Era
1706-1790
104
1775-1783
77
Revolution, 1775-1783
50
1783-1809
43
20th century
41
18th century
37
1945-1989
31
1757-1804
30
1783-1789
22
1808-1889
22
1783-1865
20
1923-
18
Civil War, 1861-1865
18
1969-1974
17
1743-1826
16
1751-1836
15
1783-1815
14
1775-1865
13
19th century
13
To 1775
13
1745-1829
12
1861-1865
12
1732-1799
11
1752-1816
11
1933-1945
11
1809-1865
10
1893-1971
10
1900-1999
10
1735-1826
9
1856-1941
9
1945-1953
9
1974-1977
9
1838-1905
8
1880-1959
8
1904-1971
8
1767-1848
7
1777-1852
7
1809-1817
7
1865-1933
7
1900-1965
7
1945-
7
1989-
7
1700-1799
6
1723-1794
6
1789-1815
6
1815-1861
6
1821-1875
6
Colonial period, ca. 1600-1775
6
1725-1792
5
1755-1835
5
more ...