Here's a timeline to help you.
Jan 20, 1945- FDR elected for his 4th term
Jun 25, 1950- N. Korea invades S. Korea, starting the Korean war
Sep 23, 1957- Eisenhower sends troops to escort the 'Little Rock Nine' to high school
Nov 8, 1960- JFK elected
Aug 28, 1963- MLK "I have a dream" speech
Oct 2, 1967- Thurgood Marshall becomes the 1st black Supreme Court Justice
Jul 1, 1971- 26th ammendment passed- voting age 18 years
Apr 30, 1975- Vietnam war ends
Mar 21, 1980- U.S boycotts the Soviet Olympics
Sep 21, 1981- Sandra O'connor first female Supreme Court Justice
Apr 29, 1992- LA riots due to court case not guilty
Jul 27, 1996- Centennial Olympic Park bombing
Apr 20, 1999- Columbine shooting