Spies History 39 Secret service 24 Espionage, Soviet 20 World War, 1939-1945 13 Espionage 11 World War, 1914-1918 7 more ... Communism 5 Officials and employees 5 Politics and government 5 Cold War 4 Foreign relations 4 Gay men 4 Intelligence service 4 International relations 4 Art historians 3 Man-woman relationships 3 Military intelligence 3 Subversive activities 3 Anti-communist movements 2 Communists 2 Cryptography 2 Espionage, American 2 Espionage, British 2 Female impersonators 2 Foreign correspondents 2 Germans 2 Manners and customs 2 Moto, Mr. (Fictitious character) 2 Nazis 2 less ...