The Begin Plan concerning the settlement of Palestinians in Lebanon made some noise.
The Lebanese reacted with firmness and indignation to the conspiracy initiated by foreign countries. According to Salim El Hoss, "Every project expecting the settlement of Palestinians outside of their land is rejected." The President of the Republic also rejected any project stipulating the permanent settlement of Palestinians in Lebanon. "Our country should determine itself what it is able to offer. It is unfair to solve the Palestinian question by creating a Lebanese problem. We will make every effort to let our right prevail", he said.

A serious incident occurred in Fayadieh.
Lebanese Soldiers fought with elements of the Arab Strike Force. Shots were exchanged followed by heavy armaments shootings.

Israel invaded the South, after an operation executed by the Fedayin on March 11 at Tel Aviv.
25,000 men backed by the aviation, armored vehicles and artillery invaded, within 2 hours, a tenth of Lebanon and forced Palestinians to withdraw to the North of the Litani. A first estimate reported 700 deaths and 160,000 displaced persons. Refugees rushed to Beirut causing a serious social problem. Air raids bombarded Damour, Ouzaï, and Tyr.

The Security council adopted the 425 Resolution which stipulated the expedition of 4,000 blue helmets to confirm the withdrawal of the Israeli forces. They had also to assist the Lebanese government in the restoration of its authority in the region.

A dramatic event was reported in Zghorta. A chock commando killed Tony Frangieh, deputy and son of the President Sleiman Frangieh, his wife Véra and their daughter Jihane, at their home in Ehden. The murder of Tony Frangieh took place while the conflict between the Phalange Party and the Zghortiotes was at its peak.

President Sleiman Frangieh declared that no Phalangist member will stay alive in the North of Lebanon. The vendetta caused the death of tens of persons. Phalangist militiamen were forced to flee towards Batroun then Jbeil.

Ain El Remmaneh was savagely bombed. 22 persons died and tens were injured. Syrian forces arrested Commander Bechir Gemayel then set him free.

Achrafieh was bombed. 130 shells hit the Hôtel-Dieu hospital where 20 rooms were destroyed. At the same time, a huge fire ravaged the dock number 6 in the port.

Imam Moussa Sadr, a Shiite leader disappeared while visiting Libya. Libyans asserted that he left Tripoli for Rome. Sadr never arrived to Rome, and the Lebanese were worried.