Era
1946-
42
1995-
28
20th century
28
19th century
22
Civil War, 1861-1865
15
Revolution, 1775-1783
13
1929-1968
12
1959-
9
2020
9
21st century
9
1805-1880
6
1890-1969
5
1960-
5
1972-
5
1735-1826
4
1778-1803
4
1954-
4
1957-
4
1961-
4
1963-
4
1964-
4
1967-
4
2021-
4
1725-1792
3
1779-1843
3
17th century
3
1809-1865
3
18th century
3
1947-
3
1955-
3
1956-
3
1966-
3
1968-
3
1970-
3
1974-
3
1732-1795
2
1743-1826
2
1754-1825
2
1794-1858
2
1818-1895
2
1838-1865
2
1850-1937
2
1917-1963
2
1917-2001
2
1930-2023
2
1933-1945
2
1933-2020
2
1947-2017
2
1948-
2
1950-
2
more ...