April 1996: Lewinsky begins working at the Pentagon where she meets Linda Tripp (right), who secretly taped telephone conversations in which Lewinsky said she had an affair with Clinton. According to transcripts released by Newsweek magazine, Lewinsky tells Tripp: "I was brought up with lies all the time ... that's how you got along ... I have lied my entire life."
28 December 1997: Lewinsky reportedly visited the White House for the last time.
7 January 1998: Lewinsky denies a sexual relationship with Clinton in an affidavit for the Paula Jones sexual harassment case.
12 January: Tripp turns over to prosecutors 20 hours of surreptitiously taped telephone conversations with Lewinsky.
16 January: Attorney General Janet Reno (below) secretly grants independent counsel Kenneth Starr authority to investigate the Lewinsky relationship.
17 January: In a six-hour deposition for the Jones case, Clinton denies he had a sexual relationship with Lewinsky. The definition of sexual relations in the Paula Jones case: "... a person engages in `sexual relations' when the person knowingly engages in, or causes contact with the genitalia, anus, groin, breast, inner thigh or buttocks of any person with an intent to arouse or gratify the sexual desire of any person. `Contact' means intentional touching, either directly or through clothing." Clinton says in his testimony: "I have never had sexual relations with Monica Lewinsky. I've never had an affair with her."
17 January: Internet gossip columnist Matt Drudge (above) posts the Lewinsky sex allegations on the World Wide Web.
21 January: The Lewinsky allegations are published by major news media including The Washington Post, which reported that Starr is investigating the sex and perjury allegations.
26 January: Lewinsky's lawyer submits to Starr a proffer (formal offer outlining her testimony to the grand jury). Clinton says: "I'm going to say this again: I did not have sexual relations with that woman, Miss Lewinsky. I never told anyone to lie, not a single time."
27 January: Clinton's secretary Betty Currie testifies as first witness in Starr's probe of Lewinsky matter. Hillary Clinton appears on the NBC Today show to defend her husband. Asked what should happen if a President was found to have had an adulterous liaison in the White House and lied to cover it up, she says: "I think that if all that were proven true, I think that would be a very serious offence."
10-11 February: Lewinsky's mother, Marcia Lewis, (right) testi-fies for more than six hours to the grand jury.
5 March: Lewinsky's lawyer, William Ginsburg, argues before a federal judge that Starr's office had made and retracted an offer of immunity for Lewinsky in return for her testimony.
10 March: Former White House volunteer Kathleen Willey (right) gives testimony before the grand jury.
15 March: Willey appears on national television and alleges Clinton made a pass at her and groped her in a 1993 encounter at the White House.
1 April: Federal Judge Susan Webber Wright dismisses Jones' sexual harassment suit against Clinton.
29 April: News media disclose Federal Judge Norma Holloway Johnson's ruling that Lewinsky had no agreement with Starr that would give her immunity from prosecution.
15 May: Appeals court rejects Lewinsky's claim that she had an immunity deal with Starr's office.
2 June: Lewinsky fires Ginsburg and hires veteran Washington lawyers Jacob Stein and Plato Cacheris; talks resume with Starr's prosecutors for immunity deal.
17 July: Starr's office issues subpoena for Clinton's testimony.
17 July: Three secret service agents testify before the grand jury, marking the first time in US history such personnel have been forced to testify before a grand jury about their observations of a president's activities, while guarding him.
23 July: President Clinton's top bodyguard Larry Cockell (right) testifies before the grand jury.
28 July: Lewinsky gets deal for broad immunity from prosecution in exchange for her full testimony, as does her mother.
29 July: Clinton agrees to testify voluntarily to grand jury on 17 August; Starr's team withdraws subpoena.
31 July: Clinton says: "I am looking forward to the opportunity of testifying. I will do so completely and truthfully." Paula Jones (above) asks the appeals court in St Louis to reinstate her sexual harassment case against Clinton.
6 August: Lewinsky testifies to grand jury. Sources close to the case say she testified that she had sex with Clinton and they discussed keeping the affair quiet but he never explicitly told her to lie about it.