1982 Lebanon War

Overview

The 1982 Lebanon War began when Israel sent the Israel Defense Forces into Lebanon in June 1982. The campaign, named Operation Peace for Galilee, followed years of attacks on Israel launched by the PLO from Lebanese territory. Its declared mission was to remove the rocket threat to communities in northern Israel. Israeli forces advanced through southern Lebanon and reached the outskirts of Beirut, where a siege led to the departure of Yasser Arafat and thousands of PLO members. The operation unfolded within the wider Lebanese Civil War, whose rival militias, foreign forces, and competing political projects shaped both the fighting and its aftermath.

Prime Minister Menachem Begin authorized the campaign against the PLO’s forces in Lebanon. Defense Minister Ariel Sharon directed an advance that exceeded the initial objective of reaching roughly forty kilometers into Lebanon. Israeli troops pushed toward Beirut, and the campaign acquired a political aim alongside its immediate military one: Israel sought a Lebanese administration headed by Bachir Gemayel, commander of the Lebanese Forces. The PLO lost its Beirut base, but it survived as an organization. Gemayel’s murder and the continued divisions within Lebanon defeated hopes that military success would produce a lasting political settlement favorable to Israel.

The war’s consequences extended far beyond the siege. Lebanese Phalangist militiamen murdered civilians in the Sabra and Shatila camps near Beirut in September 1982 after Israeli troops permitted the militia to enter. An Israeli government commission found Sharon indirectly responsible for failing to address the danger of bloodshed; he resigned as defense minister in 1983. Israel later withdrew from positions deeper in Lebanon, maintaining a security zone near its northern border until 2000. During those years, Hezbollah, a terrorist organization established with assistance from Iran’s ruling regime and Syria, became a major enemy of Israel.

Background

Before 1982, the PLO had spent about a decade launching attacks on Israel from Lebanon. It had developed extensive armed infrastructure there and become a major military and political force within a country already fractured by civil war. Its position amounted to a state within a state: armed units, weapons stores, and political authority operated alongside, and often beyond, Lebanese state institutions. The earlier 1978 South Lebanon conflict had demonstrated the recurring danger along Israel’s northern frontier without ending the PLO’s ability to operate from Lebanon. Rocket and artillery fire remained a direct concern for communities in the Galilee.

Lebanon’s civil war also made the PLO’s presence inseparable from struggles among Lebanese factions. Christian militias, including the Phalangists who dominated the Lebanese Forces, fought other armed groups for territory and political power. Syrian forces operated in Lebanon, while Israel maintained ties with Lebanese Christian leaders and forces in the south. Any Israeli attempt to suppress PLO positions therefore risked drawing the IDF into conflicts that extended beyond the border threat. The campaign eventually did so: Israeli forces encountered Syrian troops, became involved in Beirut’s political struggle, and later faced disputes involving Druze and Christian militias.

On June 3, 1982, members of the Abu Nidal Organization attempted to assassinate Israel’s ambassador to Britain, Shlomo Argov. The group was distinct from the PLO, but the attack immediately preceded Israel’s military response in Lebanon. After Israeli strikes and PLO fire toward northern Israel, Begin authorized a ground campaign. On June 6, the IDF crossed into Lebanon under the name Operation Peace for Galilee. The immediate objective was to push armed forces and rockets away from Israel’s northern communities. The opening plan envisioned an advance of about forty kilometers, near the Litani River, rather than a campaign extending to the Lebanese capital.

Course of the war

Israeli forces moved north in June 1982 along several routes through southern Lebanon. Ground units fought PLO positions while Israeli air and naval forces supported the advance. Fighting developed around major coastal approaches and inland routes, and the IDF also confronted Syrian forces in Lebanon. The campaign rapidly exceeded its original geographic limit. Sharon ordered troops beyond the forty-kilometer objective, and Israeli units reached Beirut’s outskirts. That change transformed an operation framed around protection of the Galilee into a much larger effort to remove the PLO’s central leadership and influence Lebanon’s political future.

Israeli forces and their Lebanese allies encircled PLO-held areas of Beirut. The siege brought sustained fighting and negotiations over the departure of the PLO leadership and fighters. The United States worked on an evacuation arrangement intended to end the confrontation in the city. A multinational force arrived as the agreement was put into effect. On August 31, 1982, Arafat and thousands of PLO members left Beirut for Tunis and Syria; the evacuation concluded in early September. Fatah shifted its power base to Tunisia. The PLO’s departure removed its headquarters from Beirut, but expulsion did not destroy the organization or erase its wider networks.

Israel sought a Lebanese government led by Bachir Gemayel, whose Lebanese Forces were a major Christian military and political force. His election as president in August appeared to open a path toward an agreement with Israel. On September 14, 1982, a bomb killed Gemayel and 25 of his followers before he could take office. His murder damaged the prospect of the political settlement Israel had pursued. It also intensified the danger in Beirut, where armed factions had already committed grave violence against civilians during the civil war. Gemayel’s brother Amine became president, and Israel signed an agreement with his government on May 17, 1983. The agreement failed to establish the durable political order Israel had sought.

Israeli forces remained in Lebanon after the PLO evacuation. In September 1983, the IDF withdrew south of the Awali River, reducing its presence around Beirut while continuing to hold positions farther south. Fighting among Druze and Christian militias was among the disputes confronting Israeli forces during this period. From September 1982 until early 1985, successive deployments reflected Israel’s effort to convert battlefield gains into political and security gains. The Awali line, however, did not prevent attacks on the Galilee. Maintaining troops deep inside Lebanon imposed continuing costs without guaranteeing security for Israel’s northern communities.

Israel's conduct and the protection of civilians

The September 1982 massacre at Sabra and Shatila became the war’s most consequential atrocity and the subject of a major Israeli inquiry. Israeli troops allowed Lebanese Christian Phalangist militiamen into the camps near Beirut to search for armed PLO cells. An Israeli military order assigned the search and clearing operation to the Phalangists or the Lebanese Army. From September 16 through September 18, a Phalangist unit of the Lebanese Forces murdered camp residents. The killers were Lebanese militiamen, not Israeli soldiers. That distinction does not remove the responsibility examined by Israel’s inquiry: Israeli decision-makers had permitted the militia’s entry and failed to act adequately against the foreseeable danger to civilians.

Estimates of the number killed differ. Lebanese police counted 460 deaths, while Israeli intelligence estimated between 700 and 800. The range reflects different counts of the same atrocity and should not be collapsed into a single precise figure. The massacre followed Gemayel’s assassination, which had inflamed Phalangist anger, but his murder did not justify violence against civilians. The killings occurred within a Lebanese civil war marked by repeated attacks on noncombatants and by armed groups operating in and around residential areas. Responsibility for murdering Sabra and Shatila residents rests with the Phalangist perpetrators.

The Israeli government established the Kahan Commission to investigate the massacre. Its inquiry held 60 sessions and heard 58 witnesses. The commission confined its findings to the atrocities of September 16–18 and events directly connected to them, rather than assessing the entire Lebanon campaign. It found that the Phalangists carried out the killings and that Israeli authorities bore indirect responsibility. It faulted Sharon for approving their entry without adequately considering the risk of bloodshed or taking sufficient steps to prevent it. The findings led Sharon to resign as defense minister in 1983, although he remained in the cabinet for a time. The commission’s public investigation and its consequences became central to Israel’s domestic reckoning with the war.

Civilians elsewhere in Lebanon also faced the effects of military operations and the collapse of local authority. The United Nations Interim Force in Lebanon, or UNIFIL, remained behind Israeli lines for roughly three years after the June 1982 entry. Its work in that period focused where possible on protection and humanitarian assistance for local residents. Beirut’s siege, fighting among militias, and the continued presence of multiple armed forces made civilian safety a continuing concern. The protection of civilians was therefore both an immediate military obligation and a question in the political debate over how long Israeli forces should remain in Lebanon.

Terrorist tactics and propaganda

The PLO’s armed presence in Lebanon was the central target of Operation Peace for Galilee. Its attacks on Israel, including fire directed toward the Galilee, supplied the campaign’s immediate security rationale. Within Lebanon, PLO forces maintained positions and weapons infrastructure amid a densely populated and politically fragmented civil-war landscape. Fighting around those positions exposed civilians to danger and complicated efforts to distinguish military targets from nearby homes and institutions. Israeli operations to remove the threat also produced intense scrutiny of the means used during the advance and siege.

Public argument over the war was fierce inside Israel and abroad. Reports and images from Beirut shaped international views of the campaign, while claims about the location of PLO positions became part of disputes over Israeli attacks. After Sabra and Shatila, Time magazine accused Sharon of encouraging the massacre and illustrated its accusation with a Jewish star dripping blood. Sharon sued for libel and won a symbolic judgment. That dispute was separate from the Kahan Commission’s finding, which concerned his indirect responsibility for failing to anticipate and prevent Phalangist violence. Treating the magazine’s accusation, the commission’s conclusion, and the Phalangists’ direct acts as interchangeable would obscure what each established.

The security threat also changed after the PLO leadership’s removal from Beirut. In 1982, Iran’s ruling regime deployed Revolutionary Guard and regular army personnel toward the Lebanon–Syria border. With Syrian assistance, Iran helped establish the movement that became Hezbollah. Members of the Amal Movement, including Hassan Nasrallah, defected after Israel’s entry into Lebanon and helped form the new organization. Iranian Revolutionary Guard fighters arrived later in 1982 to aid its development. Hezbollah grew into a terrorist enemy that attacked Israeli forces and threatened northern Israel, demonstrating that removal of the PLO’s Beirut headquarters had not ended violence from Lebanon.

Outcome

The campaign achieved a major immediate military and political result: the PLO leadership and thousands of its members left Beirut, and Fatah established its new power base in Tunisia. Operation Peace for Galilee also removed the immediate rocket threat that had driven the initial advance into southern Lebanon. Those results were narrower than the ambitions the campaign acquired as Israeli forces moved toward Beirut. The PLO survived exile, and the attempt to establish a favorable Lebanese political order did not succeed. Gemayel’s murder, continued factional conflict, and the failure of the May 1983 agreement prevented Israel from turning the siege’s outcome into a stable settlement.

The costs persisted after the opening campaign. Approximately 540 Israeli soldiers were killed from June through September 1982. A verified estimate counts another 675 killed during the following 18 years of Israeli operations and deployment connected to Lebanon. The figures distinguish the first months of war from the long period that followed. Continued attacks on Israeli forces and northern communities also undercut the idea that holding positions deep inside Lebanon would by itself protect the Galilee. As Israel reduced its presence, Hezbollah became a growing border threat and a more dangerous terrorist enemy than the one Israeli planners had expected to face after the PLO’s removal.

Aftermath and legacy

On January 14, 1985, Israel decided to redeploy the IDF toward the international border while maintaining a security zone along the Lebanese frontier. During 1985, Israeli forces moved into that southern zone. The IDF and the South Lebanon Army subsequently fought Hezbollah there. Israel’s deployment had thus narrowed from the approaches to Beirut to a border-focused position, but armed conflict continued. UNIFIL’s work remained constrained by the location of Israeli and allied forces even as it provided protection and humanitarian assistance where possible.

In May 2000, the IDF withdrew from Lebanon’s security zone to the international border north of the Galilee. The withdrawal ended an eighteen-year Israeli military presence that had begun with the 1982 advance, while leaving Hezbollah established as an armed force in Lebanon. The war’s legacy includes both the expulsion of the PLO leadership from Beirut and the failure to secure a lasting political transformation in Lebanon. It also includes the Sabra and Shatila massacre, Israel’s official investigation of indirect responsibility, and a long debate within Israel over the purposes and costs of military intervention beyond the original objective.

Later Israeli campaigns were often measured against the scale and burden of 1982. The emergency call-up of more than 20,000 reservists for Operation Defensive Shield in 2002 was Israel’s largest since the Lebanon war. A battle that killed 13 IDF soldiers that April was described as the army’s deadliest day since that war. Before the war that began in October 2023, Israel had not kept reservists called up for more than sixty days since 1982. These comparisons reflect the campaign’s lasting place in Israeli military and political memory: an operation launched to defend northern communities that removed the PLO from Beirut, expanded into a struggle over Lebanon’s future, and led to a prolonged confrontation along the border.