Era
20th century
431
1900-1999
108
19th century
101
1945-
62
Since 1900
38
21st century
32
1918-1945
31
1800-1899
25
1945-1989
20
1945-1970
17
1980-
16
1800-1999
14
1970-
14
1971-
14
1960-1980
13
2000-2099
12
1783-1865
11
1865-1918
11
1933-1945
9
1989-
9
1900 - 1999
8
1961-1969
8
Civil War, 1861-1865
8
1919-1933
7
18th century
6
1900-2099
6
1918-1932
6
1981-1989
6
1917-1963
5
1929
5
1815-1861
4
1835-1910
4
1969-
4
1969-1974
4
1564-1616
3
1700-1899
3
1800 - 1899
3
1810-1891
3
1895-1972
3
1897-1962
3
1920-2012
3
1935-1977
3
1953-1961
3
1974-1977
3
Revolution, 1775-1783
3
Since 1945
3
-1836
2
1757-1804
2
1789-1851
2
1812-1870
2
more ...