Era
20th century
168
19th century
101
1918-1961
33
18th century
32
Civil War, 1861-1865
26
1900-1999
18
20e siècle
17
Revolution, 1775-1783
14
21st century
13
1809-1858
12
2003
12
17th century
10
1800-1899
10
2001-2009
10
1809-1865
9
2005
9
1946-
8
2004
8
1933-1945
7
2009-
7
1918-
6
1945-
6
1947-2017
6
1948-
6
19e siècle
6
2001
6
1700-1799
5
1775-1865
5
1918-1961 Trials, litigation, etc
5
1947-
5
1989-
5
1993-
5
Rebellion, 1914-1915
5
United States
5
16th century
4
1777-1864
4
1806 or 1807-1857
4
1849-1877
4
1884-1972
4
1890-1969, USMA 1915
4
1939-1945
4
1945-1989
4
1967-
4
1971-1981
4
1980-
4
1981-1989
4
2006
4
Geschichte
4
To 146 B.C.
4
1735-1826
3
more ...