Era
20th century
7
1889-1945
5
1933-1945
5
1918-1933
4
Unification, 1990
2
1517-1648
1
16th century
1
17th century
1
1800-1933
1
1882-1962
1
1892-1940
1
1892-1975
1
1895-1942
1
18th century
1
1904-1944
1
1906-1992
1
1918-1945
1
1919-
1
1945-1990
1
1960-
1
1968-
1
1990-
1
19th century
1
Civil War, 1936-1939
1