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.

Dates differ between historians: 16 January (Ménargues), 18 January (de Clerck and Malsagne; consistent with Fisk), 19 January (Hanf), 20 or 22 January (Traboulsi). Maslakh, next door, fell at the same time. Most of the district's people were Shi'is, living alongside Palestinians, Kurds and Armenian Lebanese. Haugbolle estimates 150-500 dead, de Clerck and Malsagne 600-1,000; some 30,000 people were driven out to West Beirut and the southern suburbs.

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.

Barely a tenth of American and British residents accepted the evacuation, Fisk writes. The British went by road, the PLO escorting them through West Beirut and a Libyan officer on to the Syrian lines; a day later a US landing craft took evacuees off from a PLO-guarded bathing club on the Corniche.

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 When a Syrian unit entered Nabatiyeh in January 1977, an Israeli protest got it withdrawn and the Palestinians kept the town.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.

De Clerck and Malsagne and Picard agree that Haddad declared his 'State of Free Lebanon' at Marjayoun on 18 April 1979, in reaction to the army being sent towards the UNIFIL area under the March 1979 defence law; de Clerck and Malsagne put its size at 250 square kilometres and call it entirely reliant on Israel. Hanf has Haddad's troops stopping the battalion; de Clerck and Malsagne and Picard, Israeli aircraft bombing it; Fisk, Israel letting its militia shell it. Traboulsi dates Haddad's break to his Army of Free Lebanon of June 1976, Ménargues to a secession at the end of 1977. Hanf adds that once Haddad had lost his rank and been dismissed in disgrace, Israel paid his men.

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.