Era
20th century
97
1980-
23
19th century
22
21st century
22
1945-
19
18th century
11
1945-1989
8
1933-1945
7
Revolution, 1775-1783
7
1865-1918
6
1971-
5
1913-1921
3
1918-1945
3
1961-1970
3
1970-
3
1981-2001
3
1989-
3
2001-
3
2001-2009
3
Civil War, 1861-1865
3
1775-1783
2
1783-1865
2
1915-1959
2
1917-1963
2
1945-1970
2
1946-
2
1950-
2
1951-1960
2
1953-1961
2
1955-1965
2
1960-
2
1960-1980
2
1965-1975
2
To 1865
2
1742-1840
1
17th century
1
1807-1873
1
1817?-1895
1
1820?-1913
1
1856-1915
1
1865-1921
1
1878-1968
1
1886-1938
1
1890-1969
1
1894-1971
1
1895?-1937
1
1897-1993
1
1900 - 1999
1
1908-1957
1
1914-
1
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