Foreign relations -- 3 History -- 2 Relations -- 2 Biological warfare -- 1 Causes 1 Civilization -- 1 Foreign economic relations 1 more ... Foreign economic relations -- 1 History 1 Military relations -- 1 Politics and government -- 1 Sino-Japanese Conflict, 1937-1945 -- 1 World War, 1939-1945 -- 1 less ...