Israel-Lebanon Conflict 2026: Iran War & Regional Escalation

The latest installment of the MERIP Roundtable, focusing on the ongoing war in Iran, highlights the escalating conflict in Lebanon following the assassination of Iran’s Supreme Leader, Ayatollah Ali Khamenei, on February 28, 2026. This third part of the series, instigated by joint U.S.-Israeli actions, examines the regional reverberations, particularly the renewed hostilities between Israel and Hezbollah. The assassination, confirmed by both Iranian and U.S. Officials, has triggered a volatile response, with Hezbollah launching missiles into Israel – its first offensive move since a 2024 ceasefire – and Israel subsequently escalating its military actions within Lebanon.

Lebanon as a New Front

The current crisis represents a significant expansion of the conflict, moving beyond direct confrontations between Iran and Israel to encompass Lebanon more fully. Israel has issued mass evacuation warnings for areas south of the Litani River, as well as districts within Beirut (Dahiyeh) and the Bekaa Valley. These warnings have been followed by Israeli incursions, including a commando raid through Syria into the Bekaa Valley, and sustained missile and drone attacks. The scale of displacement is substantial, with over one million Lebanese citizens – roughly a quarter of the country’s population – now internally displaced. This situation raises critical questions about Lebanon’s national sovereignty, its capacity for self-defense, and the broader dynamics of resistance to Israeli aggression in the region.

The MERIP Roundtable discussion, recorded on March 23, 2026, featured insights from Rima Majed, an associate professor of sociology at the American University of Beirut, and Ali Musleh, an assistant professor of anthropology at the University of California, Davis. Both are members of MERIP’s editorial committee, bringing expertise on Lebanese sectarianism, social movements, and the impact of modern warfare on Palestinian life. Their analysis centers on the challenges facing both Lebanese and Palestinian resistance movements in the face of Israel’s overwhelming military and technological superiority.

Historical Context: A Long-Running Conflict

The current escalation is rooted in a long history of conflict between Israel and both Iran and Hezbollah. The relationship between Israel and Lebanon has been fraught with tension since the Lebanese Civil War (1975-1990), during which Israel intervened multiple times. Hezbollah, formed in the early 1980s with Iranian support, emerged as a powerful force in Lebanese politics and a key actor in the resistance against Israeli occupation. The 2006 Lebanon War, sparked by Hezbollah’s capture of two Israeli soldiers, resulted in widespread destruction and a significant loss of life. While Israel withdrew from Lebanon in 2000, the border region has remained a flashpoint for conflict. Hezbollah: The Political Economy of the Party of God by Joseph Daher provides a detailed analysis of the group’s origins and evolution.

The assassination of Ali Khamenei, the second Supreme Leader of Iran, marks a significant turning point. Khamenei had held power since 1989, navigating Iran through periods of international isolation and internal unrest. His death, as reported by NPR, was confirmed by President Trump, who, alongside Israeli leaders, called for regime change in Iran. This direct U.S. Involvement underscores the broader geopolitical context of the conflict, which extends beyond regional dynamics to encompass the strategic interests of major global powers. The assassination itself occurred as part of a wider joint operation by the United States and Israel, leveraging U.S. Intelligence assets.

Actors and Stakes: A Complex Web of Interests

The primary actors involved in this conflict are numerous and their interests are often intertwined. Israel views Hezbollah as a significant threat to its security, citing the group’s extensive arsenal of rockets and its close ties to Iran. Israel’s stated objective is to neutralize Hezbollah’s military capabilities and prevent it from launching future attacks. Iran, for its part, supports Hezbollah as a key ally in its regional strategy, viewing the group as a deterrent against Israeli and U.S. Aggression. The United States shares Israel’s concerns about Hezbollah and Iran, and has historically provided significant military and financial assistance to Israel. The Lebanese government finds itself caught in the middle, struggling to maintain its neutrality and protect its citizens amidst the escalating violence.

Beyond these core actors, regional powers such as Syria and Qatar likewise play important roles. Syria serves as a transit route for arms and personnel between Iran and Hezbollah, while Qatar has historically mediated between the two sides. The conflict also has implications for the broader regional balance of power, potentially drawing in other actors and exacerbating existing tensions. The killing of Khamenei has sparked anger across Shiite communities worldwide, as reported by the Associated Press, raising fears of wider unrest and potential retaliatory attacks.

The Impact on Lebanon: Sovereignty and Displacement

Lebanon is particularly vulnerable in this conflict due to its fragile political system, its economic crisis, and its history of sectarian divisions. The country is still grappling with the aftermath of the 2020 Beirut port explosion, which caused widespread devastation and exacerbated existing economic woes. The current conflict is further straining Lebanon’s resources and infrastructure, and is exacerbating the humanitarian crisis. The mass displacement of civilians is placing a significant burden on the country’s already overstretched social services. “Dispatch from South Lebanon–Life as Resistance at the Complete of the World,” published by the Middle East Report, offers a ground-level perspective on the challenges facing Lebanese communities.

The renewed assault also raises fundamental questions about Lebanon’s national sovereignty and its ability to defend itself. The country’s political system is deeply divided along sectarian lines, making it difficult to forge a unified response to external threats. Hezbollah’s presence within Lebanon complicates the situation further, as the group operates with a degree of autonomy and possesses a significant military force. The Israeli attacks are testing the limits of Lebanon’s resilience and its capacity to withstand external pressure.

Global Implications and Economic Repercussions

The conflict in Iran and Lebanon has far-reaching implications for the global economy and international security. The disruption of oil supplies from the Middle East could lead to a spike in energy prices, impacting global markets. The conflict also has the potential to destabilize the region further, leading to increased migration flows and the spread of extremist ideologies. The broader geopolitical implications are significant, as the conflict could reshape the balance of power in the Middle East and beyond. Laleh Khalili’s interview with Democracy Now, “The End of the Petrodollar? How Iran War Is Reshaping the Global Economy: Author Laleh Khalili,” explores the potential economic consequences of the conflict.

The conflict also raises concerns about the potential for escalation and the involvement of other actors. The United States and Israel have repeatedly warned Iran against pursuing nuclear weapons, and have threatened military action if necessary. The possibility of a direct confrontation between the United States and Iran remains a significant risk. The conflict also has implications for the ongoing negotiations over Iran’s nuclear program, which have been stalled for months.

Confirmed vs. Unclear: Navigating the Information Landscape

While the assassination of Ali Khamenei and the subsequent escalation of hostilities are confirmed facts, several aspects of the situation remain unclear. The full extent of U.S. Involvement in the assassination is still being debated, with some reports suggesting a more direct role than others. The precise objectives of Israel’s military operations in Lebanon are also unclear, with some analysts suggesting that Israel is seeking to dismantle Hezbollah’s military infrastructure, while others believe that Israel is aiming for a more limited objective. The potential for a wider regional war remains a significant uncertainty. The motivations and future actions of various regional actors, such as Syria and Qatar, are also subject to speculation.

Looking Ahead: Procedural Next Steps

The immediate future is likely to be characterized by continued violence and instability. Israel is expected to continue its military operations in Lebanon, while Hezbollah is likely to respond with further attacks. The United Nations is likely to play a role in mediating a ceasefire, but the prospects for a lasting peace are dim. The international community will need to address the humanitarian crisis in Lebanon and provide assistance to the displaced population. The longer-term implications of the conflict will depend on a number of factors, including the outcome of the negotiations over Iran’s nuclear program and the evolution of the regional balance of power. The MERIP Roundtable series will continue to provide analysis and insights into these complex developments.