sentences:  2007 Lebanon conflict
  
  The 2007 Lebanon conflict began when fighting broke out between Fatah al-Islam, an Islamist militant organization, and the Lebanese Armed Forces (LAF) on May 20, 2007 in Nahr al-Bared, an UNRWA Palestinian refugee camp near Tripoli.It was the most severe internal fighting since Lebanon's 1975–90 civil war.