Era
20th century
17
19th century
8
21st century
7
1981-1989
6
1945-
5
Revolution, 1775-1783
5
1945-1989
4
1965-
4
1981-2001
4
1993-2001
4
18th century
3
1933-1945
3
2001-2009
3
Quaternary
3
World War, 1939-1945
3
1743-1826
2
1884-1972
2
1924-
2
1945-1953
2
1960-1980
2
1969-1974
2
1971-1981
2
1980-2020
2
1981-1993
2
1985-1991
2
1997-
2
Korean War, 1950-1953
2
Mesozoic
2
To 1863
2
-1985
1
1656-1680
1
1755-1835
1
1783-1789
1
17th century
1
1809-1865
1
1844-1924
1
1856-1924
1
1861-1865
1
1862-1928
1
1874-1948
1
1876-1956
1
1882-1945
1
1886-1971
1
1888-1959
1
1893-1975
1
1897-1962
1
1901-1953
1
1904-2005
1
1907-1964
1
1912-1956
1
more ...