U.S. and Iran Edge Toward War as Trump Renews Hormuz Blockade

President Donald Trump on Monday reinstated the U.S. naval blockade of Iranian ports in the Strait of Hormuz, demanding a 20% fee on all cargo transiting the vital waterway, as tit-for-tat military strikes between Washington and Tehran escalated dramatically. The move effectively collapses the fragile June 17 interim ceasefire and raises the specter of a broader regional conflict, with oil prices surging more than 5% and global stock markets tumbling.

According to BBC News, Trump announced on Truth Social that the U.S. would be “known as ‘THE GUARDIAN OF THE HORMUZ STRAIT’” and would impose a 20% charge on all cargo shipped through the strait to cover the costs of providing “safety and security” in the region. The blockade targets Iranian ships and customers while purportedly allowing other nations to transit freely.

Context: A Ceasefire in Crisis

The latest escalation marks the end of a brief period of relative calm following the June 17 memorandum of understanding between the U.S. and Iran, which lifted a previous three-month blockade and reopened the strait. In the month after that deal, 59 tankers left Iran carrying approximately 72 million barrels of oil, generating potential revenue of more than $5.5 billion, according to BBC Verify.

However, the truce began unraveling in early July after Iran attacked a container ship in the Strait of Hormuz. The U.S. responded with waves of strikes against Iranian military infrastructure, and by July 13, Iran’s foreign ministry spokesman Esmaeil Baghaei declared the framework deal “in crisis,” as Euronews reported.

Military Operations Intensify

The U.S. and Iran have exchanged strikes at a scale unseen since the April ceasefire. U.S. Central Command (CENTCOM) announced it had struck an Iranian submarine and ship maintenance facility at Bandar Abbas Naval Base using Corsair unmanned surface vessels — the first time the U.S. has employed sea drones in combat operations. Iran’s Islamic Revolutionary Guard Corps (IRGC) retaliated with strikes on U.S. military facilities in Bahrain, Jordan, Kuwait, and Oman.

Iran’s top military headquarters, Khatam al-Anbiya, stated it would not allow the U.S. to “interfere in the management” of the Strait of Hormuz, warning that “the flames of war will engulf all the countries of the region” if the conflict spreads. At least 25 people have been killed in Iran since hostilities resumed on Wednesday, according to a tally based on Tehran’s announcements.

The ‘Revenge List’ and Hardliner Influence

Adding an ominous dimension to the crisis, the hardline Iranian newspaper Hamshahri published an infographic naming 13 foreign leaders as targets for retaliation following the death of Supreme Leader Ayatollah Ali Khamenei, who was killed in U.S.-Israeli strikes on February 28. The list includes Trump, Israeli Prime Minister Benjamin Netanyahu, Italian Prime Minister Giorgia Meloni, British Prime Minister Keir Starmer, French President Emmanuel Macron, and German Chancellor Friedrich Merz, among others, as reported by the Hindustan Times.

Iran’s new Supreme Leader, Ayatollah Mojtaba Khamenei, has vowed vengeance, stating: “These criminals, whose names appear on a list, will take to their graves the wish of a peaceful death in their beds.” However, there has been no official confirmation that the newspaper’s list represents the Iranian government’s formal position.

Economic Shockwaves

The renewed blockade has sent immediate shockwaves through global energy markets. Brent crude rose 5.3% to approximately $80 per barrel, while West Texas Intermediate climbed to $75.18, according to CNBC. The Guardian reported that U.S. stock markets fell sharply, with the tech-heavy Nasdaq down 1% and the S&P 500 falling 0.4%, as investors priced in renewed inflation fears. Asian markets were hit even harder, with South Korea’s Kospi plunging 8%.

The Strait of Hormuz is the world’s most important oil transit chokepoint. In 2025, approximately 20 million barrels of oil and oil products passed through daily, accounting for roughly 20% of global oil and liquefied natural gas supplies. Traffic has dramatically decreased since the war began, and ship tracking data shows only a handful of vessels transiting the waterway.

Legal and Diplomatic Contradictions

Trump’s 20% cargo fee has created a notable contradiction within his own administration. Secretary of State Marco Rubio stated earlier in July that “no country is allowed to charge tolls or fees on an international waterway,” calling it a matter of “existing international law.” The UN’s International Maritime Organization similarly holds that no country has a legal right to block shipping in straits used for international transit.

European allies have condemned the escalation. The foreign ministers of Germany, France, and Britain issued a joint statement condemning Iran’s attacks on Gulf countries, while the UK announced it would designate Iran’s IRGC as a national security threat, with supporters potentially facing jail sentences.

What’s Next

Mediation efforts by Qatar, Pakistan, and Oman continue, but analysts are pessimistic about a swift resolution. Bader Al-Saif, an associate fellow at Chatham House, told Euronews that “both sides want to end the impasse on their own terms, and they are increasingly finding it difficult to do so. Hence the return to and increase in the scale of attacks. That only prolongs what will eventually happen: a negotiated settlement.”

Key questions remain unanswered: How will the 20% cargo fee be enforced? Will U.S. allies accept or resist the fee? What role will China play as the largest buyer of Iranian oil? And can diplomatic channels prevent a full-scale war that would devastate global energy markets and destabilize the entire Persian Gulf region?

For now, the world watches as the U.S. and Iran edge closer to open conflict, with the Strait of Hormuz — the artery of global energy trade — at the center of the storm.