History -- 51 Foreign relations -- 50 History 24 Americans -- 21 Economic assistance, American -- 21 Politics and government -- 20 Fiction 18 more ... National characteristics, American 18 Biography 17 Biography -- 16 Personal narratives, American 16 Afro-Americans -- 15 Military assistance, American -- 14 Politics and government 13 Fiction -- 12 American literature 11 American wit and humor, Pictorial 11 Race relations 11 Foreign economic relations -- 10 Public opinion -- 10 World War, 1939-1945 -- 10 Relations -- 9 Foreign public opinion, American 8 Military policy 8 Anti-Americanism 7 Military relations -- 7 Vietnamese Conflict, 1961-1975 -- 7 Aerial operations, American 6 Civil rights -- 6 Investments, American -- 6 less ...