1972 Watergate scandal: five White House operatives are arrested for burglarizing the offices of the Democratic National Committee, in an attempt by some members of the Republican party to illegally wiretap the opposition.
1972 Watergate Scandal: U.S. President Richard M. Nixon and White House Chief of Staff H. R. Haldeman are taped talking about using the Central Intelligence Agency to obstruct the Federal Bureau of Investigation's investigation into the Watergate break-ins.
1972 Watergate Scandal: U.S. President Richard M. Nixon and White House Chief of Staff H. R. Haldeman are taped talking about using the Central Intelligence Agency to obstruct the Federal Bureau of Investigation's investigation into the Watergate break-ins.
1972 The ''Washington Post'' reports that White House Chief of Staff H.R. Haldeman is the fifth person to control a secret cash fund designed to finance illegal political sabotage and espionage during the 1972 presidential election campaign (see also Watergate scandal).
1973 Watergate scandal: The trial of seven men accused of illegal entry into Democratic Party headquarters at Watergate begins.
1973 Watergate Scandal: U.S. President Richard Nixon announces that top White House aids H.R. Haldeman, John Ehrlichman and others have resigned.
1973 Watergate scandal: Televised hearings begin in the United States Senate.
1973 Alexander Butterfield reveals the existence of the Nixon tapes to the special Senate committee investigating the Watergate break in.
1973 Watergate Scandal: former White House aide Alexander P. Butterfield informs the United States Senate that President Richard Nixon had secretly recorded potentially incriminating conversations.
1973 "Saturday Night Massacre": President Richard Nixon fires U.S. Attorney General Elliot Richardson and Deputy Attorney General William Ruckelshaus after they refuse to fire Watergate special prosecutor Archibald Cox, who is finally fired by Robert Bork.
1973 The Watergate Scandal: US President Richard M. Nixon agrees to turn over subpoenaed audio tapes of his Oval Office conversations.
1973 Watergate Scandal: Leon Jaworski is appointed as the new Watergate Special Prosecutor.
1973 Watergate scandal: In Orlando, Florida, US President Richard Nixon tells 400 Associated Press managing editors "I am not a crook".
1974 United States President Richard Nixon refuses to hand over materials subpoenaed by the Senate Watergate Committee.
1974 Watergate scandal: Seven are indicted for their role in the Watergate break-in and charged with conspiracy to obstruct justice.
1974 Watergate Scandal: President Richard Nixon announces the release of edited transcripts of White House tape recordings related to the scandal.
1974 Watergate Scandal: The United States House of Representatives Judiciary Committee opens formal and public impeachment hearings against President Richard Nixon.
1974 Watergate scandal: the United States Supreme Court unanimously ruled that President Richard Nixon did not have the authority to withhold subpoenaed White House tapes and they order him to surrender the tapes to the Watergate special prosecutor.
1974 Watergate Scandal: the House of Representatives Judiciary Committee votes 27 to 11 to recommend the first article of impeachment (for obstruction of justice) against President Richard Nixon.
1974 Watergate Scandal: U.S. President Richard M. Nixon releases subpoenaed White House recordings after being ordered to do so by the United States Supreme Court.
1974 Watergate scandal: U.S. President Richard Nixon announces his resignation, effective the next day.
1974 As a direct result of the Watergate scandal, Richard Nixon becomes the first President of the United States to resign from office. His Vice President, Gerald Ford, becomes president.
1974 Watergate Scandal: US President Gerald Ford pardons former President Richard Nixon for any crimes Nixon may have committed while in office.
1975 Watergate scandal: Former United States Attorney General John N. Mitchell and former White House aides H. R. Haldeman and John Ehrlichman are sentenced to prison.
1978 Former United States President Nixon aide John D. Ehrlichman is released from an Arizona prison after serving 18 months for Watergate-related crimes.