Era
20th century
271
1900-1999
79
19th century
73
1533-1917
58
Civil War, 1861-1865
56
18th century
47
20e siècle
47
21st century
43
1564-1616
25
1800-1899
22
19e siècle
21
1700-1799
19
1975-
19
Revolution, 1775-1783
18
2000-2099
17
1939-1945
16
1950-
16
1861-1865
15
1914-1918
15
1853-1890
14
18e siècle
14
1994-
12
French and Indian War, 1754-1763
12
1945-1976
11
1976-
11
1857-1891
10
1795-1821
8
1861-1865 (Guerre de Sécession)
8
1950-1953
8
1961-1975
8
21e siècle
8
Civil War, 1922-1923
8
To 1500
8
War of Independence, 1919-1921
8
1809-1865
7
1821-1881
7
1959-
7
1800-1865
6
1811-1874
6
1833-1893
6
1838-1865
6
1881-1947
6
1885-1947
6
1902-1968
6
1917-1963
6
1930-
6
1933-
6
1933-1945
6
1945-
6
1969-2006
6
more ...