Era
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1914-1940
2
1917-1980
2
1918-1945
2
1931-1940
2
1936-1953
2
1939-2017
2
1945-1992
2
1946-1970
2
1960-1980
2
1968-1989
2
1970-1988
2
1976-2000
2
1980-2020
2
1981-2001
2
1998-
2
1999-
2
2000-
2
2002-
2
20h century
2
265-30 B.C.
2
Civil War, 1861-1865
2
Edward VI, 1547-1553
2
Republic, 265-30 B.C.
2
Revolution, 1958
2
Since 1980
2
Since 2000
2
Since 2002
2
Stuarts, 1603-1714
2
To 146 B.C.
2
To 1865
2
Unification, 1990
2
Victoria, 1837-1901
2
1288-1918
1
1369-1644
1
1400-1648
1
1492-1699
1
1500-1599
1
1526-1699
1
1558-1603
1
15th century
1
1600-1714
1
1600-1799
1
1649-1705
1
1775-1783
1
1775-1815
1
1783-1815
1
1789-1820
1
1789-1900
1
17th Century
1
1800-1960
1
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