Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/505
Conflicts Second World War
Themes Military Intelligence and Operations
Regions East Asia, Europe, North America
Countries China, England, Germany, Great Britain, Russia, United States of America
Document Type Signals Intelligence
Organisations Government Code and Cypher School
People George Marshall


A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following correspondence: a coversheet to Commander Denniston; to the Prime Minister (PM) from General Marshall of the U.S. Army, on the Japanese favouring an attack on the Soviet Union as the opportunity presents itself.


Japanese strategy

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