Lebanon on the Brink: The Israel-Iran War and the Risk of State Collapse

by Ethan Brooks

The fragile equilibrium of the Lebanese state is fracturing under the weight of a regional war it cannot afford and a political deadlock it cannot break. Following the assassination of Iran’s Supreme Leader Ali Khamenei, Lebanon has been thrust into the center of a direct confrontation between Israel and Tehran, triggering a military escalation that threatens to precipitate Lebanon’s coming collapse.

On March 1, Naim Qassem, the leader of Hezbollah, pledged immediate retaliation for the killing of the Iranian leader. This commitment translated into a barrage of rockets and drones launched across the border into Israel, prompting the Israel Defense Forces (IDF) to respond with a campaign of widespread airstrikes. These strikes have not been limited to the southern border; they have reached deep into the Bekaa Valley—the nation’s primary agricultural heartland—and the southern suburbs of Beirut.

By tethering Lebanon’s security to the broader U.S.-Israeli strategy against Iran, Hezbollah has effectively turned the country into a primary battlefield. Although, the scale of the Israeli response suggests a goal beyond mere deterrence. On March 16, Israeli Defense Minister Israel Katz announced a “targeted ground operation” in southern Lebanon, a move he compared to the intensive campaign in Gaza, which threatens to permanently displace hundreds of thousands of Shiite civilians.

Military activity along the Lebanon-Israel border has intensified following regional escalations between Tehran and Tel Aviv.

A government under siege

This military crisis arrives as Lebanon attempts to crawl out of a decade of institutional failure. In February 2025, a new administration took office under President Joseph Aoun and Prime Minister Nawaf Salam. Eschewing the traditional sectarian spoils system, the Aoun-Salam government prioritized technocratic expertise in an attempt to implement critical financial and judicial reforms.

The new leadership inherited a catastrophe. The country is still reeling from a 2019 banking crisis that saw a 90 percent collapse in currency value and a sovereign debt default. This was compounded by the 2020 Beirut port explosion, which caused over $8 billion in damages and exposed systemic corruption within the state apparatus.

The current administration promised a reconstruction program to address an estimated $11 billion in losses from the 2023–2024 conflict and vowed to finally implement UN Resolution 1701, which calls for the disarmament of Hezbollah. However, the current war has effectively frozen these efforts. With more than a million people displaced—the vast majority of whom are Shiites—the government’s capacity to provide basic humanitarian relief is vanishing.

Timeline of Lebanon’s Cascading Crises (2019–2026)
Year Key Event Primary Impact
2019 Banking Crisis 90% currency devaluation; sovereign default
2020 Beirut Port Blast 200+ dead; $8 billion in infrastructure damage
2023-24 Israel-Hezbollah War Mass displacement; $11 billion in losses
2025 Aoun-Salam Govt Attempt at technocratic reform and disarmament
2026 Iran-Israel Front Targeted ground operations; risk of state collapse

The Litani River and the threat of annexation

The strategic focus of the current conflict is the Litani River. Israeli military preparations, including the call-up of 450,000 reservists and the bombing of key bridge crossings, suggest an intent to disconnect southern Lebanon from the rest of the country. This has fueled fears that Israel is not merely seeking a buffer zone, but a prolonged occupation or annexation of territory south of the Litani.

Hardline members of Prime Minister Benjamin Netanyahu’s government have been explicit about these ambitions. Finance Minister Bezalel Smotrich has called for the reduction of parts of south Lebanon and Beirut’s southern suburbs to rubble, proposing that the Litani River turn into the new border. Such a move would not only violate Lebanese sovereignty but would likely ignite a renewed cycle of armed resistance, echoing the conditions that gave rise to Hezbollah following the 1982 invasion.

The humanitarian fallout is already severe. The Israeli military has issued evacuation orders for over 100 towns and villages, encompassing roughly 10 percent of Lebanese territory. The intentional destruction of predominantly Shiite villages has led to a crisis of perpetual displacement, creating a demographic shift that could permanently alter the social fabric of the region.

Sectarian fractures and the risk of civil war

The military pressure is exacerbating internal Lebanese divisions. While the government in Beirut has taken historic steps to assert state control—including banning Hezbollah’s military activities on March 2 and expelling members of Iran’s Islamic Revolutionary Guard Corps (IRGC)—these moves have been met with fierce resistance.

Sectarian fractures and the risk of civil war

Hezbollah has launched a public campaign accusing Prime Minister Salam and his cabinet of treason. The group portrays the current war as an existential communal struggle, using the Israeli onslaught to rebuild domestic support and deflect criticism over the country’s economic ruin. This polarization is manifesting on the ground, where local authorities have begun vetting internally displaced persons for fear that they may be targets of Israeli intelligence.

There are further concerns regarding external interference. Reports indicate that the United States has encouraged Syria to act against Hezbollah in the Bekaa Valley, a move that risks heightening tensions between Sunni and Shiite populations within Lebanon. If the central state in Beirut cannot maintain a monopoly on force, the country risks sliding back into the chaos of a sectarian civil war.

The path to stability

Preventing a total collapse requires a diplomatic decoupling of Lebanon from the war between Iran, and Israel. For too long, Lebanon has served as a venue for regional rivalries, a dynamic that has consistently degraded its institutions and caused immense civilian suffering.

International actors, particularly the United States and European powers, face a critical choice. Connecting reconstruction funding strictly to Hezbollah’s immediate disarmament—while ignoring the require to strengthen the Lebanese army and state institutions—may inadvertently cripple the only government capable of offering a viable alternative to militia rule. A sovereign and strong central state is the only mechanism capable of undoing the damage of the last five decades.

The immediate checkpoint for stability will be the outcome of the Lebanese president’s call for direct negotiations with Israel. Whether the international community can rein in military expansionism and provide the humanitarian aid necessary to prevent a total societal breakdown remains the defining question for the region.

This represents a developing story. We invite readers to share their perspectives and updates in the comments section below.

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