World War, 1939-1945 1,753 Secret service 1,751 History 685 Guerre mondiale, 1939-1945 410 Service secret 404 Spies 292 Military intelligence 221 more ... Underground movements 201 Histoire 142 Intelligence service 112 Cryptography 110 Campaigns 108 Espionage 108 Intelligence officers 102 HISTORY 89 Espionage, German 81 War 72 Foreign relations 64 Espions 62 Weltkrieg 60 Women spies 55 Espionage, British 53 World War II 50 Military 49 Electronic intelligence 42 Mouvements de résistance 40 Politics and government 40 Spionage 40 Military campaigns 38 Anti-Nazi movement 37 less ...