Era
1723-1790
6
1564-1616
5
1918-1945
5
To 1865
5
Colonial period, ca. 1600-1775
4
Revolution, 1775-1783
4
1772-1823
3
18th century
3
19th century
3
Revolution, 1789-1799
3
1775-1783
2
1783-1789
2
1783-1865
2
17th century
2
1857-1929
2
Civil War, 1861-1865
2
Confederation, 1783-1789
2
1483-1546
1
1632-1704
1
1694-1774
1
1694-1778
1
1734-1806
1
1741-1812
1
1748-1832
1
1758-1794
1
1763-1835
1
1764-1825
1
1765-1947
1
1768-1835
1
1773-1854
1
1777-1835
1
1783-1860
1
1786-1862
1
1789-1846
1
1789-1869
1
1791-1841
1
1791-1872
1
1802-1842
1
1806-1873
1
1811-1863
1
1821-1905
1
1836-1837
1
1842-1924
1
1855
1
1861-1865
1
1861-1934
1
1871-1918
1
1883-1946
1
1883-1950
1
1918-1947
1
more ...