In foreign policy, Clinton ordered U.S. military intervention in the Bosnian and Kosovo wars, eventually signing the Dayton Peace agreement. He also called for the expansion of NATO in Eastern Europe and many former Warsaw Pact members joined NATO during his presidency. Clinton's foreign policy in the Middle East saw him sign the Iraq Liberation Act which gave aid to groups against Saddam Hussein. He also participated in the Oslo I Accord and Camp David Summit to advance the Israeli–Palestinian peace process, and assisted the Northern Ireland peace process.
Clinton's second term was dominated by the Monica Lewinsky scandal, which began in 1996, when he had a sexual relationship with 22-year-old Monica Lewinsky, an intern at the White House. In January 1998, news of the affair made tabloid headlines.[1] This scandal escalated throughout the year, culminating on December 19 when Clinton was impeached by the House of Representatives, becoming the second  U.S. president—the first since Andrew Johnson—to be impeached. The two impeachment articles that the House passed were centered around him using the powers of the presidency to obstruct the investigation and lying under oath. In 1999, Clinton's impeachment trial began in the Senate. 