Era
Civil War, 1861-1865
15
19th century
6
20th century
6
20th century --
6
1945-1989
5
1989-
4
1946-
3
1970-
3
19th century --
3
2001-2009
3
1783-1865
2
19th centur --
2
2001-
2
21st century
2
Colonial period, ca. 1600-1775
2
To 1789
2
1600-1659
1
1735-18
1
1744-18
1
1762-1829
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
1838-1905
1
1842-1874
1
1845-1861
1
1849-1861
1
1850-1950
1
1861-1865
1
1865-1877
1
1882-1965
1
1890-1969
1
1891-1937
1
1894-1971
1
1910-
1
1913-1921
1
1913-1994
1
1918-1945
1
1919-1933
1
1921-
1
1923-1929
1
1929-1968
1
1932-
1
1941-1979
1
more ...