Israel Intensifies Lebanon Offensive, Killing Civilians, as US Pursues Iran Deal

On the night of May 26, 2026, Israeli warplanes struck the village of Mashghara in Lebanon's Bekaa Valley, killing 12 people, including several members of one family [1]. The strike was part of a broader overnight campaign hitting more than 100 Hezbollah sites across southern and eastern Lebanon [2]. It came days after Prime Minister Benjamin Netanyahu authorized more intensive strikes against Hezbollah — and three days before Lebanese and Israeli military delegations were scheduled to meet in Washington for direct ceasefire talks [1].

The Mashghara strike is one data point in a pattern that has defined the first half of 2026: Israel conducting an expanding air and ground campaign in Lebanon while the United States simultaneously pursues a nuclear and ceasefire agreement with Iran, Hezbollah's primary sponsor. The two tracks are on a collision course.

The Human Cost

The scale of destruction in Lebanon since hostilities escalated on March 2, 2026, has been staggering. The Lebanese Ministry of Health reported 486 deaths and 1,313 injuries in the first week alone, with casualties more than doubling between March 5 and March 8 [3]. By March 11, more than 600 people had been killed and at least 1,580 wounded, with 20 percent of casualties in the first seven days being children [4].

Source: Lebanese Ministry of Health / OCHA

Data as of May 26, 2026CSV

The deadliest single day came on April 8 — referred to as "Black Wednesday" — when Israel launched what it described as its "most powerful attacks" on Lebanon. In a 10-minute onslaught, Israeli forces struck more than 150 locations simultaneously, killing at least 303 people and wounding 1,150 others [5]. Many of those strikes hit densely populated residential neighborhoods and commercial areas in central Beirut [5]. By late May 2026, the total death toll had surpassed 3,000, encompassing both militants and civilians [6].

Over one million people — roughly one in five of Lebanon's population — have been displaced [6]. The UN described the country as at a "breaking point" in March, before the worst of the escalation had occurred [7].

For comparison, the 2006 Lebanon War lasted 34 days and killed approximately 1,191 Lebanese people, the majority of them civilians. The 2026 conflict has already exceeded that toll several times over and shows no signs of abating.

Israel's Military Rationale

Israel's stated justification rests on Hezbollah's refusal to disarm and its continued military buildup since the November 2024 ceasefire. Israeli Defense Minister Israel Katz has said the military will control a "security zone" up to the Litani River until the Hezbollah threat is removed [8].

The IDF has cited specific operational findings to support its position. Since the truce took effect, the military says it has killed over 390 Hezbollah operatives, struck hundreds of Hezbollah sites, and conducted more than 1,200 raids in southern Lebanon [9]. In one publicized incident, troops reported discovering a weapons storage facility inside a child's room in Aadshit al-Qusayr, containing rifles, grenades, rocket-propelled grenades, and machine guns [9].

Hezbollah has fired over 1,000 drones and more than 700 rockets since the 2024 ceasefire [8]. IDF Chief of Staff Lt. Gen. Eyal Zamir stated bluntly that there "is no ceasefire" [10]. Hezbollah's leadership has explicitly rejected disarmament, calling a Lebanese government disarmament decree a "grave sin" and promising to treat it "as if it does not exist" [9].

The Foundation for Defense of Democracies, a hawkish Washington think tank, characterized Hezbollah's actions as sustained ceasefire violations justifying Israeli military response [11]. But this framing is contested.

The Proportionality Question

The United Nations has documented what it describes as systematic violations of international humanitarian law by Israeli forces. A UN report found that operations in Lebanon involved "direct attacks on civilians, including medical personnel," and documented strikes that leveled multi-story residential buildings, killing entire families [5].

UN human rights experts specifically invoked Articles 48, 51(4), and 51(5)(b) of Additional Protocol I to the Geneva Conventions — the legal provisions requiring parties to distinguish between combatants and civilians — and said the pattern of strikes constituted "prima facie violations" of both the principles of distinction and proportionality [5] [12].

The International Bar Association's Human Rights Institute called for accountability and "lasting peace," noting that strikes on civilian areas in central Beirut could not be reconciled with obligations to take feasible precautions under Article 57 of the Additional Protocols [12].

The United Nations separately counted more than 10,000 Israeli ceasefire violations under the November 2024 agreement, alongside hundreds of Lebanese deaths [13]. Hezbollah, too, committed violations, and the UN noted that Hezbollah rockets fired into Israel "may breach international law" [14]. But the asymmetry in casualties — Lebanese deaths outnumbering Israeli deaths by orders of magnitude — has made proportionality the central legal and political question.

The US-Iran Deal: What's on the Table

While bombs fall on Lebanon, US and Iranian negotiators are attempting to finalize an agreement that would formally end the 2026 Iran war, reopen the Strait of Hormuz, and impose new limits on Iran's nuclear program.

As of late May, the framework under discussion includes several key provisions [15] [16]:

• Nuclear moratorium: Iran would commit to suspending uranium enrichment for a period still under negotiation. Iran has proposed five years; the US has demanded 20. A compromise around 12 years has been discussed.
• Enriched uranium: Two sources say Iran would agree to remove its highly enriched uranium from the country, though this remains disputed.
• Inspections: Iran would accept an enhanced inspections regime, including snap inspections by UN inspectors, and commit not to operate underground nuclear facilities.
• Sanctions relief: The US would lift sanctions and release billions in frozen Iranian funds.
• Strait of Hormuz: Both sides would lift restrictions on transit, initially for a 60-day period during which detailed negotiations would continue.

The deal's timeline is driven by economic pressure. The Strait of Hormuz disruption has sent oil prices surging — WTI crude hit $114.58 per barrel in April 2026, up more than 75% year-over-year [17]. Gulf states have faced GDP contraction projections of up to 14% for Qatar and Kuwait, and 3-5% for Saudi Arabia and the UAE [18].

Source: FRED/EIA

Data as of May 18, 2026CSV

But a central unresolved question is whether Lebanon is part of the deal. Iran has insisted that any ceasefire must include a cessation of hostilities against Hezbollah [19]. Netanyahu has said the opposite — that the April ceasefire did not apply to Lebanon [19]. Pakistan, which mediated the talks, has sided with Iran's interpretation [19]. Hours after the April ceasefire announcement, Israel launched its largest airstrikes of the war, killing more than 350 people [19].

US Leverage — or Lack of It

The question of American influence over Israeli military operations is central to this story. The record suggests that leverage exists in theory but has not been exercised.

Since October 7, 2023, the United States has enacted legislation providing at least $16.3 billion in direct military aid to Israel, including an $8.7 billion supplemental package in April 2024 and $3.8 billion per year in annual appropriations [20]. In early 2025, the Trump administration rescinded the Biden administration's conditions on that aid, calling them "baseless and politicized" [20].

President Trump reportedly stated that Lebanon was not included in the conditional ceasefire that began April 8, and that Israel's bombing of Lebanon was a "separate skirmish" [20]. This framing effectively gave Israel diplomatic cover to continue operations.

J Street, a liberal pro-Israel advocacy group, has called for conditioning US economic and security assistance on "quantifiable benchmarks and outcomes" [21]. But no such conditions are currently in place. The historical record offers little precedent for successful US restraint of Israeli military operations through aid conditions — previous administrations have occasionally delayed weapons deliveries but never cut aid in response to specific operational decisions.

Regional Fallout

The dual dynamic — American dealmaking with Iran alongside continued Israeli strikes — has produced friction across the region.

Arab League chief Ahmed Aboul Gheit accused Israel of "persistently seeking to sabotage" the Iran ceasefire deal [18]. Gulf states have prioritized damage control, advocating for an end to the war to preserve long-term coexistence with Iran. Qatar's foreign ministry noted that "we will be neighbours [with Iran] for the future of humankind" [18].

On March 11, the UN Security Council passed a resolution demanding the end of attacks by Iran and its proxies against Arab states and civilians — a resolution first proposed by Arab Gulf states [18]. Oman, the only Arab Gulf state to directly criticize both US and Israeli attacks, has sought to maintain a middle position [18].

The economic dimensions are significant. The Strait of Hormuz disruption has affected fuel supplies across Asia and created ripple effects in global energy markets [19].

Source: FRED / EIA

Data as of May 18, 2026CSV

The historical parallel to the Abraham Accords is instructive but imperfect. Those agreements normalized relations between Israel and several Arab states in 2020 without resolving the Palestinian issue. They held — but they were signed during a period of relative calm, not amid active Israeli military operations killing thousands of civilians in a neighboring country. Whether a US-Iran deal can hold while Lebanese hospitals overflow with casualties is an open question.

The Iran-Hezbollah Connection

Any US-Iran agreement would affect Hezbollah operationally, given that Iran is the group's primary funder and arms supplier. But the relationship between a nuclear deal and ground-level hostilities is not straightforward.

Iran has used Hezbollah as a bargaining chip, insisting that Lebanon be included in ceasefire terms [19]. Hezbollah signaled a pause in attacks following the April ceasefire announcement — only for Israel to launch its largest strikes immediately after [6]. This sequence undermined the credibility of both the ceasefire framework and the argument that a deal with Tehran would translate into reduced violence in Lebanon.

Lebanese government officials have had limited agency throughout the conflict. The country's political system, weakened by years of economic crisis and the 2020 Beirut port explosion, has been unable to assert sovereign control over either Hezbollah's military operations or Israel's strikes on Lebanese territory.

What Comes Next

The immediate trajectory depends on three variables: whether the US-Iran deal closes, whether Lebanon is included in its terms, and whether Israel accepts any constraints on its operations.

The Lebanese-Israeli military delegations are scheduled to meet in Washington before the end of May [1]. The US-Iran framework envisions a 30-day negotiation period following the initial memorandum of understanding [15]. Iran's willingness to remove enriched uranium and accept snap inspections remains contested [16].

Meanwhile, the IDF has called up an additional battalion to Lebanon [1], Netanyahu has authorized more intensive strikes [2], and UN monitors continue to document what they describe as violations of international humanitarian law [5].

The gap between diplomatic language in Washington and military reality on the ground in Lebanon has rarely been wider. Whether that gap closes through agreement or widens through further escalation will shape the Middle East for years to come.

Source: UNHCR Population Data

Data as of Dec 31, 2025CSV

Note: Displacement figures for Lebanon in 2026 (over 1 million) are not yet reflected in UNHCR annual refugee data above, which captures 2025 figures. Syria remains the world's largest source of refugees at 5.5 million.