A Ceasefire on Borrowed Time: The Islamabad MoU Faces Its First Real Test
The fresh exchange of strikes between the United States and Iran has done something that weeks of diplomatic caution had managed to avoid: it has put the credibility of the Islamabad Memorandum of Understanding on open trial. That agreement, brokered with considerable effort and no small measure of goodwill, offered the two adversaries a rare exit ramp from a spiral of confrontation that neither could plausibly win outright. Now, with Washington and Tehran trading accusations of bad faith, the question is no longer whether the ceasefire has cracks. It is whether those cracks can be sealed before they widen into something irreversible.
President Donald Trump’s order to strike Iranian targets, justified by reference to attacks on commercial shipping in the Strait of Hormuz, has reignited fears that once again refuse to stay dormant for long. Iran’s response was neither hesitant nor symbolic. Strikes against American military installations in Kuwait and Bahrain sent an unambiguous message: Tehran will not absorb punishment without answering in kind. This is the pattern that has defined the relationship for years, and it is precisely the pattern the Islamabad MoU was designed to interrupt.
And yet, for all the drama of missiles and military statements, a full-scale war remains unlikely. Both capitals know the price of such a conflict would be immense, and both know that the outcome would look remarkably similar to every previous round of confrontation: destruction, displacement, diplomatic fallout, and no clear victor. The tit-for-tat exchanges are dangerous, but they are also, in a grim sense, familiar. What has changed is that they are now unfolding against the backdrop of an agreement that was supposed to prevent exactly this kind of escalation.
President Trump’s own remarks this week capture the contradiction at the heart of American policy. He declared, on the one hand, that the matter was essentially settled, saying he did not wish to deal with Iran further. In nearly the same breath, he suggested the confrontation would not spiral, noting that Iran had struck a few ships and the United States had responded with considerably greater force. This is not the language of a leader anchored to a coherent strategy. It is the language of improvisation, of a policy that reacts to headlines rather than commits to outcomes. Such contradictions might make for compelling political theatre, but they do little to reassure a region already exhausted by uncertainty.
The burden of keeping the MoU alive does not rest on one side alone, but Washington’s record on implementation deserves particular scrutiny. The agreement was never simply a ceasefire in the narrow military sense. It carried with it specific commitments: relief from sanctions, the release of frozen Iranian assets, and an end to Israel’s military operations in Lebanon. These were not peripheral clauses. They were the substance of the bargain, the incentives that made restraint rational for Tehran. When commitments of this kind go unmet, it becomes difficult to sustain the argument that Iran alone bears responsibility for the agreement’s erosion.
Israel’s conduct throughout this period deserves direct criticism rather than diplomatic euphemism. Time and again, in Gaza, in Lebanon, and now in the wider context of the confrontation with Iran, Israel has shown a preference for sustained military pressure over negotiated settlement. This is not a matter of interpretation; it is a pattern visible across multiple theatres and multiple ceasefire arrangements, each of which has been strained or broken by continued Israeli military action. Every time Israel undermines a ceasefire, it does not merely damage that particular arrangement. It draws the United States deeper into a regional confrontation that Washington has repeatedly signalled it wishes to avoid, and it hands sceptics in Tehran fresh evidence that American promises cannot survive contact with Israeli objectives.
Compounding this problem is the re-imposition of restrictions on Iranian oil exports, a move that has done more than anger Tehran. It has confirmed, in Iranian eyes, a suspicion that has never fully receded: that Washington negotiates agreements it has no intention of honouring in full. Whatever the technical justification for renewed sanctions, the political effect is corrosive. It tells Iran that compliance brings no durable reward, and that lesson, once absorbed, is exceedingly difficult to reverse.
None of this excuses Iran’s own conduct in the Strait of Hormuz. Tehran’s attempt to assert control over the waterway by targeting vessels that transit without its approval may serve immediate strategic purposes, offering leverage in an otherwise asymmetric confrontation with a far more powerful adversary. But this approach comes at a real cost. Freedom of navigation is not a peripheral principle of international law; it is foundational to global trade and maritime order. By threatening it, Iran risks converting sympathetic or neutral observers into critics, and hands Washington a justification, however self-serving, for further military action. Leverage gained through coercion in international waters is leverage that erodes the very legitimacy Iran needs if it hopes to build broader diplomatic support.
Amid this deteriorating picture, the role played by Pakistan and Qatar in brokering the original agreement stands out as something worth protecting rather than discarding. Both countries have consistently urged restraint, called for renewed dialogue, and pressed both parties to honour the letter of the MoU rather than treat it as a temporary pause between confrontations. Their continued involvement, ideally reinforced by the United Nations and other regional stakeholders, represents one of the few remaining mechanisms capable of preventing isolated incidents from metastasising into a full regional crisis. Diplomatic capital of this kind is not easily rebuilt once squandered, and both Washington and Tehran would do well to remember that mediators willing to invest political credibility in de-escalation are not in abundant supply.
The Islamabad MoU remains, despite everything, the most credible available framework for reducing tensions between two states that have spent decades locked in mutual suspicion. But an agreement is only as strong as the willingness of its signatories to honour it beyond convenient moments. Washington cannot selectively implement its commitments and then express surprise when Tehran responds with defiance. Tehran cannot assert control over international waterways and expect that action to be read as anything other than provocation. Compromise, however unsatisfying to domestic audiences on either side, remains the only route to something resembling durable stability. Confrontation has been tried repeatedly, and its results are already well documented. It is difficult to see why anyone should expect a different outcome this time.
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