Skip to content
You can now search across every topic, entity and event.What's new
Iran Conflict 2026
13APR

Day 45: Trump blockades Iran on a tweet

5 min read
11:20UTC

The US began blockading Iranian ports on 13 April under a Truth Social post with no executive instrument, while Trump simultaneously declared the ceasefire 'holding well.' CENTCOM narrowed Trump's full-strait order to Iranian ports only, allies refused to join, and the IRGC called the blockade piracy, setting up the most dangerous confrontation geometry since the war began.

Key takeaway

The US is enforcing a naval blockade on a social media post with no legal instrument behind it.

This briefing mapped
Loading map…
Military
Diplomatic
Economic
Domestic
Legal
Infrastructure
Humanitarian

The US president announced a naval blockade of Iranian ports via Truth Social with no executive order, proclamation, or legal instrument of any kind.

Sources profile:This story draws on mixed-leaning sources from United States (includes United States state media)
United States

Trump announced a naval blockade of Iranian ports via Truth Social on 12 April with no executive order, proclamation, or presidential memorandum behind it. After 45 days of conflict, the White House presidential-actions page carries zero Iran-related legal instruments.

Kennedy's 1962 Cuban quarantine was backed by Proclamation 3504 before a single ship was stopped. The 2026 blockade references a proclamation that does not exist, leaving Lloyd's of London to suspend Iran-trade coverage and naval officers without clear legal authority. 

Briefing analysis

The last US naval blockade of a sovereign state's ports was the 1962 Cuban quarantine. President Kennedy issued Presidential Proclamation 3504 on 23 October 1962 before enforcement began, grounding the action in both domestic authority and an OAS (Organization of American States) resolution. The legal instrument was considered essential to distinguishing a 'quarantine' from an act of war.

The 2026 Iran blockade has no equivalent instrument. Trump's Truth Social post is the only public record of the order. CENTCOM's operational announcement references 'President Donald Trump's proclamation' but no proclamation appears on the White House presidential-actions page.

Under UNCLOS (United Nations Convention on the Law of the Sea), a blockade of a strait used for international navigation requires specific legal justification. The distinction between blockading Iranian ports (CENTCOM's scope) and blockading the strait (Trump's stated scope) is legally significant: the former targets a belligerent's commerce, the latter restricts international navigation rights.

The War Powers Resolution of 1973 requires presidential notification to Congress within 48 hours of introducing forces into hostilities. The 60-day clock expires approximately 29 April. Whether the blockade constitutes a new introduction of forces or a continuation of existing hostilities is a live legal question.

Someone between the presidential bedroom and Central Command headquarters rewrote the blockade from a full-strait closure to an Iranian-port restriction before a single vessel was turned away.

Sources profile:This story draws on neutral-leaning sources from United States (includes United States state media)
United States

US Central Command enforced the Hormuz blockade from 14:00 GMT on 13 April, but quietly narrowed Trump's order. The presidential post called for stopping all ships in the strait; the military restricted enforcement to vessels at Iranian ports only.

Shipping companies now face 2 competing legal frameworks from the same command. IRGC mine corridors already restrict available channels, so the combined effect amounts to a de facto strait closure regardless of the label on the military order. 

Iran's foreign minister disclosed that the country can no longer enrich uranium at any facility, meaning Islamabad's two-day deadlock over enrichment rights was partly a dispute over a capability Iran does not possess.

Sources profile:This story draws on centre-left-leaning sources from Israel and Qatar
IsraelQatar

Iran's Foreign Minister Abbas Araghchi confirmed on 13 April that US and Israeli strikes destroyed Natanz, damaged Esfahan, and struck Fordow, leaving Iran unable to enrich uranium at any site. The last verified stockpile stood at 440.9 kg of near-weapons-grade material, recorded in September 2025.

Both sides at Islamabad argued over enrichment rights for a capability Iran cannot currently exercise. The real dispute is whether Iran may resume enrichment once it rebuilds, a political question the strikes did not resolve. 

The US blockade attracted only two Gulf host-base states, while the UK assembled 40 nations pursuing the opposite strategy: reopening Hormuz through minesweeping rather than closing it through interdiction.

Sources profile:This story draws on mixed-leaning sources from France and United States
FranceUnited States
LeftRight

The UK, Germany, and Australia refused the US Hormuz blockade. Only UAE and Bahrain joined. A NATO official disclosed the UK is leading a 40-nation coalition, including France, Japan, and Canada, to reopen the strait through minesweeping.

2 opposing Western strategies run over the same waterway: the US blockading Iranian ports, the UK leading a multilateral reopening. France and Japan paid Iran's toll in April, making their ships potential US interdiction targets while both sit inside the UK coalition. 

Trump ordered the Navy to stop any vessel that paid Iran's Hormuz toll, a list that includes French and Japanese ships whose governments refused to join the blockade.

Sources profile:This story draws on mixed-leaning sources from United States (includes United States state media)
United States

Trump ordered the US Navy to intercept any vessel that had paid Iran's Hormuz toll, a provision absent from the military's own operational order. France's CMA CGM Kribi and Japan's Mitsui OSK both paid the fee in yuan in early April, making allied ships targets under the presidential instruction.

US Central Command quietly dropped the provision from enforcement. Paris and Tokyo now hold a grievance against Washington with no public clarification of which version of the order is operative. 

Brent crude jumped 8% past $103 on Monday, reversing the post-ceasefire drop and making Goldman Sachs's $120 Q3 severe scenario the operative frame.

Sources profile:This story draws on neutral-leaning sources from United States (includes United States state media)
United States

Brent Crude jumped 8% to above $103 on 13 April when Trump announced the Hormuz blockade, reversing a post-Ceasefire low of $92.21. About 325 tankers remain stranded in the Gulf, including a dozen Iranian supertankers carrying an estimated $2.4 billion of crude.

Goldman Sachs had cut its Q2 Brent forecast to $90 after the Ceasefire. The blockade made that obsolete within a day, putting the bank's $120 Q3 severe scenario into play as the operative forecast. 

Iran's state broadcaster aired AI-generated footage of Mojtaba Khamenei in a war room because no authentic footage exists, a production choice that confirms rather than closes the gap.

Sources profile:This story draws on centre-leaning sources from Israel
Israel
LeftRight

Iran state television broadcast an AI-generated video on 13 April showing Mojtaba Khamenei entering a war room and surveying a map of Israel's Dimona nuclear facility. No audio accompanied the footage.

If authentic footage existed, Tehran would use it. The Soufan Center assessed on 9 April that Khamenei is unconscious after strikes on 28 February. With no functional Supreme Leader, Iran's 31 semi-autonomous IRGC commands can interpret Ceasefire terms independently or escalate without central authorisation. 

March US consumer prices rose at the fastest rate since Lyndon Johnson was president, with gasoline the primary driver, and these figures predate the blockade.

Sources profile:This story draws on mixed-leaning sources from United States
United States
LeftRight
Sources:CNN Business

The House narrowly rejected a War Powers Resolution on Iran 219-212 on Saturday; Senate Democrats are forcing their own vote this week as the 60-day clock approaches 29 April.

Sources profile:This story draws on centre-left-leaning sources from United States
United States

The House rejected the War Powers Resolution on Iran 219-212 on 12 April. Senate Democrats, led by Mark Warner, announced a Senate vote this week as the 60-day WPR clock approaches its approximate 29 April expiry.

A Senate passage still faces a Trump veto; override needs a two-thirds majority the Democrats do not hold. The WPR clock, the Ceasefire window, and the GL-U lapse all converge in the same 10-day window with no executive instrument behind any of them. 

Sources:NBC News

Saudi Arabia's restoration of the Petroline to full capacity means Riyadh no longer needs the Strait of Hormuz for its own oil exports, changing its stakes in the conflict.

Sources profile:This story draws on centre-right-leaning sources from United Arab Emirates
United Arab Emirates

Saudi Arabia restored the East-West Petroline to full capacity of 7 million Barrels Per Day on 12 April, routing crude from the Eastern Province to Yanbu on the Red Sea and bypassing Hormuz entirely.

At $103 Brent, Saudi Arabia earns roughly $721 million per day regardless of blockade status. Iraq, Kuwait, and Qatar cannot bypass the strait; they earn nothing until it reopens. That divergence reduces Riyadh's urgency to mediate and hands it unilateral pricing power inside OPEC+. 

Sources:The National

Hezbollah rockets wounded two Israeli soldiers in southern Lebanon on Monday as five IDF divisions held positions and Washington scheduled Lebanon talks for next week.

Sources profile:This story draws on mixed-leaning sources from United States (includes United States state media)
United States

Hezbollah rockets wounded 2 IDF soldiers in southern Lebanon on 13 April. Five IDF divisions remain deployed in Lebanon; Israel-Lebanon talks are scheduled in Washington next week, with Israel rejecting Ceasefire as a precondition.

Lebanon's status under the Ceasefire remains unresolved since Day 1: Iran's text included Lebanon, Israel's excluded it, and the ambiguity has never been settled . Daily Hezbollah fire and 5 IDF divisions maintain active escalation risk independent of Hormuz

The first American pope condemned Trump's war rhetoric as 'truly unacceptable'; Trump responded by falsely claiming the pontiff supported nuclear-armed Iran.

Sources profile:This story draws on centre-left-leaning sources from United States
United States

Pope Leo XIV, the first American pope, condemned Trump's war rhetoric as "truly unacceptable" and warned of a "delusion of omnipotence" on 13 April. Trump called him "terrible for foreign policy" and falsely claimed the Pope backed a nuclear-armed Iran.

The Pope's statement contained no reference to Iran's nuclear programme. Trump invented the claim. US presidents have historically been careful with the Catholic Church; attacking the first American pope with a demonstrable falsehood has no modern precedent. 

Sources:NPR
1 NPR

Maritime intelligence firm Windward documented tankers transiting Hormuz under the identities of scrapped vessels, with 14 State Department-sanctioned ships tracked in the region.

Sources profile:This story draws on neutral-leaning sources from Israel
Israel

Windward documented a scrapped LNG carrier's registry reused by an active tanker transiting Hormuz, with 14 State Department-sanctioned shadow fleet vessels tracked in the strait as of 12 April.

Blockade conditions make identity spoofing more attractive: legitimate passages are closed, so adding fraud to an already-sanctioned voyage costs nothing extra. The 14 verified vessels are the visible layer; the true total is higher because the technique is designed to defeat remote monitoring. 

Hengaw's 10th report counted 125,630 damaged civilian structures across 40 days of conflict, while the Red Crescent reported 960 people rescued from the ruins of Tehran buildings.

Sources profile:This story draws on neutral-leaning sources from Iran
Iran

Hengaw's 10th report documented 125,630 civilian structures damaged across Iran in 40 days of conflict: 100,000 residential and 24,000 commercial. Iran Red Crescent reported 960 people rescued from Tehran rubble during the same period.

Reconstruction financing is effectively impossible: the US blockade has frozen oil export revenue, and OFAC sanctions block foreign currency borrowing. Even under a durable Ceasefire, Iran lacks the hard currency to fund rebuilding on this scale. 

Sources:Hengaw
Closing comments

Escalating. The blockade creates structural daily confrontation risk between CENTCOM enforcement patrols and IRGC armed escorts operating in the same waters. No interdiction incident has occurred as of filing. The IRGC's explicit threat of severe force against military vessels, combined with competing navigational authorities (CENTCOM blockade, IRGC mine corridors), means any encounter could trigger the ceasefire's collapse before its formal expiry. The geometry is structural, not contingent.

Different Perspectives
United States
United States
Trump announced the blockade via Truth Social while simultaneously claiming the ceasefire was 'holding well'; CENTCOM then operationalised a narrower port-only version before enforcement began. The administration has produced zero executive instruments for 45 days of war, leaving every naval action legally exposed.
Iran
Iran
Iran's armed forces command called the blockade 'an illegal act' and 'piracy,' while Foreign Minister Araghchi described the Islamabad talks as the most intensive US-Iran engagement in 47 years and claimed discussions reached the brink of an MOU before US maximalism and the blockade intervened. Tehran retains leverage through its Hormuz toll regime and IRGC mine corridors.
United Kingdom
United Kingdom
Prime Minister Starmer refused to join the US blockade and is leading a rival 40-nation coalition to reopen Hormuz through minesweeping and diplomatic pressure rather than port restriction. The UK's counter-strategy directly competes with Washington's approach over the same waterway.
Gulf States (UAE, Bahrain)
Gulf States (UAE, Bahrain)
UAE and Bahrain joined the blockade as the only two coalition members, both operating under the constraint of hosting major US military installations on their soil. Saudi Arabia, by restoring the East-West pipeline to full capacity, has effectively removed its own economic dependence on Hormuz.
Pakistan
Pakistan
Pakistan confirmed it will continue mediating despite the Islamabad talks ending without agreement, but proposed no date for a next round and holds no mechanism to extend the ceasefire. The blockade adds a new Iranian precondition that Pakistan must navigate to restart any diplomatic process.
Israel
Israel
Israel is rejecting a Lebanon ceasefire as a precondition for broader talks; two Israeli soldiers were wounded by Hezbollah rockets on 13 April and five IDF divisions now operate inside Lebanon. Israel's strikes destroyed Iran's enrichment capacity, making the Islamabad enrichment deadlock partly academic.