Era
20th century
251
19th century
38
1900-1999
15
1930-1940
15
1970-1980
13
1920-1930
10
1934-
9
1949-
9
1884-1962
7
1898-1943
7
1920-
7
1937-
7
1942-
7
1944-
7
Republic, 1912-1949
7
1884-1950
6
1886-1983
6
1896-1940
6
18th century
6
1900-1910
6
1912-1949
6
1935-
6
1940-1950
6
1957-
6
1960-1970
6
Revolution, 1910-1920
6
1870-1900
5
1900-
5
1910-1940
5
1926-
5
1929-1968
5
1930s-1940s
5
1932-
5
1936
5
1936-
5
1939-
5
1940
5
1940-
5
1946-
5
1950-
5
1952-
5
1954-
5
Boxer Rebellion, 1899-1901
5
1879-1970
4
1882-1941
4
1888-1953
4
1888-1965
4
1895-1976
4
1898-1976
4
1899-1974
4
more ...