Era
20th century
10
1900-1999
6
1940-2020
6
1929-1968
3
1940 February 21-
3
1960-
3
Revolution, 1775-1783
3
1809-1865
2
1874-1922
2
1878-1947
2
1883-1941
2
1939-1945
2
1946-
2
1955-2011
2
2000-2020
2
Civil War, 1861-1865
2
1677-1759
1
1706-1790
1
1732-1799
1
1755-1776
1
1775-1783
1
1800-1874
1
1800-1899
1
1815-1861
1
1815-1865
1
1822-1913
1
1847-1922
1
1847-1931
1
1849-1877
1
1850-1950
1
1856-1943
1
1858-1919
1
1861-1865
1
1874-1926
1
1877-1927
1
1893-1947
1
1898-1976
1
18th century
1
1901-1966
1
1907-1964
1
1908-1973
1
1916-2004
1
1920-1985
1
1928-
1
1929
1
1937-
1
1940-
1
1945-
1
1948-1985
1
1959-1990
1
more ...