Era
20th century
32
19th century
11
18th century
7
2001-2009
4
Quaternary
4
To 1600
4
To 1900
4
World War, 1939-1945
4
-1400
3
17th century
3
1904-1973
3
1955-1983
3
1989-
3
2003-
3
21st century
3
Civil War, 1861-1865
3
Cretaceous
3
Meiji period, 1868-1912
3
Wars of Independence, 1806-1830
3
1330?-1400?
2
1392-1910
2
1822-1832
2
1853-1895
2
1920-2009
2
1940-
2
1945-
2
1976-2000
2
1982-
2
1990-
2
1992-
2
1993-
2
Chosŏn dynasty, 1392-1910
2
Classical period, 1500-1700
2
Gempei Wars, 1180-1185
2
Holocene
2
Middle English, 1100-1500
2
Modern period, 1500-
2
Tertiary
2
To 1500
2
To 1603
2
To 1810
2
1035-1110
1
1057-1603
1
1100-1500
1
1225?-1274
1
1265-1321
1
1485-1603
1
1542-1587
1
1603-1649
1
1608-1674
1
more ...