History -- 41 History 19 Politics and government -- 7 Tiananmen Square Incident -- 7 Politics and government 6 Biography -- 4 Ch'ing dynasty -- 3 more ... China -- 3 Cultural Revolution -- 3 Biography 2 China 2 Civil War -- 2 Civilization 2 Communism -- 2 Democracy -- 2 Discoveries in geography -- 2 Explorers -- 2 Foreign relations -- 2 Heads of state -- 2 Ming dynasty, 1368-1644 2 history -- 2 20th century 1 Aerial operations, American 1 Aliens -- 1 Biological warfare -- 1 Ch'ing dynasty, 1644-1912 1 China report -- 1 Civil rights -- 1 Commerce -- 1 Cultural Revolution, 1966-1976 -- 1 less ...