Historical Period
20th century
21
19th century
13
1981-2001
7
21st century
6
17th century
5
To 1865
5
1865-1918
4
1960-
4
18th century
3
1945-
3
1952-
3
1918-
2
1970-
2
1972-
2
1980-
2
1990-
2
1992-
2
Qing dynasty, 1644-1912
2
1800-1899
1
1840-1897
1
1865-1900
1
1918-1945
1
1918-1952
1
1926-1984
1
1943-
1
1955-1983
1
1970-1994
1
1974-
1
1974-2009
1
1980-2020
1
1982-
1
1982-1994
1
1988-2000
1
1991-
1
2009-
1
Dirty War, 1976-1983
1
Revolution, 1954
1