History -- History 17 Foreign relations -- 13 Politics and government -- 12 Biography -- 6 Terrorism -- 6 Communism -- 5 more ... African Americans -- 4 Colonies -- 4 Presidents -- 4 20th century 3 Armed Forces -- 3 Civilization 3 Description and travel 3 Diplomacy -- 3 Ethnic relations 3 Government policy -- 3 International relations -- 3 Islam and politics -- 3 Politics and government 3 Slavery -- 3 World politics -- 3 Autonomy and independence movements 2 Biography 2 China -- 2 Communism and intellectuals -- 2 Counterinsurgency -- 2 Economic conditions -- 2 Economic policy -- 2 Guerrilla warfare -- 2 less ...