Era
20th century
107
1564-1616
30
19th century
25
Colonial period, ca. 1600-1775
23
1945-1989
19
Civil War, 1861-1865
19
18th century
14
Early modern, 1500-1700
13
1809-1865
12
To 1775
12
Early church, ca. 30-600
11
1789-1900
9
1918-1945
9
Old English, ca. 450-1100
9
1818-1883
8
1945-
8
Revolution, 1775-1783
8
1412-1431
7
1783-1865
7
1815-1861
7
1871-1918
7
1933-1945
7
1608-1674
6
1775-1865
6
17th century
6
1819-1891
6
1913-1921
6
1945-1964
6
Revolution, 1789-1799
6
-1400
5
1588-1679
5
1685-1750
5
1743-1826
5
1865-1950
5
1955-1965
5
476-1492
5
Puritan Revolution, 1642-1660
5
16th century
4
1842-1910
4
1856-1924
4
1858-1919
4
1861-1865
4
1866-1895
4
1882-1945
4
1889-1945
4
354-430
4
Conquest, 1522-1548
4
Cretaceous
4
Modern period, 1500-
4
Revolution, 1917-1921
4
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