Foreign relations -- 22 History -- 16 Politics and government -- 11 National characteristics, American 10 American literature 9 Biography 9 History 6 more ... Military assistance, American -- 6 Biography -- 5 Economic assistance, American -- 5 Foreign economic relations -- 5 Philosophy 5 World War, 1939-1945 -- 4 Aerial operations, American 3 Americans -- 3 Case studies 3 Foreign public opinion, American 3 Legislators -- 3 Military policy 3 Military relations -- 3 Politics and government 3 Public opinion -- 3 African American legislators 2 Afro-Americans -- 2 American wit and humor, Pictorial 2 Anti-Americanism -- 2 Authors, American -- 2 Civil War -- 2 Civilization 2 Civilization -- 2 less ...