Era
20th century
1,266
1564-1616
369
19th century
366
1900-1999
318
1939-1945
279
1900 - 1999
164
21st century
121
1800-1899
108
1945-
97
18th century
88
1947-
79
17th century
64
Civil War, 1861-1865
64
Revolution, 1917-1921
62
1957-
57
1933-1945
54
1960-
54
German occupation, 1940-1945
53
Early modern and Elizabethan, 1500-1600
49
1939 - 1945
48
British occupation, 1765-1947
47
Civil War, 1936-1939
47
1946-
46
1949-
46
1914-1918
44
1948-
43
1929
41
1942-
41
1955-
40
1860-1904
38
1812-1870
37
1954-
37
1775-1817
36
1952-
36
1939-
35
1943-
35
1944-
35
1958-
35
1959-
35
1961-
35
1930-
34
1971-
34
1821-1881
33
1828-1910
33
1962-
33
1953-
32
2000-2099
32
1935-
31
1964-
31
1700-1799
30
more ...