In a heated sitting of parliament Rashid al-Solh resigned, blaming the Kataeb for the fighting. His refusal to deploy the army had led the Kataeb ministers to leave the cabinet, and other Christian ministers had followed them.

De Clerck and Malsagne record that the besiegers executed some twenty Damour residents on this day, a first massacre a week after the siege began on 9 January. Whether these are the deaths reported 'at the entry of Damour' is not established.

De Clerck and Malsagne note that Edouard Saab was Le Monde's correspondent too; a sniper shot him dead while he crossed the demarcation line.

Fisk reports that the bodies of Ambassador Francis Meloy, his economic counsellor Robert Waring and their Lebanese driver, abducted near the Museum crossing, were found that evening at Ramlet al-Baida, and that Arafat, once sure of the three Palestinians responsible, sent them to Tyre. De Clerck and Malsagne judge that the murders ended American efforts at a settlement through the Lebanese parties.

Hanf has the Syrian army moving again only once Tal al-Za'tar had fallen, increasing pressure on the encircled Palestinian and leftist forces in the Upper Metn; these were expelled at the end of September.

Ratified by an Arab summit in Cairo on 25 October, the Riyadh decisions required all parties to surrender heavy weapons and the Palestinians to return to the zones granted by the 1969 Cairo Agreement, and created a 30,000-man Arab Deterrent Force under President Sarkis, its largest contingent by far, 25,000-27,000 men, being the Syrian troops already in Lebanon. Saudi Arabia had sent the invitations on 15 October; the leaders of Saudi Arabia, Kuwait, Egypt, Syria and Lebanon met the PLO chairman in Riyadh on 16, 17 or 18 October, depending on the historian. The cease-fire's start is dated 16 October (Hanf), 21 October (Traboulsi) or 15 November (de Clerck and Malsagne).

Later estimates for the 'two-year war' are below the figures quoted here. Published death tolls, de Clerck and Malsagne note, run from 15,000 to 40,000, and the displaced numbered at least 200,000. In The Times of 16 November 1976 Fisk reported almost 40,000 dead.

Jumblatt was ambushed near a Syrian checkpoint of the Arab Deterrent Force; Fisk places it on the mountain road near Baaqlin. Most historians give 16 March 1977 (Traboulsi, de Clerck and Malsagne, the Confluences authors, and Hanf on one page); Hanf elsewhere and Ménargues give 17 March, which Ménargues ties to the burial. His son Walid took over, and Christians were killed in reprisal in Chouf villages. Hanf writes that most politicians, Muslims above all, took the murder as a warning against defying Syria openly, and that Jumblatt had attacked the Syrian presence in speech and print, in Lebanon and abroad.

Hanf writes that the Lebanese Front was left with an enclave of roughly a tenth of Lebanon once Syrian troops had moved into the northern Christian mountains, Koura, Batroun and the coast as far as the Madfoun bridge. Frangieh gave Kataeb members in the north until the month's end to give up their weapons and quit the party, or else leave.

Bashir Gemayel's men fought a bloody battle with army units sent, at Pierre Gemayel's and Camille Chamoun's request, to separate the Kataeb and National Liberal militias, at war since 12 May. De Clerck and Malsagne call it the first serious armed clash between the army and a Lebanese militia, dating it once to 14 June and once to 18 June.

Hanf sees the Iran–Iraq war of September 1980 as already being fought earlier in Beirut's suburbs: Amal and the Iraqi-backed Arab Liberation Front clashed there despite repeated ceasefires, and the fighting spread south, where a dozen villages were contested until mid-1982. De Clerck and Malsagne list the Iraqi Baath among Amal's adversaries.

Fisk: after shells killed two Nigerian UNIFIL soldiers in March 1981, the force commander, General William Callaghan, blamed Israeli gunners rather than Haddad's militia.

Ménargues counts six bridges over the Awali and Litani destroyed in the raids. The Palestinians replied the same day with some 2,000 shells and rockets on Nahariya and Kiryat Shmona.

The raid targeted PLO offices in the Fakhani district of West Beirut. Tolls differ: Ménargues gives 191 dead and over 730 wounded; Fisk and Picard about 300 dead; Hanf hundreds killed and over a thousand hurt, chiefly civilians.

Ménargues places the attack at 9 a.m. in a Hamra side street: four gunmen fired on Hannouche's Range Rover, killing him, his daughter May (9), his son Alain (7) and two bodyguards. His armed entry into Zahleh under Syrian protection on 20 December 1980 had started the Zahleh crisis.