Era
20th century
138
19th century
46
1945-1953
15
1953-1961
15
1929
12
21st century
12
1901-1953
10
Civil War, 1861-1865
8
1945-
5
1969
5
1865-1918
4
1887-1986
4
18th century
4
1819-1891
3
1928-1987
3
1945-1989
3
1564-1616
2
1775-1783
2
17th century
2
1834-1903
2
1844-1916
2
1849-1916
2
1858-1942
2
1867-1959
2
1877-1943
2
1916-2009
2
1918-1945
2
1933-1945
2
1940-2020
2
Revolution, 1775-1783
2
1584-1666
1
1606-1669
1
1632-1675
1
16th century
1
1706-1790
1
1757-1804
1
1769-1859
1
1770-1827
1
1771-1810
1
1783-1865
1
1791-1872
1
1801-1877
1
1808-1889
1
1809-1865
1
1809-1882
1
1813-1894
1
1817-1904
1
1818-1895
1
1819-1900
1
1819-1905
1
more ...