Era
20th century
64
1900-1999
14
1939-1945
10
21st century
9
1898-1972
7
1975-1985
6
1985-1991
6
2000-2099
5
1889-1945
4
1942-
4
Civil War, 1861-1865
4
German occupation, 1940-1945
4
1860-1940
3
1899-1974
3
1901-1971
3
1913-1994
3
1953-
3
1954 April 23-
3
1969-1974
3
1975-1979
3
2001-2009
3
17th century
2
1864-1949
2
1880-1968
2
1884-1951
2
1887-1976
2
1896-1976
2
1898-1989
2
1900 - 1999
2
1901-1985
2
1913-1980
2
1915-1959
2
1923-1990
2
1924-2014
2
1926-1967
2
1930-
2
1939-1975
2
1941-
2
1945-
2
1954 Apr. 23-
2
1960-
2
1961-
2
1975-
2
1982-1985
2
19th century
2
Civil War, 1936-1939
2
Middle Ages, 500-1500
2
Soviet occupation, 1979-1989
2
13th century
1
1412-1431
1
more ...