Era
20th century
104
19th century
97
1900-1999
46
18th century
43
1800-1899
33
21st century
17
17th century
16
Civil War, 1861-1865
14
1800-1999
12
-632
11
1700-1799
11
1700-1899
9
1945-1989
8
1946-
7
1789-1797
6
1900-2099
6
1945-
6
1969-1974
6
2000-2099
6
Revolution, 1789-1799
6
1761-1849
5
1933-1945
5
1989-
5
1993-2001
5
Since 1993
5
1809-1865
4
1812-1870
4
1860-1949
4
1914-1918
4
1939-1945
4
1955-
4
1965-1975
4
2001-2009
4
1599-1658
3
1649-1705
3
1660-1688
3
1738-1820
3
1769-1821
3
1775-1817
3
1788-1824
3
1819-1880
3
1821-1867
3
1828-1906
3
1835-1910
3
1840-1928
3
1856-1939
3
1857-1903
3
1857-1924
3
1861-1865
3
1867-1914
3
more ...