History -- World politics -- 9 Foreign relations -- 6 World War, 1939-1945 -- 6 Geopolitics -- 2 History 2 20th century 1 more ... 20th century -- 1 Aerial operations, American 1 Aircraft industry -- 1 Arms control -- 1 Arms race -- 1 Biography 1 Biography -- 1 Biotechnology 1 Civil War -- 1 Civilization, Modern -- 1 Defense industries -- 1 Democracy -- 1 Developing countries -- 1 Development banks -- 1 Diplomatic history 1 Economic assistance, American -- 1 Equipment and supplies -- 1 Historians -- 1 Histoy 1 Human rights 1 Industrial mobilization -- 1 Insurgency -- 1 Intellectuals -- 1 less ...