U.S. and Iran Reach Tentative Peace Deal to End 100-Day War: What the Agreement Covers and Where It Could Fail

The United States and Iran have reached a tentative agreement to end a devastating 100-day war that has rattled global energy markets and reshaped the security architecture of the Middle East. Mediated by Pakistan and Qatar, the deal was electronically signed by U.S. President Donald Trump and Iranian officials over the weekend, setting the stage for a formal signing ceremony in Geneva on Friday.[1][2]

The immediate centerpiece of the 14-point Memorandum of Understanding (MOU) is the reopening of the Strait of Hormuz, a critical chokepoint for global oil supplies that Iran had effectively blockaded since the conflict began in late February. In exchange, the United States will lift its retaliatory naval blockade on Iranian ports, allowing maritime traffic to resume and easing the severe economic shock that has sent energy prices soaring worldwide.[2][3]

President Trump heralded the agreement on social media, declaring that the strait would be completely open and toll-free by Friday, urging the "ships of the world" to start their engines. Iranian officials confirmed the text had been finalized but emphasized that the agreement was drafted in an atmosphere of deep, continued distrust between the two nations, warning against premature optimism.[1][3]

While the immediate cessation of hostilities brings relief to global markets, the MOU is essentially a battlefield pause that starts a ticking clock. The agreement establishes a 60-day ceasefire window during which Washington and Tehran must negotiate a comprehensive final settlement regarding Iran's nuclear program and the lifting of crippling international sanctions.[2][4]

A central component of those upcoming technical negotiations will be the fate of an estimated $24 billion in Iranian assets frozen overseas. Iranian media and government officials have heavily promoted the potential release of these funds and the resumption of oil sales as a vital lifeline for an economy battered by years of sanctions and the immense financial strain of the recent conflict.[2]

However, the Trump administration has insisted that Iran must meet strict benchmarks, particularly concerning the dismantling of its highly enriched uranium stockpile, before receiving any economic benefits. Trump stated firmly that the primary focus of the deal is ensuring Iran never acquires a nuclear weapon, warning of severe military consequences if Tehran violates that core tenet.[1][3]

The most immediate threat to the fragile agreement comes not from Washington or Tehran, but from Jerusalem. The MOU reportedly includes a provision demanding the permanent termination of military operations on all fronts, which Iranian officials insist covers the ongoing conflict in Lebanon.[1][2]

Israel, which launched the war alongside the U.S. in late February, was not a party to the negotiations and has fiercely rejected the notion that the deal binds its military actions. Prime Minister Benjamin Netanyahu reportedly informed Trump that Israeli forces will not withdraw from southern Lebanon and will continue their campaign against the Iran-backed Hezbollah militant group.[3][4]

This divergence erupted into public view when Israel launched an airstrike on a Hezbollah command center in Beirut just as the deal was being finalized. Trump issued a rare public rebuke of the Israeli strike, stating it "should not have happened" so close to a peace agreement, highlighting a growing rift between the U.S. administration and its closest Middle Eastern ally.[1][5]

Hezbollah, for its part, credited Iran with securing a major diplomatic achievement, suggesting the agreement could lead to the full liberation of Lebanese territory and the reconstruction of war-torn areas. Yet, if Israel continues its offensive, Tehran could view the continuation of hostilities as a breach of the MOU, threatening to unravel the entire framework before the 60-day window even closes.[4]

Beyond the Middle East, the agreement is facing intense scrutiny and skepticism within the United States, particularly from Trump's own Republican party. Lawmakers returning to Capitol Hill expressed frustration over being kept in the dark about the specifics of the 14-point plan and the financial incentives offered to Tehran.[6][7]

Key Republican figures, including Senator Lindsey Graham and Senate Majority Leader John Thune, have demanded that Congress review and vote on the final agreement. They are particularly wary of any provisions that would release billions of dollars to Iran without ironclad, verifiable guarantees that its nuclear infrastructure is permanently dismantled.[6][7]

Vice President JD Vance defended the administration's efforts, acknowledging that the MOU is a general document and that the complex technical details will be hammered out during the 60-day negotiation phase. Vance credited Trump's unconventional diplomacy for bringing the conflict to a halt and opening the door to a new era of stability in the region.[6][7]

In Tehran, the domestic reaction is equally fractured. Reformist politicians and former diplomats who championed the 2015 nuclear accord have cautiously welcomed the new memorandum as a courageous step toward economic relief and international reintegration.[8]

Conversely, hardline Iranian factions have sharply criticized the agreement, arguing that the negotiators made too many concessions and surrendered Iran's primary leverage—the closure of the Strait of Hormuz—without securing immediate, guaranteed sanctions relief. They view the deal as a symbolic victory handed to the U.S. president, questioning whether Washington can be trusted to follow through on its commitments.[8]

Energy analysts and international observers remain cautiously optimistic but warn that the structural drivers of the conflict remain unresolved. The International Energy Agency stressed that unconditionally reopening the Strait of Hormuz is vital to ending the global energy crisis, but shipping companies may hesitate to resume normal operations until the security situation is definitively stabilized and the threat of rogue mines is cleared.[3][5]

Ultimately, the Geneva signing ceremony will mark the end of the immediate war, but it represents only the beginning of a highly volatile diplomatic process. With Israel defiant, U.S. lawmakers demanding oversight, and Iranian hardliners watching closely, the 60-day window to forge a lasting peace will test the limits of both American and Iranian statecraft.[1][4]