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What’s the context? Polish cryptologists reveal they have cracked the Enigma code, 26 July 1939

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The three Polish codebreakers Marian Rejewski, Jerzy Rozycki and Henryk Zygalski

The 3 Polish codebreakers Marian Rejewski, Jerzy Rozycki and Henryk Zygalski ‘Il y a du nouveau’ On 26 July 1939, in the Pyry Forest south of Warsaw, Polish cryptologists revealed...

What’s the Context? 20 December 1917: formation of the Cheka, the first Soviet security and intelligence agency

...sword to smite its enemies. Spreading the Revolution Initially focussed on internal opposition, the Cheka began very soon to send agents abroad to gather intelligence and promote revolution by covert...