Historical Period
20th century
329
19th century
228
21st century
47
1918-1945
27
18th century
26
Civil War, 1861-1865
17
1945-
14
1914-1945
13
Revolution, 1917-1921
13
1865-1918
12
1900-1999
10
1980-2020
10
1944-
7
1945-1989
7
1958-
7
17th century
6
1837-1901
6
1929
6
1933-1945
6
2009-
6
1865-1900
5
1918-1933
5
1981-2001
5
1991-
5
Colonial period, ca. 1600-1775
5
To 1865
5
1800-1837
4
1800-1999
4
1865-1921
4
1917-1936
4
1918-1932
4
1928-1932
4
Revolution, 1775-1783
4
Revolution, 1905-1907
4
Revolution, 1918
4
To 1500
4
1760-1860
3
1789-1820
3
1800-1899
3
1815-1861
3
1854-1951
3
1870-1924
3
1879-1915
3
1884-1962
3
1894-1917
3
1945-1960
3
1980-1989
3
1981-1990
3
1995-
3
2000-
3
more ...