European capitals have said no to President Trump’s call for help in the Strait of Hormuz. That refusal does not just signal a diplomatic rift; it leaves the world with no credible Plan B if Iran keeps the waterway shut. Oil markets and Asian allies are now exposed to whatever price Tehran chooses to exact, and the United States cannot fix that alone.
Europe’s Refusal to Patrol Hormuz Leaves Oil Markets at Iran’s Mercy
In March 2026, as Israel’s campaign against Iranian targets intensified and Iran moved to block the Strait of Hormuz, the White House asked European allies to join US-led patrols to keep the waterway open. According to CBS News, America’s European allies rejected President Trump’s demands for help in the Strait. The same report noted that Israel had killed Iran’s top security official Ali Larijani, further tightening the spiral of escalation. The combination — a decapitated Iranian security apparatus and a closed Hormuz — has sent oil prices soaring. Reuters reported that oil jumped to 2022 highs as the conflict expanded, with Brent crude reaching levels not seen in years. Global oil and gas prices have climbed as the Iran crisis disrupts shipping and production. CBS News has covered the link between European refusal, Hormuz risk, and pump prices in detail.
Roughly one-fifth of the world’s daily crude supply and a major share of global LNG moves through the narrow corridor between Iran and Oman. When Iran declared the strait closed and threatened to set ablaze any vessel that tried to pass, tanker traffic dropped to near zero and insurers pulled coverage. CNBC reported that oil rose as the expanding US-Israeli conflict with Iran elevated supply risks. The market is pricing in a prolonged disruption because there is no alternative route for that volume. Europe’s decision not to contribute naval or political weight to reopening Hormuz means that the burden falls entirely on the United States and a handful of regional partners — and that the leverage to reopen it rests as much with Tehran as with Washington.
Why Europe Said No — and What It Costs
European leaders have framed their refusal in terms of sovereignty and strategic priorities. According to The Guardian, European rebukes of the US over temporary sanctions relief for Russian oil have underscored a deeper divergence: European governments are unwilling to align their military and energy policy with Washington’s Hormuz agenda. The same outlet has reported on how EU member states are reacting to the energy crisis triggered by the Iran war — prioritising diversification and reserves over joining a US-led military response. The result is that Trump’s ask for help in the Strait is not just refused; it is treated as part of a pattern of American decisions that Europe will not underwrite. That leaves Asian importers, who depend on Hormuz for a large share of their oil and gas, with a stark choice: rely on the US Navy alone, or cut side deals with Iran and other producers. Neither option is stable.
CBS News has reported that European allies rejected Trump’s demands for help in the Strait of Hormuz. Without European participation, any US-led escort or patrol operation is politically and militarily thinner. Iran can calibrate threats, mine lanes, or harass shipping in ways that force constant escalation decisions onto Washington. So long as Europe stays out, Iran’s ability to set the tempo — and the price of passage — remains high. Oil markets have already priced in that reality: prices have surged as the conflict widened, with analysts citing Hormuz closure and supply cuts across the region. Reuters and CNBC have both documented the spike in crude and the role of Hormuz in that calculus.
The Price Already Being Paid
By March 2026, Brent crude had climbed to levels not seen in years, with Reuters reporting that oil settled up around 5% on supply concerns as the Iran conflict widened. CNBC and Reuters both noted that the expanding US-Israeli conflict with Iran had elevated supply risks and that global energy costs had soared as the Iran crisis disrupted shipping and production. CBS News has continued to cover the triple story: Israeli strikes on Iranian leadership, European refusal to join US patrols, and the impact on oil and gas prices. The numbers tell the story: when Hormuz is in play, the market assumes sustained risk and bids accordingly. There is no discount for a quick resolution when the world’s main oil chokepoint is controlled by a party that has every incentive to keep the world guessing.
No Plan B — The Real Stakes of Going It Alone
There is no substitute for the Strait of Hormuz. Pipelines and alternate sea routes cannot replace the volume that normally flows through the chokepoint. When Iran blocks it, the world pays more for every barrel; when Iran reopens it on its own terms, the world pays in leverage and concessions. The United States can try to keep the strait open with its own forces, but without European cover the mission is harder to sustain and easier for Tehran to exploit. Every incident — every mine, every drone, every boarded ship — becomes a test of American will and capacity. Europe’s refusal does not create a neutral outcome; it creates a world in which Iran and the US (and its few partners) are the only major players in the strait. That is a world in which Iran’s price — whether in sanctions relief, regional influence, or security guarantees — will be paid, one way or another, by someone.
According to CBS News, the killing of Ali Larijani removed a key figure from Iran’s security establishment at a moment when the regime is under intense pressure. The same report tied that event to European rejection of Trump’s Hormuz ask. The message is clear: the US is willing to escalate, but its allies are not willing to follow. For oil-importing nations and for global markets, the takeaway is that the cost of Hormuz closure will be borne until either the US succeeds alone, Iran reopens the strait on its terms, or a broader coalition emerges. Right now, that coalition does not exist.
What This Actually Means
Europe’s refusal to back Trump in the Strait of Hormuz is not a minor policy difference. It is a structural shift: the US can no longer assume that its allies will join it in securing the world’s most important oil chokepoint. That leaves oil markets and Asian allies exposed to Iranian leverage with no Plan B. Prices will stay high, and the risk of a prolonged closure will remain, until either Washington finds a way to reopen the strait without European help, or Europe changes course. Until then, the world is forced to pay Iran’s price — in dollars at the pump, in diplomatic concessions, or in the acceptance of a new normal where Hormuz is a bargaining chip. CBS News has documented the link between allied refusal, Larijani’s death, and the Strait; the conclusion is that the gap between US power and allied trust has never been more visible, or more expensive.
What Is the Strait of Hormuz?
The Strait of Hormuz is a narrow waterway between Iran and Oman that connects the Persian Gulf to the Gulf of Oman and the Indian Ocean. Approximately one-fifth of the world’s daily crude oil supply and a large share of global liquefied natural gas exports pass through it. Roughly 100 oil tankers use the corridor on a typical day. Control or disruption of the strait therefore has an immediate impact on global energy prices and security. In March 2026, Iran declared the strait closed to shipping and threatened vessels that attempted passage, leading to a sharp drop in traffic and a surge in oil prices.
Who Is Ali Larijani?
Ali Larijani was Iran’s top security official and a central figure in the country’s security and political establishment. In March 2026, Israel said it had killed Larijani as part of the escalating conflict between Israel and Iran. His removal was reported alongside the news that European allies had rejected US requests for help in the Strait of Hormuz, underscoring the connection between Iran’s leadership, regional escalation, and the West’s response to the crisis.
Sources
CBS News — Israel targets more Iran leaders as allies reject Trump’s calls for help in the Strait of Hormuz. Reuters — Oil rises as expanding US-Israeli conflict with Iran elevates supply risks. CNBC — Oil rises as expanding US-Israeli conflict with Iran elevates supply risks. The Guardian — How are EU and member states reacting to energy crisis triggered by Iran war?