Historical Period
20th century
291
19th century
135
1975-
65
21st century
49
To 1964
37
Civil War, 1861-1865
27
1868-1963
16
18th century
14
1800-1899
9
1964-1975
9
1877-1964
8
1865-1918
7
1900-1999
7
1960-1980
7
1861-1865
6
1865-
6
1865-1945
6
1865-1950
6
1945-
6
1980-
6
1894-1962
5
1929
5
1951-
5
1963-1969
5
1863-1877
4
1944-
4
1980-2020
4
1989-
4
To 1863
4
1775-1865
3
1809-1865
3
1838-1899
3
1865-1933
3
1893-1970
3
1898-1951
3
1920-1980
3
1935-
3
1993-
3
2000-2099
3
2009-2017
3
To 1865
3
1813-1885
2
1821-1865
2
1823-1891
2
1834-1915
2
1836-1932
2
1856-1928
2
1858-1932
2
1862-1931
2
1865-1898
2
more ...