Era
20th century
164
21st century
55
19th century
49
1896-1980
29
18th century
8
1929
7
1812-1870
6
1945-
6
17th century
5
2008
5
Civil War, 1861-1865
5
1933-1945
4
1970-
4
1986
4
1988
4
To 1500
4
1564-1616
3
1832-1898
3
1843-1916
3
1858-1919
3
1867-1957
3
1884-1972
3
1896-1934
3
1925-
3
1946-
3
1968
3
1974-
3
1997-
3
2002
3
2009
3
2009-
3
Civil War, 2011-
3
-1400
2
16th century
2
1732-1799
2
1743-1826
2
1775-1865
2
1814?-1884
2
1832-1888
2
1849-1924
2
1850-1894
2
1866-1943
2
1877-1956
2
1877-1964
2
1879-1955
2
1882-1956
2
1894-1962
2
1899-1985
2
1904-1973
2
1918-1932
2
more ...