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Chicago 7 convicted of crossing state lines
February 18, 1970 - Five members of the Chicago 7 are convicted of crossing state lines to incite riots during the 1968 Democratic Presidential Convention in Chicago. -
Four students from Kent State killed
May 4, 1970 - Four students from Kent State University in Ohio were killed and nine wounded by National Guardsmen during a protest against the Vietnam War spread into Cambodia -
Raid into Laos
February 8, 1971 - A forty-four day raid into Laos by South Vietnamese soldiers is begun with the aid of United States air and artillery. -
Voting age lowered
March 10, 1971 - The Senate approves a Constitutional Amendment, the 26th, that would lower the voting age from 21 to 18. House approval came on March 23. It was ratified by the states by June 30 and received certification by President Richard M. Nixon on July 5. -
Largest attacks by North Vietnam
March 30, 1972 - The largest attacks by North Vietnam troops across the demilitarized zone in four years prompts bombing raids to begin again by United States forces against Hanoi and Haiphong on April 15, ending a four year cessation of those raids. -
Watergate begins
June 17, 1972 - The Watergate crisis begins when four men are arrested for breaking into the Democratic National Committee headquarters in the Watergate office building in Washington, D.C. on the same day that Okinawa is returned from U.S. control back to Japan. -
Two Defendants in the Watergate break-in trial are convicted
Two defendants in the Watergate break-in trial are convicted. The remaining five defendants had pleaded guilty to the crime two weeks earlier. On April 30, the Watergate affair widens when four members of the Nixon administration; aides H.R. Haldeman, John D. Ehrlichman, John W. Dean, and Attorney General Richard Kleindienst resign under suspicion of obstructing justice. -
Impeachment hearings began
May 7, 1974 - Impeachment hearings are begun by the House Judiciary Committee against President Richard M. Nixon in the Watergate affair. On July 24, the United States Supreme Court rules that President Nixon must turn over the sixty-four tapes of White House conversations concerning the Watergate break-in. -
Nixon Resigns
August 9, 1974 - President Richard M. Nixon resigns the office of the presidency, avoiding the impeachment process and admitting his role in the Watergate affair. He was replaced by Vice President Gerald R. Ford, who, on September 8, 1974, pardoned Nixon for his role. Nixon was the first president to ever resign from office. -
Watergate cover up trials completed
January 1, 1975 - The Watergate cover up trials of Mitchell, Haldeman, and Ehrlichman are completed; all are found guilty of the charges.