Era
20th century
18
1945-
9
18th century
7
1989-
5
19th century
5
17th century
3
1918-1945
3
1933-1945
2
1945-1989
2
1955-1965
2
1975-
2
1558-1603
1
1649-1775
1
1760-1825
1
1772-1834
1
1783-1789
1
1783-1865
1
1784-1857
1
1789-1820
1
1822-1903
1
1865-1918
1
1894-1971
1
1917-1936
1
1918-1933
1
1918-1938
1
1936-1953
1
1944-
1
1945-1965
1
1947-
1
1949-1976
1
1953-
1
1961-
1
1961-1971
1
1963-1969
1
1969-
1
1971-
1
1981-
1
1981-1989
1
1982-
1
1989-1993
1
2001-
1
21st century
1
2oth century
1
Empire, 30 B.C.-476 A.D
1
Periodicals
1
Restoration, 1660-1700
1
Revolution, 1775-1783
1
Revolution, 1965
1
Russian intervention, 1968-
1
Stuarts, 1603-1714
1
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