- Lead. Iran’s IRGC Navy has warned that military vessels approaching the Strait of Hormuz will face a “severe response,” even as the United States continues enforcing a naval blockade of Iranian ports that has been in place since spring.
- Fact. The Islamabad Memorandum, signed June 17 and designed to give both sides 60 days to reach a comprehensive settlement, elapsed in mid-August without producing an agreement on the three core disputes: Iran’s nuclear programme, control of the Strait, and sanctions relief.
- Stake. Iran on August 29 pledged to stand firm against what it called “unjust” US sanctions, signalling that neither party sees sufficient incentive to make the concessions required for a durable settlement.
Six months after the United States and Israel launched coordinated strikes that killed Supreme Leader Ali Khamenei and targeted Iranian military and nuclear infrastructure, the conflict has settled into a grinding endgame. The Islamabad Memorandum, the most structured diplomatic framework produced by the war, gave both sides until mid-August to finalise comprehensive settlement terms. That deadline has now elapsed, and the positions of both parties remain structurally incompatible.
What the Blockade Looks Like on the Water
Following the collapse of the initial talks in April, the Trump administration implemented a full naval blockade targeting Iranian ports. Non-Iranian vessels were permitted to transit, but ships bound for Iran faced interception; the cargo vessel Touska became the first public case when it was stopped on April 19. The IRGC Navy has maintained a parallel posture at the Strait of Hormuz, warning that military vessels approaching the waterway would face a severe response, even as it acknowledged losing track of mines laid during earlier phases of the conflict.
Iran’s Diplomatic Posture
Iran’s position has evolved from tactical flexibility — the country accepted a Pakistan-mediated ceasefire in April and signed the June Memorandum — to open defiance. On August 29, Iranian officials stated publicly that Tehran would stand firm against US sanctions, framing Washington’s financial offensive as “unjust.” Treasury Secretary Scott Bessent, in an article published August 24, described the war as entering its endgame and characterised US economic measures as the “greatest financial offensive ever marshalled against an adversary,” targeting any state that buys or transports Iranian oil. Iran, backed by ongoing trade with Russia and China, has since declared a fully offensive military stance and appears willing to absorb financial pressure rather than concede on the nuclear file.
Where the Standoff Leads
The three issues blocking a settlement — Iran’s nuclear programme, control of the Strait of Hormuz, and the conditions for sanctions relief — are each individually difficult to resolve; together they have proven intractable. Shipping insurers continue to price in elevated risk for Hormuz transits, and energy markets remain sensitive to any signal that the blockade could tighten further. The diplomatic path forward, if one exists, is likely to require either a mediating actor with greater leverage than Pakistan has been able to exercise, or a material shift in one side’s calculation of what it can afford to concede.