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Ultra - the code word for the greatest secret of World War II - was the
method by which the Allies intercepted German radio transmissions and broke
their coded contents. But how was this information transmitted to the
battlefield? Author Ronald Lewin was the first historian to utilise actual Ultra
intercepts to show how this information was used in combat. He is also the first
historian to have interviewed the men, both British and American, who produced
and used Ultra intercepts in the key positions of leadership throughout the war.
In documenting these incredible events, author Ronald Lewin tells the story of
Ultra from 1920 through 1945. He utilised more than 70,000 previously secret
Ultra intercepts. He has interviewed the Head of the Polish secret service who
provided the Allies with the first Ultra code-breaking equipment before World
War II started. He shows how the German radio signals were intercepted, how the
codes were broken, how the information was evaluated, how Allied reactions were
planned, and what impact this Ultra material had on the field of
  • AUTHOR: Bidwell/Graham
  • FORMAT: Pb
  • Code: 24015

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