Era
20th century
83
21st century
27
19th century
20
18th century
6
Civil War, 1861-1865
6
1946-
5
1945-1989
4
1863-1877
3
1877-1964
3
1913-1980
3
1941-1955
3
1961-1969
3
1995-2012
3
1835-1910
2
1878-1946
2
1929
2
1929-1968
2
1948-
2
1953-1961
2
1975-
2
1980-2020
2
2001-2009
2
Revolution, 1775-1783
2
-1865
1
-1999
1
1783-1865
1
1789-1900
1
1797-1874
1
17th century
1
1800-1859
1
1808-1875
1
1813-1865
1
1818-1895
1
1825-1911
1
1830-1948
1
1831-1890
1
1839-1876
1
1844-1925
1
1855-1927
1
1857-1924
1
1858-1942
1
1865-
1
1865-1900
1
1868-1935
1
1868-1963
1
1875-1899
1
1880-1945
1
1887-1948
1
1889-1976
1
1889-1999
1
more ...