1970:
- April 22: The first Earth Day is celebrated.
- April 30: President Nixon announces that U.S. soldiers and South Viatnamese troops have entered Cambodia.
- May 4: 4 Kent State students are killed by National Guardsmen during anti-war demonstrations.
- September 18: Janis Joplin and Jimi Hendrix are killed by drug overdose at age 27.
1971:
- May 1: Massive anti-war marches in Washington result in a record 13,400 arrests.
1972:
- February 21-29: President Nixon visits China, ending two decades of hostility.
- May 15: Presidential candidate George Wallace is paralyzed in an assassination attempt.
- May 22-29: Nixon becomes the first U.S. president to visit Moscow. The Strategic Arms Limitation Treaty (SALT) is signed.
- June 17: 5 men are arrested for breaking into the Democratic Headquarters into the Watergate building.
- November 7: President Richard Nixon and Vice President Spiro Agnew win re-election in a landslide victory over Senator George McGovern and his running mate, R. Sargent Shriver.
- December 7: Apollo 17, the last mission to the moon is launched.
1973:
- January 22: The Supreme Court's decision in the Roe vs. Wade case legalizes abortion.
- January 27: A cease-fire in Vietnam is announced.
- May 17: Senate hearings into Watergate open.
- October 6: Arab nation attack Israel to begin the Yom Kippur War. Arab oil producers later announce a ban on oil exports then double prices, triggering worldwide economic crisis.
- October 10: Vice President Spiro Agnew pleads no contest to charges of tax evasion and resigns.
1974:
- February 4: Patty Hearst is kidnapped.
- February 8: "Good Times" debutes on CBS.
