Plans for an Israeli invasion of Lebanon to remove the PLO were in place as early as the first southern incursion in March 1978. Defense Minister
Ariel Sharon said preparations for the attack had been underway "since he took office" in August 1981.
Prime Minister Begin postponed the invasion in February and again in April, waiting for the
Sinai withdrawal to be finalized. A ceasefire agreement between Israel and the PLO in July 1981 was effective, but Sharon and Chief of Staff
Rafael Eitan required backing from the leaders of northern settlements. Sharon outlined three objectives for the war: to crush the PLO, expel the
Syrians from Lebanon, and establish a strong central Lebanese government that Israel could pursue a peace deal with. Philip Habib, a seasoned American diplomat, played a crucial role in brokering the delicate negotiations that led to the PLO's withdrawal from Lebanon in 1982. Appointed as U.S. Special Envoy to the Middle East by President
Ronald Reagan, Habib mediated between several hostile parties, including the PLO, Israel, the Lebanese government, and Syria, to secure a peaceful resolution to the siege of Beirut and the wider conflict. Habib's engagement with the PLO, particularly through indirect negotiations with its leader Yasser Arafat, was a sensitive and complex process. The PLO had entrenched itself in Lebanon since 1971 and, by 1982, had over 10,000 fighters stationed in the country, particularly in and around West Beirut. As Israeli forces surrounded the city in June 1982, a humanitarian crisis loomed for both the Lebanese civilian population and the Palestinian refugees living in the area. The Israeli bombardment of Beirut, aimed at pressuring the PLO into surrendering, led to high civilian casualties, creating international outrage and mounting pressure for a negotiated settlement. == Negotiations ==