World War, 1939-1945 Foreign relations 90 History 81 Diplomatic history 78 Guerre mondiale, 1939-1945 24 Campaigns 20 Military relations 20 more ... Secret service 18 Diplomatic relations 15 Relations extérieures 14 Histoire diplomatique 13 Military intelligence 12 Aerial operations, British 10 Weltkrieg 9 Cryptography 8 Generals 8 Politics and government 8 Außenpolitik 7 Equipment and supplies 7 World War, 1914-1918 7 Aerial operations, American 6 Literature and the war 6 Prime ministers 6 Prisoners of war 6 Relations 6 Strategy 6 Alliances 5 Armed Forces 5 Command of troops 5 Economic conditions 5 less ...