The day began with shootings near the church in Ain al-Rummaneh, where Pierre Gemayel was attending a consecration; his bodyguard Joseph Bou Assi was killed. In the early afternoon Kataeb militiamen fired on a bus returning to Tal al-Za'tar from a rally of the Arab Liberation Front. Most historians count 27 dead (Hanf, Fisk, de Clerck and Malsagne: 27 of 35 passengers); Traboulsi gives 21 and Ménargues 31. According to de Clerck and Malsagne the bus carried Palestinians and Lebanese in equal numbers, all men. Fighting spread that evening across the suburbs of Beirut.

The siege of Damour had begun on 9 January, before the fall of Karantina; the main massacre began on 20 January (Hanf, Ménargues, Fisk, de Clerck and Malsagne; Traboulsi gives 22 or 24 January). Jiyeh fell the same day. The attackers were mainly PLA, Saiqa and Fatah units, with Lebanese leftist parties. Estimates of the dead range from about 150 bodies found plus 200 missing (Fisk) and 300-584 (de Clerck and Malsagne) to about 900 (Ménargues); some 5,000 people fled by land and sea.

Ménargues has William Hawi shot by a Palestinian sniper in June 1976, at the end of the Tal al-Za'tar siege; Traboulsi places it during the siege. Bashir Gemayel succeeded him as Kataeb militia chief.

Israel, Hanf notes, would accept no Arab troops south of the 'red line', Syrian ones least of all. When a Syrian unit entered Nabatiyeh in January 1977, an Israeli protest got it withdrawn and the Palestinians kept the town.

Robert Fisk, who reported from the area, saw Israeli tanks on Lebanese soil near Ibl al-Saqi and Israeli shelling of Christian villages such as Rachaya al-Fukhar, where Palestinian guerrillas had dug in.

Historians date the Ehden killings to 13 June (de Clerck and Malsagne) or 14 June (Hanf). A unit of some 200 men (Traboulsi) led by Samir Geagea attacked the Frangieh residence; besides Tony Frangieh, his wife and their three-year-old daughter, about thirty relatives and supporters were killed. The Phalange presented the raid as retaliation for the killing of their local leader Jud al-Bayeh in early June; Bashir Gemayel denied ordering the killing of the family. The raid also turned on control of the Chekka cement works. Syrian troops then occupied Ehden and much of the north.

Hanf: early in 1980 Amal fought the Iraqi-backed Arab Liberation Front in Beirut's suburbs while Fatah tried to mediate, as relations between Shi'is and Palestinians grew worse; the fighting later reached the south.

In Ménargues's account Damascus rejected Takieddine Solh, finding him too lukewarm about Lebanese–Syrian friendship, and offered three names instead, Selim Hoss's among them.

De Clerck and Malsagne, drawing on Ronen Bergman, attribute to Ariel Sharon a series of car bombings from October 1981, carried out under the name 'Front for the Liberation of Lebanon from Foreigners' and aimed chiefly at Palestinians, to provoke retaliation that could justify an invasion. They list no individual attacks, so this bombing cannot be matched to their account.

On 13 June Israeli forces reached Baabda and Yarze, seats of the presidency and the army command, and joined the Lebanese Forces' lines (Hanf, Ménargues); Fisk dates the arrival of Sharon and his forward troops at Baabda to just before midnight.

Ménargues and Fisk date the decision to form the committee to 14 June; Traboulsi has it convening on 20 June. Philip Habib attended its sessions of 22 and 23 June. Its agenda, Traboulsi notes, dealt with the PLO's withdrawal, not the Israeli occupation; Jumblatt quit the committee and the cabinet rather than 'deal the final blow to the Palestinians', and Berri stopped taking part.

After the Israeli advance, Lebanese Forces militiamen set up checkpoints in the Chouf and Aley; clashes with Druze fighters followed and the Israelis often mediated (Hanf). De Clerck and Malsagne date the 'Mountain War' from summer 1982, the Lebanese Forces fighting first the SSNP's Druze and then the PSP.

On 8 November 1982 PSP men attacked a Christian funeral in Kfar Nabrakh, a mixed Chouf village, killing eleven, in reaction to a Lebanese Forces checkpoint set up nearby. Some twenty houses were burned and nine villagers abducted; their bodies were found in a well on 23 November. De Clerck and Malsagne call it the Mountain War's first massacre.