Era
20th century
18
21st century
10
19th century
9
2000-2099
6
1800-1999
4
18th century
4
1989-
4
1899-1992
3
1900-1999
3
1918-1945
3
1918-1974
3
1935-1967
3
1936-1945
3
1960-
3
1976-2000
3
1979-1997
3
1997-
3
1884-1942
2
1897-1960
2
1898-1984
2
1901-1936
2
1910-1936
2
1917-1936
2
1953-1985
2
1991-
2
Civil War, 2011-
2
Revolution, 1917-1921
2
Since 1918
2
Since 1960
2
1583-1645
1
1712-1780
1
1723-1790
1
1754-1825
1
1770-1831
1
1806-1873
1
1813-1873
1
1818-1883
1
1830-1905
1
1835-1902
1
1840-1916
1
1858-1943
1
1859-1947
1
1871-
1
1872-1943
1
1881-1947
1
1881-1969
1
1887-1962
1
1889-1940
1
1893-1973
1
1900 - 1999
1
more ...