Era
18th century
18
1783-1789
12
1783-1865
11
1783-1809
7
19th century
7
20th century
7
1751-1836
6
1861-1865
5
Civil War, 1861-1865
5
1775-1783
4
Revolution, 1775-1783
4
1743-1826
3
1755-1835
3
1775-1865
3
1809-1865
3
1961-1969
3
1969
3
21st century
3
1000-1699
2
1175-1235
2
1783-1815
2
17th century
2
1868-1912
2
1929
2
265-30 B.C.
2
Confederation, 1783-1789
2
Constitutional period, 1789-1809
2
To 1865
2
1050-1106
1
1611-1677
1
1689-1755
1
1732-1799
1
1735-1826
1
1767-1845
1
1778-1868
1
1788-1850
1
1789-1797
1
1789-1900
1
1790-1862
1
1808-1873
1
1808-1875
1
1816-1899
1
1818-1895
1
1829-1837
1
1833-1911
1
1857-1861
1
1865-1869
1
1865-1877
1
1865-1933
1
1867-1959
1
more ...