Historical Period
20th century
115
19th century
73
18th century
28
21st century
27
To 1500
15
1945-
12
1980-
11
Civil War, 1861-1865
9
1991-
6
1775-1783
5
1865-1918
5
1989-
5
1809-1858
4
1960-
4
1988-
4
1660-1688
3
1783-1809
3
1783-1865
3
1789-1869
3
1861-1865
3
1865-1877
3
1869-1934
3
1870-1940
3
1871-1918
3
1889-1945
3
1909-1918
3
1918-1933
3
1933-1945
3
1934-
3
1948-1967
3
1990-
3
2002-
3
Revolution, 1775-1783
3
To 146 B.C.
3
Unification, 1990
3
1503-1734
2
1604-1654
2
1700-1799
2
1743-1826
2
1775-1865
2
1782-1862
2
1783-1789
2
1789-1799
2
1799-1917
2
17th century
2
1805-1859
2
1810-
2
1841-1925
2
1842-1918
2
1844-1930
2
more ...