Serving as Prime Minister from 1999-2001, Barak is a decorated military hero, most notably for his work as tank battalion commander during the Yom Kippur War. As Prime Minister, Barak ended the occupation of Southern Lebanon and resumed peace negotiations with the Palestinians at the failed 2000 Camp David Summit. He was defeated by Ariel Sharon as a result of the ensuing Second Intifada. He served as Defense Minister from 2007-2013.