much further forward than
  they were both in terms of successful cryptanalysis and of building machi
 nery to support cryptanalysis. The Poles were generous and shared everythi
 ng they had with their allies.”\n\nVisit the link below to learn more abou
 t the Meeting of Pyry and the 75th anniversary in 2014.\n\nAlso read the a
 rticle\, 'Poland's Overlooked Enigma Codebreakers\,' by Gordon Corera for 
 BBC News and 'Polish Codebreakers 'cracked Enigma before Alan Turing'' in 
 the Telegraph - links below. \n\nAnd read\, 'The Hacker Who Saved Thirty M
 illion Lives\,' by Wojciech Oleksiak - about Polish mathematician Marian R
 ejewski via the link below.\n
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TZID:America/New_York
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TZNAME:EST
DTSTART:20251102T020000
TZOFFSETFROM:-0400
TZOFFSETTO:-0500
RDATE:20261101T020000
RDATE:20271107T020000
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DTSTART:20260308T020000
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TZOFFSETTO:-0400
RDATE:20270314T020000
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BEGIN:VEVENT
UID:6c09a483-b230-4422-b2a9-dab5236d609a
DTSTAMP:20260424T093835Z
DESCRIPTION:On 25 & 26 July 1939\, one of the most important events in the 
 history of intelligence took place in the woods outside Warsaw. Just three
  weeks before the Government Code and Cypher School (GC&CS) moved to its W
 ar Station at Bletchley Park\, its Head\, Alastair Denniston\, and its Chi
 ef Cryptanalyst\, Dilly Knox\, traveled to Warsaw to meet their Polish and
  French equivalents. During this meeting\, Poland shared its successes aga
 inst the ENIGMA with Britain and France. Poland’s main codebreakers were J
 erzy Rozycki\, Henryk Zygalski\, and Marian Rejewski who joined the Polish
  General Staff's Cipher Bureau in Warsaw. (Image is of Denniston's travel 
 documents - via the Bletchley Park Web site.)\n\nThe first breakthroughs i
 n regard to solving the Enigma did not occur at Bletchley Park\, but rathe
 r had already occurred in Poland. German military messages enciphered on t
 he Enigma were first broken by the Polish Cipher Bureau\, beginning in Dec
 ember 1932. Three Polish mathematicians pioneered the solutions - Jerzy Ro
 zycki\, Henryk Zygalski and Marian Rejewski. The Poles had understood that
  it was necessary to use mathematics to look for patterns\, and they had t
 hen taken a further step by building electro-mechanical machines to search
  for solutions\, known as 'bombas.'\n\nThe GCHQ Departmental Historian sai
 d\, “To the surprise of the British\, the Poles\, who had treated Enigma a
 s a mathematical problem from the outset\, were much further forward than 
 they were both in terms of successful cryptanalysis and of building machin
 ery to support cryptanalysis. The Poles were generous and shared everythin
 g they had with their allies.”\n\nVisit the link below to learn more about
  the Meeting of Pyry and the 75th anniversary in 2014.\n\nAlso read the ar
 ticle\, 'Poland's Overlooked Enigma Codebreakers\,' by Gordon Corera for B
 BC News and 'Polish Codebreakers 'cracked Enigma before Alan Turing'' in t
 he Telegraph - links below. \n\nAnd read\, 'The Hacker Who Saved Thirty Mi
 llion Lives\,' by Wojciech Oleksiak - about Polish mathematician Marian Re
 jewski via the link below.\n
DTSTART;TZID=America/New_York:20260725T060000
DTEND;TZID=America/New_York:20260725T060001
LOCATION:
SUMMARY:1939: Meeting of Pyry took place.....
END:VEVENT
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