Era
20th century
33
1939-1945
17
1945-
15
Since 1945
11
1900-1999
8
1933-1945
7
1945-1979
7
20e siècle
7
To 1500
7
18th century
6
1945-1989
6
1973-1993
6
1967-1973
5
Revolution, 1917-1921
5
1868-
4
18e siècle
4
1917-1921 (Révolution)
4
1952-
4
1961-1975
4
1975-1985
4
1989
4
1644-1912
3
1700-1799
3
1868-1912
3
1906-1975
3
1912-1949
3
1917-1921
3
1985
3
1991-
3
19th century
3
Period of civil wars, 1480-1603
3
To 146 B.C.
3
1467-1603 (Époque des guerres civiles)
2
1517-1882
2
16e siècle
2
16th century
2
1789-1900
2
1798-
2
17th century
2
1801-1917
2
1882-1945
2
1912-1928
2
1912-1945
2
1917-1936
2
1917-1991, Soviet Union
2
1945-1960
2
1945-1991
2
1953-1985
2
1958
2
1960-
2
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