In a choreography of digital diplomacy and old-world pageantry, the presidents of the United States and Iran brought their four-month war to a provisional close late on Wednesday. Donald Trump signed a paper copy of the “Islamabad Memorandum of Understanding” during a dinner with Emmanuel Macron at the Palace of Versailles, while Masoud Pezeshkian affixed his signature remotely in Tehran. The White House released a video of Trump scrawling his name on the Persian-language version of the document, and Iranian state media published photographs of Pezeshkian holding the signed text. Pakistan’s prime minister, Shehbaz Sharif, whose government mediated the talks, added his own signature shortly afterwards, cementing a pact that entered into force immediately.

Viewed from any capital, the memorandum’s 14 points represent an ambitious framework rather than a final settlement. The parties declare an immediate and permanent cessation of military operations on all fronts, including Lebanon, and commit to refrain from the threat or use of force. Washington will begin lifting its naval blockade of Iranian ports, with full removal within 30 days, while Tehran guarantees the reopening of the Strait of Hormuz and pledges not to levy fees on passing vessels. The United States will waive sanctions, unfreeze Iranian assets, and back a $300 billion reconstruction fund. On the nuclear file, Iran undertakes not to produce weapons-grade material and to dilute its stockpile of highly enriched uranium, though the precise modalities are deferred to a 60-day negotiation window that can be extended by mutual consent.

The accord caps a conflict that erupted on 28 February 2026, when American and Israeli forces launched strikes against the Islamic Republic. After roughly 40 days of all-out combat—during which Iranian forces downed advanced fighter jets, struck US naval vessels, and closed the Strait of Hormuz—a military stalemate pushed both sides toward a ceasefire and the Pakistani-mediated channel that produced the memorandum. The document is the first jointly signed instrument by an American and Iranian president since the 1979 revolution, a fact that Iranian officials were quick to highlight. Parliament speaker Mohammad Bagher Ghalibaf, Tehran’s chief negotiator, called the outcome “a record defeat” for the United States, while foreign ministry spokesman Esmaeil Baghaei said Iran had achieved through talks what it could not have gained by war.

Reactions diverged sharply along ideological and geographic lines. In Washington, Republican hawks condemned the deal as a capitulation that rewards Iranian aggression, while Trump insisted it “achieves everything we set out to accomplish” and warned he would “bomb the hell out of them” if Tehran violated its commitments. European leaders, gathered at the G7 summit in France, welcomed the prospect of restored energy flows through Hormuz and a potential drop in oil prices. Macron hailed the signing as “an important step in the right direction.” In the region, the memorandum’s repeated references to Lebanon’s territorial integrity and sovereignty underscored the conflict’s spillover, though Israeli compliance with the ceasefire remained a point of contention, with Iran accusing the “Zionist entity” of violations.

The coming 60 days will test whether the memorandum can evolve into a durable peace. Negotiators must resolve the most intractable questions—the ultimate disposition of Iran’s enriched uranium, the sequencing of sanctions relief, and verification mechanisms—while managing deep mutual mistrust. Trump’s threat to resume attacks if talks stall injects a volatile edge into the process. Analysts in London note that the digital, non-ceremonial signing, deliberately chosen to reduce the political cost of any future breach, reflects the fragility of the moment. For now, the Strait of Hormuz is expected to reopen fully, offering a reprieve to global energy markets. But the path from a memorandum of understanding to a binding final agreement remains strewn with the same geopolitical landmines that ignited the war.