Era
20th century
122
19th century
50
21st century
14
18th century
13
1933-1945
13
1945-1989
13
1865-1950
12
1989-
10
1960-
9
2001-2009
9
1946-
8
1948-
8
1775-1865
7
2009-2017
7
17th century
6
1945-
6
1951-
6
Civil War, 1861-1865
6
1815-1861
5
1870-1940
5
1918-1933
5
1945-1953
5
1789-1815
4
1910-1946
4
1964-1985
4
1975-
4
1980-
4
1988-
4
1993-
4
To 1775
4
1775-1783
3
1859-1935
3
1861-1865
3
1889-1945
3
1900-1999
3
1918-1945
3
1919-1933
3
1949-
3
1955-1983
3
1958-
3
1963-1969
3
1969-1974
3
1976-2002
3
1979-1997
3
1982-
3
1990-
3
1991-
3
Tiananmen Square Incident, 1989
3
To 1950
3
1485-
2
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