History 22 Military intelligence World War, 1939-1945 10 Secret service 7 Cold War 6 Intelligence service 6 Intelligence officers 3 more ... American 2 Anthropologists 2 Anthropology 2 Armed Forces 2 Campaigns 2 Causes 2 Electronic surveillance 2 Espionage 2 Espionage, American 2 Espionage, British 2 Espionage, German 2 Histoire 2 Military campaigns 2 Political aspects 2 Prisoners of war 2 Science and state 2 Spies 2 War 2 1900 - 1999 1 Aerial operations, American 1 Aerial operations, British 1 Aerial reconnaissance 1 Attitudes 1 less ...