The bodies of four young Kataeb members were found on 6 December 1975, while Pierre Gemayel was in Damascus; Muslims seized at makeshift checkpoints by the port were killed in reprisal. Accounts place the bodies in the Metn (Hanf), near Tal al-Za'tar (Haugbolle) or outside the electricity company offices (Fisk). De Clerck and Malsagne blame Joseph Saadeh, whose son was among the four. Only Fisk puts Bashir Gemayel in Damascus and cites Phalangist officers saying he ordered the reprisal. The Muslim dead number about 200 (Hanf, Traboulsi, de Clerck and Malsagne) or several dozen (Picard); Fisk gives at least 300 Muslims, and probably as many Christians, in the reprisals.

Ménargues dates the resignation to March 1980, after repeated deadlock between Hoss and Sarkis over the army; Hoss stayed on as caretaker until Shafiq Wazzan's appointment in late October.

The invasion, called 'Operation Peace for Galilee', began on Sunday 6 June: Israeli commandos crossed the border at 1.30 a.m. to attack Beaufort castle (Ménargues), and up to 25,000 troops moved along the coast, through Tibnin and across the eastern sector (Fisk). The government declared a limited aim of a 40-kilometre zone, but Defence Minister Ariel Sharon and Chief of Staff Rafael Eitan kept advancing (Hanf). One overview in de Clerck and Malsagne and Picard's chronology give 5 June.

Israeli losses: de Clerck and Malsagne count 670 dead and nearly 3,000 wounded between June 1982 and June 1985 (and 721 dead and 3,890 wounded for the whole war); Traboulsi writes of some 500 dead. Israel kept a 'security zone' policed with Lahad's South Lebanon Army.