Era
Civil War, 1861-1865
15
19th century
5
20th century --
4
1970-
3
19th century --
3
2001-2009
3
20th century
3
1783-1865
2
1945-1989
2
1946-
2
1989-
2
19th centur --
2
21st century
2
1600-1659
1
1735-18
1
1744-18
1
1775-1783
1
1782-185
1
1791-183
1
1809-18
1
1815-1861
1
1822-188
1
1824-186
1
1829-1837
1
1830 or 31-188
1
1842-1874
1
1845-1861
1
1849-1861
1
1850-1950
1
1861-1865
1
1865-1877
1
1882-1965
1
1891-1937
1
1910-
1
1913-1921
1
1913-1994
1
1918-1945
1
1919-1933
1
1929-1968
1
1932-
1
1941-1979
1
1945
1
1946
1
1951-
1
1961-
1
1964-
1
1971-
1
1973-
1
1980-
1
1993-2001
1
more ...