Era
Colonial period, ca. 1600-1775
34
Revolution, 1775-1783
14
1644-1718
8
1775-1865
8
Civil War, 1861-1865
8
To 1775
6
1775-1783
4
1725-1807
3
1797-1801
3
1865-1950
3
1918-
3
1951-
3
19th century
3
French and Indian War, 1754-1763
3
Revolution
3
1674-1751
2
1706-1790
2
1732-1799
2
1748-1836
2
1750-1831
2
1759-1817
2
1768-1846
2
1799 or 1800-1875
2
1809-1865
2
1855-
2
1898-1974
2
20th century
2
Civil War
2
Devonian
2
ca. 1676-1741
2
d. 1893
2
-1798
1
1590-1662
1
1603-1714
1
1621-1670
1
1671-1726
1
1680?-1746
1
1696-1760
1
1700-1746
1
1702-1775
1
1706-1771
1
1707-1759
1
1713-1763 (New France)
1
1717-1776
1
1724-1777
1
1728-1786
1
1737-1791
1
1741-1801
1
1741-1827
1
1744-1800
1
more ...