Israel–Hezbollah Conflict

The Israel–Hezbollah conflict escalated on 8 October 2023, when Hezbollah began firing rockets and other weapons at Israeli positions and communities from Lebanon. Hezbollah said the attacks supported Hamas after the 7 October assault on Israel and would continue until Israeli operations in Gaza ended. Israel responded with artillery and air strikes against Hezbollah targets, and civilians on both sides of the border were evacuated.

For months, the exchanges remained concentrated along the border but intensified through cross-border attacks, targeted killings and strikes deeper inside Lebanon and Israel. In September 2024, a wave of explosions involving communication devices, followed by air strikes and expanded operations, sharply escalated the conflict. Israeli forces killed Hezbollah leader Hassan Nasrallah and other senior commanders, and ground forces entered southern Lebanon.

The fighting caused deaths, injuries and extensive destruction, while tens of thousands of residents were displaced from border communities. A ceasefire arrangement brokered by the United States and France took effect in November 2024 and required Hezbollah and Israeli forces to withdraw from designated areas as the Lebanese army deployed south. The conflict's wider regional context, humanitarian consequences and compliance questions remained significant.

Background

Hezbollah is a Lebanese Shia organization founded during Israel's 1982 invasion and occupation of southern Lebanon. It developed political, social and military institutions and received support from Iran. The United States and several other governments designate Hezbollah, in whole or in part, as a terrorist organization. It fought Israel during the occupation, which ended with Israel's withdrawal in 2000, and fought the 2006 Lebanon War.

United Nations Security Council Resolution 1701 ended the 2006 war and called for the cessation of hostilities, deployment of the Lebanese Armed Forces and UNIFIL in southern Lebanon, and the disarmament of armed groups in the area. Hezbollah retained a substantial arsenal and continued to operate near the border. Israel conducted periodic strikes against Hezbollah weapons transfers and positions in Syria and Lebanon.

Hezbollah and Israel had avoided a full-scale war for years, though tensions periodically rose. Hezbollah supported the Syrian government in the Syrian Civil War, while Israel targeted Iranian and Hezbollah military infrastructure in Syria. The group also participated in Lebanese politics and retained independent armed capabilities, a status opposed by many Lebanese political actors.

The October 7 attacks on Israel by Hamas-led forces triggered the Gaza war. Hezbollah opened a front along the northern border the following day, saying it was acting in solidarity with Gaza. Israel ordered evacuations in communities near Lebanon and moved forces north. The attacks raised fears that the 2006 war would recur on a larger scale.

Events

Border exchanges and limited operations

Hezbollah launched rockets, anti-tank missiles and drones toward Israeli military positions and towns. Israel returned fire with artillery, aircraft and drones. Both sides reported targeting military infrastructure, but attacks also affected civilian areas. The United Nations Interim Force in Lebanon recorded repeated violations and urged restraint.

Israel targeted Hezbollah commanders and operational infrastructure, including weapons sites and launch positions. Hezbollah claimed attacks on Israeli military bases, radar systems and surveillance equipment. The group used increasingly sophisticated weapons, while Israel employed air defense systems and precision strikes. Each side sought to impose costs without immediately triggering an all-out war.

The exchanges displaced residents from northern Israel and southern Lebanon. Israeli communities near the border were largely evacuated, and tens of thousands of people relocated to hotels and temporary housing. In Lebanon, residents left border villages as strikes destroyed homes, farmland and public buildings. The long-term displacement placed pressure on local services and livelihoods.

Escalation in 2024

In July 2024, an attack in the Golan Heights killed children and injured others. Israel attributed the strike to Hezbollah, which denied responsibility. Israel responded by killing senior Hezbollah commander Fuad Shukr in Beirut. Hezbollah then launched a large rocket and drone barrage at Israel, while Israeli aircraft struck targets in Lebanon.

On 17 and 18 September, thousands of pagers and handheld radios used by Hezbollah members exploded across Lebanon and Syria. The blasts killed and wounded people, including civilians, and caused widespread fear. Israel did not publicly claim responsibility at the time, though later officials acknowledged the operation. The method and its effects prompted debate over whether the devices were lawful military targets and whether the attacks distinguished combatants from civilians.

Israel followed the explosions with intensive air strikes across Lebanon, targeting Hezbollah commanders, missile sites and weapons stores. The strikes killed senior leaders and displaced large numbers of civilians. On 27 September, an Israeli air strike in Beirut's southern suburbs killed Hezbollah secretary-general Hassan Nasrallah, along with other commanders. His death was a major blow to the organization's leadership.

Israel expanded its ground operations in southern Lebanon in early October. Israeli forces said they were targeting Hezbollah infrastructure and tunnels near the border to remove threats to northern Israeli communities. Hezbollah fought Israeli troops and continued to launch rockets. The ground campaign produced casualties and damage in villages and brought renewed fears of a prolonged occupation.

Ceasefire

The United States and France mediated a ceasefire agreement that took effect on 27 November 2024. It provided for an initial 60-day period during which Hezbollah would withdraw its armed presence north of the Litani River, Israeli forces would withdraw from Lebanon, and the Lebanese army would deploy in the south. The arrangement reaffirmed Resolution 1701 and established an international monitoring mechanism.

Israel said it reserved the right to act against imminent threats if the agreement was violated. Lebanese officials emphasized the state's responsibility for security in the south. Both parties accused the other of violations, and Israeli forces conducted strikes and retained positions past deadlines during negotiations over withdrawal. Hezbollah's future disarmament and the Lebanese army's capacity remained central questions.

The ceasefire reduced large-scale fighting and enabled some displaced residents to return, but many villages had been severely damaged. Reconstruction required funding and security guarantees. The Lebanese government and army faced pressure to assert authority in an area where Hezbollah had long maintained military infrastructure.

UNIFIL personnel remained deployed along the Blue Line, the boundary used by the United Nations to confirm Israel's withdrawal in 2000. Peacekeepers reported strikes and exchanges close to their positions and repeatedly urged both parties to avoid actions that endangered civilians and United Nations personnel. The mission's mandate did not give it authority to disarm Hezbollah by force.

The conflict renewed international attention to Security Council Resolution 1701 and its unimplemented provisions. Lebanese governments had repeatedly struggled to assert exclusive state authority over weapons and operations in the south. Israeli officials argued that the resolution had failed to prevent Hezbollah from building military infrastructure near the border. Lebanese officials called for full Israeli withdrawal and an end to violations of Lebanese airspace.

Impact and aftermath

The conflict killed civilians and combatants in Lebanon and Israel. Israeli residents were displaced from border towns, and Lebanese residents fled southern villages, the Bekaa Valley and Beirut suburbs during intensive strikes. Many families lost homes, businesses and agricultural land. Displacement disrupted education, health care and employment.

Israeli air strikes damaged roads, bridges, buildings, power infrastructure and agricultural areas in Lebanon. Hezbollah attacks damaged homes and infrastructure in northern Israel and caused fires. The scale of destruction was substantial, particularly in southern Lebanon and Beirut's southern suburbs. Reconstruction costs added to Lebanon's existing economic crisis.

The conflict weakened Hezbollah's senior leadership and military infrastructure. Nasrallah's death and the loss of commanders altered the group's internal structure and regional position. Iran remained a key supporter, while Hezbollah sought to maintain its role in Lebanese politics. Israel described its operations as a means of enabling northern residents to return safely.

Lebanon's state institutions faced a test of authority. The Lebanese Armed Forces deployed south under the ceasefire, but the government's ability to prevent rearmament or enforce disarmament remained uncertain. Political divisions and economic weakness constrained reconstruction and security reform.

Casualties and damage

Casualty figures changed over the course of the conflict and differed between official statements and independent reporting. Thousands were killed or injured in Lebanon, including Hezbollah fighters, Lebanese civilians and foreign nationals. Israel reported deaths among soldiers and civilians from rocket fire, drone attacks and ground combat. The loss of life included medical personnel and emergency responders.

Many villages in southern Lebanon sustained severe damage, and some residential districts in Beirut were struck. Israeli border communities experienced rocket damage and fires. Unexploded ordnance and damaged infrastructure posed risks after active fighting subsided. The agricultural sector suffered from fires and the loss of access to fields.

Estimates of Hezbollah's combatant losses were contested. Israel said it killed large numbers of fighters and destroyed significant quantities of weapons and tunnels. Hezbollah did not publish a comprehensive list during the fighting. Independent verification remained difficult because access to combat zones was restricted.

War crimes allegations

Human-rights groups and United Nations officials raised concerns about attacks that killed civilians and damage to civilian infrastructure. Israeli operations were criticized for their scale and effects in densely populated areas. Hezbollah was accused of launching rockets indiscriminately toward Israeli population centers and of operating among civilian communities. Both practices can violate international humanitarian law.

The explosions of communication devices caused mass injuries in public places, including among people not directly involved in combat. Investigators examined whether the devices were used by Hezbollah fighters and whether foreseeable civilian harm was excessive. The operation's secrecy and lack of public attribution at the time complicated independent legal analysis.

Investigations also considered the use of white phosphorus, attacks on medical facilities and the protection of journalists. Both sides denied or disputed allegations. International law requires distinction, proportionality and precautions in attack. Independent access and transparent investigations were necessary to establish responsibility.

Reactions

The United States and France pressed for a ceasefire and supported the Lebanese army's deployment. The United Nations called for respect for Resolution 1701 and the protection of civilians. European and Arab governments urged de-escalation and provided humanitarian assistance. Iran condemned Israeli operations and expressed support for Hezbollah.

Lebanese political leaders differed over Hezbollah's decision to open a front and the group's weapons. Some praised resistance to Israel, while others argued that unilateral military action endangered the country. The scale of destruction and displacement renewed debate over the state's authority and the costs of Hezbollah's independent arsenal.

In Israel, residents from northern communities demanded security guarantees and a safe return. Government officials said military operations were necessary to restore deterrence and remove Hezbollah forces from the border. Opposition politicians and families of displaced residents criticized the length of evacuations and pressed for a durable arrangement.

Rearmament of Hezbollah

Hezbollah's arsenal grew substantially after the 2006 war, with estimates of its rocket and missile inventory reaching tens of thousands. The group developed drones, precision-guided weapons and tunnel infrastructure. Israel viewed the buildup as a strategic threat and sought to disrupt transfers from Iran and Syria. Hezbollah described its weapons as a deterrent against Israeli attacks.

The ceasefire required the Lebanese state and UNIFIL to prevent unauthorized armed presence south of the Litani River. Implementation depended on monitoring, border security and cooperation among Lebanese institutions. Questions about Hezbollah's broader arsenal north of the river were not fully resolved by the agreement.

Rearmament concerns were linked to regional networks involving Iran and allied groups. The conflict damaged Hezbollah's capacity but did not eliminate its organization. The balance between deterrence, state sovereignty and the risk of renewed war remained central to Lebanon's future security.