Era
20th century
6
1945-
4
19th century
2
19th century --
2
20th century --
2
21st century
2
1945-1964
1
1945-1991
1
1976-
1
1977-1981
1
1981-
1
1992-
1
19th century. --
1
20th century. --
1
Civil War, 1861-1865
1
Civil War, 1861-1865 --
1
Japanese occupation, 1942-1945
1
Midieval, 500-1500 --
1
Soviet occupation, 1979-1989
1