Era
20th century
114
21st century
64
1900-1999
56
19th century
48
2000-2099
27
1800-1899
22
Civil War, 1861-1865
16
1907-1964
12
2010
9
2011
8
Ming dynasty, 1368-1644
8
1800-1999
6
1945-1989
6
1946-
6
1980
6
Qing dynasty, 1644-1912
6
To 1500
6
16th century
5
1989-
5
1991
5
1800 - 1899
4
18th century
4
1900-2099
4
2005
4
Since 1945
4
Since 2000
4
Yuan dynasty, 1260-1368
4
1948-
3
1958-
3
1977-1981
3
1986
3
1990-
3
1991-
3
2000-
3
2001
3
2002-
3
Conquest, 1519-1540
3
Revolution, 1910-1920
3
Spanish colony, 1540-1810
3
World War, 1939-1945
3
1288-1918
2
1707-1788
2
1743-1826
2
1766-1834
2
1775-1865
2
17th century
2
1819-1891
2
1830-1901
2
1843-1908
2
1850-1928
2
more ...