The agreement was signed on May 17, 1983 by William Drapper for the United States, David Kimche for Israel and Antoine Fattal for Lebanon. Lebanese President Amine Gemayel was recently elected by the Syrian Nationalist Social Party after the assassination of his brother, President-elect Bashir Gemayel, a long-time ally of Israel. Some Lebanese supported President Amin Gemayel and argued that his close relations with the United States could help establish peace and restore Lebanese sovereignty, which they saw threatened not only by the Israeli occupation, but also by the Syrian occupation. The agreement ended the state of war between Israel and Lebanon, which has been ongoing since the 1948 Arab-Israeli war, and provided for a gradual withdrawal of Israeli forces provided a “security zone” for the Lebanese army in southern Lebanon along the border area. It contained numerous clauses relating to security cooperation between Lebanon and Israel to prevent the Palestine Liberation Organization (PLO) and other groups from entering border areas.  As part of the agreement, UNRWA`s 16 official camps in Lebanon – home to 300,000 Palestinian refugees – have been removed from the strict jurisdiction of the Lebanese Army`s Second Office and placed under the authority of the Palestinian Armed Fighting Command.  Although the camps remained under Lebanese sovereignty, the new arrangements meant that after 1969 they became an important popular base of the guerrilla movement.  The agreement of 17 May 1983 was an agreement between Lebanon and Israel during the Lebanese civil war of 17 May 1983, after the invasion of Lebanon by Israel and the siege of Beirut in 1982. He called for the withdrawal of the Israeli army from Beirut and provided a framework for the establishment of normal bilateral relations between the two countries.
During its negotiations, Lebanon was under Israeli and Syrian military occupations. The Cairo Agreement or the Cairo Agreement was an agreement reached on 2 November 1969 during talks between Yasser Arafat and the commander of the Lebanese army, General Emile Bustani.  Egyptian President Gamal Abdel Nasser helped mediate the agreement.  Although the text of the agreement was never published, on 20 April 1970, an unofficial (but probably correct) text appeared in the Lebanese daily An-Nahar.  The agreement established principles under which the presence and activities of Palestinian guerrillas in southeastern Lebanon would be tolerated and regulated by the Lebanese authorities.   The agreement called on the Lebanese army to take Israeli positions. On 6 February 1984, under the weight of a growing civil war in Beirut, the Lebanese denominational government collapsed by rival sectarian factions and Lebanon was unable to abide by the agreement. The agreement was revoked by the Lebanese parliament, headed by the newly elected spokesman, Hussein el-Husseini, who replaced spokesman Kamel Asaad, who had supported the agreement.