Secret service World War, 1939-1945 1,790 History 699 Guerre mondiale, 1939-1945 413 Service secret 407 Spies 300 Military intelligence 223 more ... Underground movements 202 Histoire 144 Intelligence service 116 Cryptography 110 Espionage 109 Campaigns 108 Intelligence officers 101 HISTORY 89 Espionage, German 81 War 74 Foreign relations 65 Espions 64 Weltkrieg 60 Women spies 55 Espionage, British 53 World War II 50 Military 49 Politics and government 43 Electronic intelligence 42 Mouvements de résistance 42 Spionage 40 Anti-Nazi movement 38 Military campaigns 38 less ...