Era
20th century
123
1706-1790
110
1775-1783
84
18th century
73
Revolution, 1775-1783
72
19th century
63
1783-1809
45
1869-1948
40
1757-1804
32
1900-1999
32
1945-1989
32
16th century
29
1837-1901
28
1933-1945
26
1783-1789
22
1808-1889
22
1945-
22
Civil War, 1861-1865
22
Henry VIII, 1509-1547
22
1478-1535
21
1743-1826
21
1775-1865
21
1783-1865
21
1815-1898
21
1923-
19
1700-1799
18
Republic, 265-30 B.C.
18
1969-1974
17
1729-1797
15
1751-1836
15
1757-1834
15
17th century
15
1783-1815
14
1918-1933
14
To 1775
14
1732-1799
13
1745-1829
12
1800-1899
12
1861-1865
12
1901-1936
12
265-30 B.C.
12
1421-1737
11
1509-1547
11
1752-1816
11
1789-1815
11
1809-1865
11
1815-1870
11
Colonial period, ca. 1600-1775
11
1893-1971
10
1989-
10
more ...