Era
20th century
59
1900-1999
35
1964-1985
9
21st century
8
1945-1989
6
1917-1936
4
1988-
4
1989-
4
1991-
4
2000-
4
Since 1900
4
Since 1989
4
1892-1975
3
1918-1945
3
1945-
3
1954-
3
1973-1988
3
1981-2011
3
Revolution, 1964
3
Since 1991
3
1469-1527
2
1769-1821
2
1878-1953
2
1897-1974
2
1900-2002
2
1908-1935
2
1912-1994
2
1917-1989
2
1919-1968
2
1933-1974
2
1935-1958
2
1936-1953
2
1946-1973
2
1955-1983
2
1962-1988
2
1965-
2
1966-1998
2
1973-1986
2
1983-2002
2
Civil War, 2011-
2
Coup d'état, 1976
2
Dirty War, 1976-1983
2
Revolution, 1917-1921
2
Revolution, 1918-1919
2
Since 1981
2
1689-1801
1
1689-1917
1
1783-1865
1
1789-1815
1
1794-1876
1
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