Places
- Russia -- History -- 20th century2
- Russia -- History -- February Revolution, 19172
- Soviet Union -- Foreign relations -- United States -- 1917-2
- Soviet Union -- History -- 1894-19172
- Soviet Union -- History -- 1918-19362
- Soviet Union -- Politics and government -- 1917-19362
- Soviet Union -- Social life and customs -- 1917-19702
- Spain -- History -- Civil War, 1936-19392
- Ukraine -- History -- 1917-2
- Ukraine -- History -- 1917-19212
- Ukraine -- History -- Revolution, 1917-19212
- United States -- Emigration and immigration2
- Albania -- History -- 1912-19441
- Armenia -- History -- 1901-1
- Balkan Peninsula1
- Baltic States1
- Bessarabia (Moldavian S.S.R. and Ukraine) -- History1
- Bessarabia -- History1
- Caucasus1
- Crimea (Ukraine) -- History1