Era
1951-
72
1865-1950
70
19th century
47
1775-1865
44
20th century
38
Civil War, 1861-1865
30
1865-
20
1865-1877
12
1815-1861
8
1865-1900
7
1945-
6
1945-1989
6
1783-1865
5
1933-1945
5
1794-1865
4
1863-1877
4
1865-1945
4
1989-
4
To 1775
4
1767-1845
3
1857-1861
3
1861-1865
3
1865-1951
3
18th century
3
1918-
3
1924-
3
1832-1904
2
1849-1853
2
1850-1889
2
1865-1933
2
1877-1964
2
1882-1945
2
1887-1940
2
1908-1973
2
1918-1961
2
1977-1981
2
2001-2009
2
21st century
2
Since 1865
2
To 1865
2
To 1964
2
1744-1822
1
1775-1783
1
1775-1899
1
1789-1797
1
1789-1815
1
1789-1869
1
1799-1871
1
1800-1899
1
1800-1950
1
more ...