US and Iran Sign Historic MOU to End War, but Israeli Defiance in Lebanon Threatens Truce

The United States and Iran have officially signed the "Islamabad Memorandum," a sweeping 14-point framework designed to end the devastating 110-day regional war. Brokered primarily by Pakistan, the preliminary agreement was signed digitally and subsequently endorsed by US President Donald Trump at the G7 summit in France and Iranian President Masoud Pezeshkian in Tehran. The deal mandates an immediate cessation of military operations on all fronts, the lifting of the US naval blockade on Iranian ports within 30 days, and the reopening of the Strait of Hormuz to commercial shipping.[2][3]

The memorandum initiates a critical 60-day negotiation window to finalize a comprehensive settlement. During this period, the two nations will attempt to resolve the disposition of Iran's enriched uranium stockpile in exchange for a scheduled termination of economic sanctions. The US has also pledged not to deploy additional forces to the region and to issue waivers for Iranian oil exports while the bilateral talks proceed.[2][3]

The nuclear provisions of the memorandum represent a significant departure from the 2015 Joint Comprehensive Plan of Action (JCPOA). Rather than a finalized technical document, the Islamabad Memorandum serves as a framework that defers the hardest decisions to the 60-day negotiation window. A central point of contention will be Iran's stockpile of uranium enriched to 60 percent purity. While the US insists on down-blending this material on Iranian soil under International Atomic Energy Agency supervision, the exact verification mechanisms remain unresolved.[3]

However, the fragile truce faces an immediate and severe threat from an excluded party: Israel. The first clause of the memorandum explicitly requires an end to hostilities "on all fronts, including in Lebanon," effectively demanding that Israel halt its campaign against Hezbollah and withdraw from Lebanese territory. Because Israel was not a party to the US-Iran negotiations, the Israeli government has bluntly refused to be bound by the mandate.[1][4]

Israeli Prime Minister Benjamin Netanyahu and the Israel Defense Forces (IDF) have maintained their military operations in southern Lebanon, insisting that a security buffer zone is necessary to protect northern Israel. Israeli officials argue that the US-Iran deal is a strategic setback that leaves Iran's proxy network weakened but intact, and fails to permanently dismantle Tehran's nuclear infrastructure.[1][4][5]

The domestic political calculus in Israel further complicates the situation. Netanyahu faces immense pressure from his right-wing coalition partners to decisively degrade Hezbollah's military capabilities, especially after months of cross-border rocket fire that displaced tens of thousands of northern Israeli residents. For the Israeli government, accepting a ceasefire that leaves Hezbollah entrenched on its border is viewed as an unacceptable security risk, regardless of Washington's diplomatic priorities.[1][4]

The ongoing Israeli strikes have prompted furious reactions from Tehran, threatening to unravel the entire diplomatic effort. Iran's Foreign Ministry warned that a continued IDF presence in southern Lebanon would result in the "annulment" of the memorandum. Iranian officials have made it clear that they expect the Trump administration to force Israeli compliance, testing the limits of US leverage over its closest Middle Eastern ally.[4][5]

Beyond the geopolitical standoff in the Levant, the agreement's promise to restore global energy markets faces severe logistical hurdles. The Strait of Hormuz, a vital maritime chokepoint that normally handles a fifth of the world's oil supply, remains effectively closed despite the formal end of the US naval blockade. The independent tanker owner association, Intertanko, estimates that approximately 80 naval mines remain in the center of the strait, requiring a massive and dangerous clearing operation before normal traffic can resume.[7]

Furthermore, the future administration of the waterway remains a point of intense friction. While the memorandum stipulates that Iran will allow toll-free passage for commercial vessels during the initial 60-day negotiation period, Iranian officials have signaled their intent to implement "service fees" once that window expires. This has alarmed the global shipping industry and neighboring Gulf states, who view the proposed fees as a violation of international maritime law and a continuing threat to freedom of navigation.[6][7]

The coming weeks will determine whether the Islamabad Memorandum serves as the foundation for a lasting regional settlement or merely a brief pause in a devastating conflict. If the US can broker an Israeli withdrawal from Lebanon and coordinate the demining of the Strait of Hormuz, the global economy could begin to recover from the recent energy shock. But if the Lebanon ceasefire collapses, both sides have indicated they are prepared to walk away, plunging the Middle East back into an unpredictable and escalating war.[1][3][6]