Era
Revolution, 1905-1907
208
1904-1914
207
20th century
126
19th century
61
1900-1999
59
21st century
53
Civil War, 1861-1865
38
Revolution, 1775-1783
32
1800-1837
27
1914-1918
26
1809-1865
22
2000-2099
22
18th century
21
1759-1806
18
1904 - 1914
18
1939-1945
18
1861-1865
17
1946-
16
1789-1820
14
1800-1899
14
1738-1820
13
1900 - 1999
13
1951-
13
1820
12
1945-
12
1994-
12
1762-1830
11
1768-1821
10
1791
10
1749-1806
9
1933-1945
9
Since 1994
9
1861 - 1865
8
1905-1907
8
1910-1991
8
1948-
8
1977-
8
1713-1792
7
1769-1821
7
1837-1901
7
1910-1920
7
1945-1989
7
2017-
7
George III, 1760-1820
7
Since 1977
7
1749-1822
6
1751-1816
6
1760-1789
6
1760-1820
6
1760-1824
6
more ...