Era
1917-
1945-1992
5
1939-1945
3
20th century
3
1914-
2
1945-
2
Since 1900
2
Since 1917
2
1892-
1
1892-1979
1
1900-1999
1
1902-
1
1907-1939
1
1912-
1
1912-2002
1
1913-2007
1
1917-1921
1
1917-1936
1
1917-1945
1
1917-1989
1
1917-2011
1
1918-
1
1918-1938
1
1922?-1996
1
1925-1953
1
1928?
1
1928?-
1
1944-1991
1
1944-1992
1
1955-1965
1
1975-1985
1
1982-
1
Intervention, 1968
1
Revolution, 1917-1921
1
b. 1928?
1