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In this analysis
The April ceasefire between the United States and Iran was negotiated under an unusual form of pressure: control over the movement of energy. The agreement came shortly before a US deadline and was tied to Iran allowing safe oil and gas passage through the Strait of Hormuz. That made the waterway part of the bargaining mechanism rather than merely the setting for the conflict.
A chokepoint creates leverage because others cannot ignore it
Hormuz normally carries a substantial share of globally traded petroleum. Disruption therefore imposes costs well beyond the combatants, affecting importers, shipping firms, insurers and governments concerned about inflation. Iran does not need to control the global oil market to possess leverage. It needs the capacity to make passage sufficiently risky or costly that other actors pressure for a solution.
The United States possesses vastly greater conventional military capacity. Iran's leverage is asymmetric: geography allows it to impose costs that military superiority cannot instantly neutralise.
Both governments claimed victory
Washington said military pressure created the leverage for negotiations. Tehran presented the ceasefire as acceptance of its conditions. Those claims are political narratives, not mutually exclusive evidence about why the deal occurred. The observable mechanism was reciprocal restraint linked to navigation through the strait.
The temporary nature of the arrangement also matters. A ceasefire can suspend coercion without resolving the dispute that produced it.
Watch the shipping data
The clearest test is not rhetoric but behaviour: vessel movements, insurance costs, attacks on shipping, energy prices and whether negotiations produce rules durable enough to keep the route open without repeated military deadlines.