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.

De Clerck and Malsagne date the start of fighting in central Beirut to the night of 17-18 September 1975; Hanf and Traboulsi hold the Kataeb responsible for shelling the old souks. A cease-fire and the setting-up of the National Dialogue Committee followed.

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 When a Syrian unit entered Nabatiyeh in January 1977, an Israeli protest got it withdrawn and the Palestinians kept the town.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

Resolution 425 was adopted with Resolution 426, which set up the force; the USSR abstained (de Clerck and Malsagne). UNIFIL later numbered about 6,000 soldiers, with France providing the largest first contingent (1,290 men).

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.