Era
20th century
20
1994-
8
1961-1994
4
1918-
3
1948-1994
3
1961-
3
1945-
2
1948-1961
2
1960-
2
1975-
2
1978-
2
1978-1989
2
1989-
2
1989-1994
2
1991-
2
21st century
2
1901-1966
1
1906-1970
1
1909-1961
1
1910-2001
1
1917-
1
1918-1961
1
1928-1967
1
1929-1968
1
1935-2015
1
1945-1989
1
1946-1977
1
1948-
1
1956-
1
1960-1980
1
1961-1978
1
1966-
1
1969-1994
1
1980-
1
20TH CENTURY
1
Civil War, 1975-
1
South African Incursions, 1978-1990
1
d. 1986
1