Secret service World War, 1939-1945 45 History 28 Spies 13 Intelligence service 11 Biography 9 Military intelligence 8 Campaigns 4 Cryptography 4 Espionage 4 Politics and government 4 Underground movements 4 Cold War 3 Foreign relations 3 Espionage, Germany 2 Espionage, Japanese 2 Germany 2 Great Britain 2 Japanese 2 Malaya 2 Personal narratives, American 2 Personal narratives, British 2 Police 2 Relations 2 United States 2 World War 2 World war, 1939-1945 2 Afghan War, 2001- 1 Anecdotes 1 Campaigns, 1