How did the 1982 Israeli invasion affect West Beirut and the Palestine Liberation Organization?

The 1982 Israeli invasion of Lebanon had a profound impact on both West Beirut and the Palestine Liberation Organization (PLO).

Following the invasion on June 6, 1982, Israeli forces advanced to the outskirts of Beirut and laid siege to the capital, specifically targeting West Beirut, where the majority of PLO guerrilla bases were located. This siege involved massive Israeli shelling, which resulted in the widespread destruction of the area.123

For the PLO, the invasion served as a direct attempt by Israel to destroy the organization and its operational bases. The military pressure and the subsequent siege forced the PLO into negotiations, which ultimately led to the evacuation of its militia and leadership from Beirut under the supervision of a multinational peacekeeping force. Following this withdrawal, the PLO relocated its headquarters to Tunis, Tunisia. The invasion also acted as a catalyst for the emergence of new militant groups in the region, most notably Hezbollah, which formed to resist the Israeli presence.3412