Three Weeks the Bypass Worked

For three weeks in June and early July, the multibillion-dollar architecture built to make Gulf oil "strait-proof" actually worked. The US-Iran ceasefire that took hold in mid-June opened a window, and the pipelines, storage tanks, and overland corridors rushed into it. Brent crude collapsed from $120 to roughly $70 a barrel ^[1]. The United Arab Emirates, pumping through its Fujairah pipeline on the Gulf of Oman and drawing on 42 million barrels of underground storage at Mandous, reached 85 percent of its pre-war export levels ^[2]. Saudi Aramco resumed shipments from Ras Tanura through the Strait of Hormuz itself, reducing its reliance on the Red Sea pipeline ^[3]. Fatih Birol, the head of the International Energy Agency, said the bypass operations combined with the ceasefire had prevented a major global supply shock ^[2]. The engineering had done what it was designed to do. The ceasefire collapsed between July 10 and 12, when the United States resumed strikes on Iran after Iranian retaliatory attacks destroyed US military infrastructure across five Middle Eastern countries ^[4][5]. On July 13, an Iranian flight landed in Yemen carrying between 10 and 21 IRGC commanders, military equipment, and gold, with instructions to Houthi forces to prepare to close Red Sea oil routes if the US attacked Iranian infrastructure ^[6]. The threat was not new. Houthi officials had threatened a maritime blockade on Saudi Arabia in January ^[7] and declared in April that no force would be able to reopen Bab al-Mandeb if Sanaa decided to close it ^[8]. The IRGC had explicitly warned it would use its Houthi allies to close the strait if the US targeted Iranian power plants and bridges ^[9]. The July 13 flight was not the invention of a new strategy but the activation of one that had been telegraphed for months. The execution unspooled over the following week. On July 21, Houthi rebels formally announced a new Red Sea blockade ^[10]. By July 23, Houthi forces had struck two Saudi-flagged tankers in the Red Sea while the IRGC simultaneously turned back three oil tankers in the Strait of Hormuz ^[11]. Saudi Arabia, which had diverted crude from Hormuz to its Red Sea terminals, found the bypass route closed. Both chokepoints were now active at once. Hormuz traffic plummeted to 1.27 percent of pre-conflict averages — only three commodity vessels transited, with LNG and very large crude carriers completely absent for two consecutive days ^[12]. Brent spiked back above $100 a barrel ^[13]. The deeper pattern is that Iran's goal is not to permanently shut the Strait of Hormuz. It is to control and monetize it. On July 7, while the ceasefire still held, Iran and Oman proposed joint transit tolls for the strait — a mechanism market analysts warned could be a more potent economic weapon than military escalation on the corridor that carries 20 percent of globally traded oil ^[14]. Iran does not recognize the transit-passage regime under the UN Convention on the Law of the Sea and instead applies innocent passage, giving itself the legal authority to stop, inspect, and charge vessels ^[14]. On July 12, the day the ceasefire collapsed, Foreign Minister Abbas Araghchi declared that Iran has always been the guardian of the strait and will remain so forever ^[9]. And when the International Maritime Organization proposed an alternative shipping corridor along the coast of Oman, Araghchi warned that any bypass separate from Iranian management would only lead to further complications, delay the reopening of the Strait of Hormuz, and increase the level of tension ^[15]. In Iran's framing, a bypass is not a solution — it is a provocation that justifies keeping the original chokepoint shut. The selective enforcement makes the strategy visible. Chinese tankers broadcasting their nationality and crew status on AIS transponders have been allowed through Hormuz, while US-aligned shipping is attacked or turned back ^[16]. The chokepoint is not a wall. It is a toll gate, and the toll is political alignment. The United States keeps responding with engineering. Goldman Sachs estimates that bypass infrastructure could make 60 percent of the Gulf's prewar oil exports strait-proof by 2028 ^[17]. The US has endorsed a third corridor along the coast of Oman ^[4]. Saudi Arabia plans to expand its East-West pipeline to Yanbu, a project that will take years ^[18]. All of this treats the chokepoint as a geographic problem with a pipeline solution. But Iran has made clear it will treat every new corridor as a sovereignty challenge — and it has already demonstrated it can close the Red Sea exit those pipelines feed into. The symmetry is hard to miss. On the same day Araghchi declared Iran the strait's guardian forever, Donald Trump declared the United States the Guardian of the Hormuz Strait and proposed a 20 percent transit toll on non-Iranian cargo ^[9]. Same language, same instinct — both sides reaching for the chokepoint as a revenue lever, neither reaching for the conflict that makes it one.