Era
20th century
20
Civil War, 1861-1865
8
1856-1941
6
Revolution, 1775-1783
6
18th century
5
19th century
5
1819-1900
4
1706-1790
3
1789-1945
3
1863-1940
3
1889-
3
1896-
3
1945-
3
1740-1785
2
1792-1862
2
17th century
2
1810-1879
2
1810-1892
2
1849-1887
2
1850-1926
2
1856-1929
2
1867-1940
2
1869-1933
2
1872-1959
2
1880-1947
2
1881-1949
2
1890-1965
2
1898-1981
2
1900-1999
2
1917-1970
2
1933-1945
2
1939-1945
2
1945-1989
2
Colonial period, ca. 1600-1775
2
1723-1795
1
1727-1795
1
1732-1799
1
1733-1777
1
1738-1801
1
1740-1811
1
1742-1815
1
1775-1854
1
1785-1851
1
1800-1899
1
1805-1845
1
1807-1883
1
1809-1865
1
1811-1884
1
1813-1890
1
1823-1897
1
more ...