Era
19th century
62
20th century
39
Civil War, 1861-1865
19
1800-1899
15
1900-1999
12
1837-1901
6
18th century
6
Revolution, 1775-1783
6
Colonial period, ca. 1600-1775
5
1800-1999
4
1865-1898
4
1865-1950
4
1898-1951
4
Famine, 1845-1852
4
1783-1865
3
1861-1865
3
1873-1944
3
1909-1992
3
1945-1989
3
1951-
3
1968-1998
3
1600-1865
2
1700-1820
2
1760-1820
2
1775-1847
2
1783-1809
2
1800 - 1899
2
1803-1865
2
1819-1892
2
1823-1867
2
1835-1877
2
1839-1897
2
1844-1890
2
1874-1958
2
1888-1953
2
1888-1969
2
1901-1953
2
1910-1921
2
1913-1978
2
1917-1963
2
1928
2
1939-
2
1939-1945
2
Revolution, 1835-1836
2
Since 1945
2
To 1846
2
To 1901
2
1600-1775
1
1649-1775
1
1700-1799
1
more ...