1982: PLO attempted to murder Israeli ambassador in London, so Israel re-invaded Lebanon (‘Operation Peace for Galilee’), UN could not control; 1000s of Lebanese civilians killed (and PLO members)
Israel continued advance and surrounded Beirut, keeping city under constant shellfire for 2 months (from air, sea and land), killing 1000s of civilians to try dislodge Palestinians
US intervened to stop it, made agreement for PLO fighters to be evacuated and 14,000 PLO members left for other Arab states (Arafat moved his headquarters to Tunisia)
1985: Israelis withdrew to southern Lebanon (were they were routinely attacked) and eventually altogether, apart from a small “security zone” due to internal pressure
Defeat for Israel, there were protests (400,000-strong protest) after they allowed armed supporters of Christian President to massacre in Lebanese refugee camps
Throughout, Civil War continued, western journalists and relief workers were taken hostage by various groups as reprisals or to force concessions or prisoner release