Era
21st century
21
20th century
18
2009-
7
1981-
6
2001-2009
6
1963-
5
1960-
4
1981-2001
4
1918-1945
3
1929
3
1945-
3
1959-
3
1976-2000
3
1993-2001
3
19th century
3
2000-
3
Civil War, 1861-1865
3
1723-1790
2
1901-1953
2
1941-
2
1944-
2
1946-
2
1956-
2
1969-
2
1971-
2
1978-
2
1980-
2
Medieval, 500-1500
2
-1942
1
1066-1485
1
16th century
1
1770-1831
1
1810-1891
1
1817-1874
1
1898-1951
1
18th century
1
1904-1991
1
1907-1991
1
1912-1926
1
1912-1993
1
1917-2018
1
1924-
1
1936-
1
1949-
1
1950-
1
1953-
1
1954-
1
1960
1
1960-1980
1
1962-
1
more ...