Era
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1881-1973
2
1887-1975
2
1896-1988
2
1900 - 2099
2
1926-
2
1945-1960
2
1945-1964
2
1945-1991
2
1945-1992
2
1947-
2
1955-1965
2
1960-1990
2
1961-1971
2
1964-1979
2
1965-
2
1973-
2
1976-2002
2
1979-
2
1985-1991
2
1992-
2
1995-
2
1997-
2
Civil War, 1861-1865
2
Colonial period, ca. 1600-1775
2
Since 1995
2
To 1492
2
To 1775
2
To 1900
2
To 987
2
Unification, 1990
2
-1734
1
1057-1603
1
1492-1648
1
14th century
1
1500-1599
1
1500-1799
1
1600-1775
1
1600-1837
1
1600-1918
1
1613-1700
1
1623-1687
1
1632-1704
1
1644 - 1912
1
1644-1912
1
1648-1789
1
1694-1774
1
1700 - 1799
1
1714-1837
1
1727-1781
1
1743-1794
1
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