Era
20th century
30
19th century
14
1945-
5
21st century
4
1883-1945
3
18th century
3
1914-1945
3
1918-1945
3
1960-1980
3
1989-
2
1997-
2
1172-1603
1
1371-1435
1
1399-1485
1
1485-1603
1
1603-1714
1
1688-1744
1
1760-1860
1
1789-
1
1789-1900
1
17th century
1
1800-1837
1
1815-1870
1
1815-1898
1
1819-1891
1
1827-1911
1
1837-1901
1
1848-1871
1
1861-1912
1
1871-1888
1
1871-1918
1
1882-1941
1
1908-1974
1
1927-
1
1945-1970
1
1945-1995
1
1959-1990
1
1960-
1
1961-1963
1
1961-1969
1
1963-1969
1
1990-
1
1993-
1
1995-
1
2004
1
Civil War, 1998-
1
Lancaster and York, 1399-1485
1
Ming dynasty, 1368-1644
1
Republic, 1912-1949
1
Revolution, 1789-1804
1
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