Places
- Soviet Union -- Politics and government2
- Soviet Union -- Social conditions -- 1917-19452
- Soviet Union -- Social life and customs2
- Ukraine -- History -- 1917-2
- Afghanistan -- History -- 20th century1
- Albania -- History -- 1912-19441
- Balkan Peninsula1
- Bessarabia (Moldavian S.S.R. and Ukraine) -- History1
- Bessarabia -- History1
- Bulgaria -- History -- September uprising, 19231
- China -- Economic conditions -- 20th century1
- China -- Foreign relations -- Great Britain1
- China -- Foreign relations -- Japan1
- China -- Foreign relations -- Soviet Union1
- China -- Foreign relations -- United States1
- China -- History -- Civil War, 1945-19491
- China -- History -- Revolution, 1911-19121
- China -- History -- Revolution, 19131
- China -- History -- Revolution, 1915-19161
- China -- History -- Warlord period, 1916-19281