Era
Revolution, 1775-1783
11
1775-1783
8
Colonial period, ca. 1600-1775
8
1783-1789
6
1815-1861
5
To 1775
5
1775-1865
3
1789-1797
3
1789-1809
3
1845-1849
3
1861-1865
3
1865-1869
3
1737-1804
2
1783-1809
2
1789-1815
2
1802-1878
2
1809-1817
2
1849-1877
2
18th century
2
Civil War, 1861-1865
2
Confederation, 1783-1789
2
War of 1812
2
War with Mexico, 1845-1848
2
1706-1790
1
1735-1826
1
1745-1829
1
1751-1836
1
1754-1816
1
1775-1781, Revolution
1
1782-1850
1
1782-1862
1
1783-1815
1
1783-1865
1
1789-1869
1
1791-1868
1
1800-1874
1
1809-1865
1
1812-1815
1
1822-1885
1
1830-1903
1
1849-1861
1
1857-1861
1
1865-
1
1869-1877
1
1880-1970
1
1884-1972
1
1908-1973
1
1933-1953
1
1945-1989
1
1963-1969
1
more ...