Historical Period
20th century
70
19th century
25
21st century
13
Civil War, 1861-1865
12
1960-1980
9
18th century
7
1865-1900
5
1865-1918
5
1960-
5
1975-
5
1989-
5
To 1865
5
1775-1865
4
1801-1917
4
1894-1917
4
1900-1999
4
1918-1945
4
1789-1815
3
1865-1898
3
1865-1950
3
1904-1914
3
1932-2010
3
1974-
3
1977-
3
1977-1981
3
1985-
3
1796-1918
2
17th century
2
1815-1861
2
1861-1865
2
1880-1943
2
1899-1956
2
1900-1960
2
1917-1936
2
1917-1945
2
1918-1932
2
1918-1933
2
1919-1933
2
1924-
2
1925-1961
2
1933-1945
2
1935-
2
1940-1945
2
1943-1955
2
1945-
2
1945-1980
2
1945-1989
2
1947-
2
1958-1974
2
1958-1984
2
more ...