20th century 57
1945-1975 38
1975- 30
1900-1999 21
1961-1975 20
Since 1975 18
1945- 11
1963-1969 9
1890-1969 6
1961 - 1975 6
19th century 6
1858-1945 4
1908-1973 4
1913-1994 4
1945-1989 4
1961-1963 4
1950- 3
21st century 3
Since 1945 3
Vietnam War, 1961-1975 3
1800-1999 2
1900 - 1999 2
1901-1963 2
1911-2013 2
1937- 2
1961-1970 2
1969- 2
1989- 2
939-1428 2
1648-1714 1
1700-1899 1
1759-1833 1
1787-1858 1
1787-1899 1
1791-1840 1
1800-1899 1
1858-1975 1
1858-1999 1
1867-1940 1
1872-1926 1
1888-1980 1
1892-1985 1
18th century 1
1900-2099 1
1901-1976 1
1902- 1
1902-1985 1
1912-1939 1
1913- 1
1917-1963 1
1920- 1
1922-2000 1
1923- 1
1926-1967 1
1930- 1
1932- 1
1941- 1
1941-1965 1
1942- 1
1943-1970 1
1946 February 9- 1
1948- 1
1949- 1
1953-1961 1
1953-1975 1
1954-1979 1
1960-1988 1
1961-1969 1
1963- 1
1969-1974 1
1975-1979 1
1978- 1
1979 1
1988-2002 1
1990 1
1991- 1
1993- 1
2000-2099 1
Bombardment, 1972 1
Civil War, 1970-1975 1
Geschichte 1
Geschichte 1010-1945 1
Geschichte 1848-1945 1
Geschichte 1850-1998 1
Geschichte 1961-1975 1
Geschichte 1972 1
Geschichte 1975-2000 1
Geschichte 1985-1995 1
Geschichte 618-1945 1
Geschichte 918-1910 1
Revolution, 1954-1962 1
Revolution, 1979 1
Since 1960 1
Song dynasty, 960-1279 1
To 1428 1
To 939 1
Unification, 1990 1
United States 1
Vietnam 1
approximately 1025-approximately 1055 1