Era
1988-
21
21st century
9
Eocene
9
Paleocene
6
20th century
5
2001-
4
1936-2021
3
1947-
3
1957-2011
3
1997-
3
19th century
3
Permian
3
1876-1948
2
1919-1947
2
1953-2007
2
1971-1988
2
Dhofar War, 1964-1976
2
Mesozoic
2
Soviet occupation, 1979-1989
2
Tertiary
2
-1880
1
-1900
1
1856-1920
1
1857-1919
1
1866-1955
1
1873-1933
1
1874-1922
1
1928-1979
1
1941-2010
1
1945-
1
1947-1971
1
1947-1984
1
1952-
1
1955-
1
1960-
1
1972
1
1973-1989
1
1975-
1
1975-1979
1
1977-
1
2017-2021
1
British occupation, 1765-1947
1
Cretaceous
1
Partition, 1947
1
Revolution, 1971
1
To 324 B.C.
1