Era
20th century
104
1900-1999
48
19th century
35
1910-1946
25
21st century
25
1800-1899
18
1821-1861
17
1810-
13
2000-2099
13
1970-1973
10
Since 1900
10
18th century
9
1931-1939
9
1974-
9
Revolution, 1910-1920
9
1939-1975
8
1955-1983
7
1970-1988
7
1980-
7
1973-1988
6
Coup d'état, 1973
6
1540-1810
5
1946-1970
5
1946-1974
5
1959-1990
5
Civil War, 1936-1939
5
Republic, 1931-1939
5
Revolution, 1959
5
16th century
4
1819-1831
4
1867-1910
4
1908-1973
4
1943-1955
4
2000-
4
Wars of Independence, 1806-1830
4
1516-1700
3
1792-1840
3
1806-1830
3
1822-1832
3
1886-1931
3
1892-1975
3
1900 - 1999
3
1917-
3
1973-
3
1988-
3
1988-2000
3
1990-
3
1999-
3
Since 1810
3
To 1810
3
more ...