Era
Civil War, 1861-1865
538
2000-2020
388
20th century
209
19th century
206
1970-2000
130
18th century
69
1920-1950
69
1800-1850
52
Revolution, 1775-1783
48
1850-1900
45
1900-1999
44
20e siècle
41
1950-1970
36
17th century
32
2020-2040
32
1564-1616
30
1909-2001
27
21st century
25
1861-1865
24
1800-1899
23
1767-1845
17
1815-1861
17
Colonial period, ca. 1600-1775
16
16th century
15
1821-1877
15
1880-1920
15
19e siècle
15
1775-1865
13
1807-1870
12
1822-1885
12
1950-2000
12
1809-1865
11
1861-1865 (Guerre de Sécession)
11
1900-1950
11
1608-1674
10
1980-2000
10
To 1519
10
To 1865
10
1865-1950
9
1882-1941
9
To 1500
9
1808-1889
8
1824-1863
8
1842-1863
8
1897-1962
8
1911-1920
8
1933-1945
8
Early modern, 1500-1700
8
1732-1799
7
1783-1865
7
more ...