Era
20th century
63
19th century
27
21st century
25
1945-
7
18th century
6
17th century
5
1933-1945
5
1989-
5
Civil War, 1861-1865
5
1945-1989
3
Early modern, 1500-1700
3
16th century
2
1743-1826
2
1815-1861
2
1878-1953
2
1918-1945
2
1918-1961
2
1926-1984
2
1936-1953
2
1945-1990
2
1961-1969
2
1976-2002
2
2001-
2
2002-
2
2017-
2
Revolution, 1775-1783
2
1268-1559
1
1564-1616
1
1591-1674
1
1608-1674
1
1622-1673
1
1775-1865
1
1783-1865
1
1789-1815
1
1789-1900
1
1789-1945
1
1801-1809
1
1812-1870
1
1818-1883
1
1818-1900
1
1828-1910
1
1837-1901
1
1840-1893
1
1849
1
1849-1861
1
1854-1900
1
1856-1939
1
1865-1939
1
1869-1948
1
1871-1918
1
more ...