Document Title Government Code and Cypher School: Signals Intelligence Passed to the Prime Minister, Messages and Correspondence
Reference HW 1/3781
Conflicts Second World War
Themes Foreign Policy and International Relations
Regions East Asia, Europe, Middle East, North America, South Asia
Countries China, Germany, Great Britain, India, Japan, Mongolia, Persia, Russia, Soviet Union, United States of America
Document Type Signals Intelligence
Organisations Chiefs of Staff, Security Service, Government Code and Cypher School
People Edward Bridges, Franklin Delano Roosevelt


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: from the Japanese Minister for Foreign Affairs to the ambassador in Moscow, on a Japanese colonel's lecture on Soviet intentions, on May 23; and from the Chinese military attaché in Berne, on Soviet attitudes to Britain and the U.S., on May 24.


diplomatic intelligence, collaborators, Japanese-occupied territory, Sino-Japanese War, Soviet strategy, troop movements, Anglo-Soviet relations, American-Soviet relations, intelligence gathering, effects of bombing

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