US Ally Pledges Support for Effort to Reduce Iran's Control Over Strait of Hormuz

The Strait of Hormuz—21 miles wide at its narrowest point, responsible for roughly 20% of global petroleum consumption—has been effectively closed to commercial traffic since February 28, 2026 [1]. The closure, triggered by Iran's response to US-Israeli airstrikes that killed Supreme Leader Ali Khamenei, has stranded approximately 1,600 merchant vessels and 23,000 seafarers from 87 countries [2]. Oil prices have surged 75% year-over-year, with WTI crude reaching $114.58 per barrel in April 2026 [3].

Against this backdrop, Czech Foreign Minister Petr Macinka declared on May 27 that Prague is "ready to contribute to freedom of passage and the Hormuz trade" [4]—the latest in a series of pledges from US allies seeking to demonstrate solidarity with Washington's campaign to reopen the waterway. The announcement, while symbolically significant, raises a question that hangs over the entire effort: what does "breaking Iran's grip" actually mean, and can the coalition assembling to do it deliver?

What the Czech Republic Is Actually Offering

The Czech Republic is landlocked. It has no navy. What it does have is a Cold War-era passive radar industry that has become globally competitive. Czech company ERA manufactures the DPET (Deployable Passive ESM Tracker) system, capable of detecting and tracking aircraft, drones, and maritime targets without emitting signals that could reveal its position [5]. ERA's passive radar systems operate in 69 countries [5].

Prime Minister Andrej Babiš announced that Prague would offer the DPET system for Hormuz security operations, and France and the United Kingdom have expressed interest in integrating it into their coalition framework [6]. Macinka framed Iran's threat through four categories: nuclear proliferation, drones and ballistic missiles, international terrorism, and control of the Strait of Hormuz [4].

The dollar value of the Czech contribution has not been publicly disclosed. Compared to the naval assets deployed by the United States—guided-missile destroyers, over 100 aircraft, and unmanned platforms for Operation Project Freedom [2]—the Czech offer is modest in scale but addresses a specific operational gap: detecting Iran's swarm boat tactics and drone threats without exposing detection assets to anti-radiation missiles.

The Chokepoint That Feeds the World

Before the 2026 crisis, the Strait of Hormuz carried approximately 20 million barrels of oil per day, equivalent to about one-quarter of all seaborne oil trade [7]. Around one-fifth of global liquefied natural gas shipments—primarily from Qatar—also transited the waterway [7]. Eighty-four percent of crude oil flowing through Hormuz was bound for Asian markets, with China, India, Japan, and South Korea receiving 69% of total flows [7].

Source: EIA / Statista

Data as of Mar 1, 2025CSV

The strait's importance has grown over the past two decades. In 2003, roughly 15.4 million barrels per day passed through Hormuz. By 2018, that figure had reached 20.7 million barrels per day [7]. While US dependence on Persian Gulf oil has fallen to its lowest level in nearly 40 years—about 0.5 million barrels per day, or 2% of US consumption [7]—the strait's closure has nonetheless sent global prices sharply higher, demonstrating that in an interconnected energy market, supply disruptions anywhere affect prices everywhere.

Source: FRED / EIA

Data as of May 18, 2026CSV

WTI crude oil prices bottomed at $55.44 per barrel in December 2025. By late May 2026, they had doubled to over $112 per barrel [3], imposing costs on consumers and economies worldwide regardless of their direct dependence on Gulf oil.

Iran's Legal Position and the UNCLOS Dispute

The legal status of transit through the Strait of Hormuz is contested. Under the United Nations Convention on the Law of the Sea (UNCLOS), the strait qualifies as an international waterway subject to "transit passage"—a right that "shall not be impeded" and cannot be suspended, even during wartime [8]. Most international legal scholars treat this regime as customary international law, binding on all states regardless of whether they have ratified UNCLOS [8].

Iran disagrees. Upon signing UNCLOS, Tehran declared that the transit passage regime is not customary law but a "package deal" applicable only among parties to the convention [9]. Iran maintains that it is obligated only to grant the more limited right of "innocent passage," which can be suspended for security reasons [9]. Tehran also claims that foreign warships must coordinate access with Iranian authorities [9].

This legal ambiguity provided the foundation for Iran's pre-2026 pattern of selective enforcement. In May 2026, Iran went further, establishing a "Persian Gulf Safety Area" (PGSA) regulatory zone and asserting authority to charge tolls on vessels transiting the strait—a step that legal scholars at the European Journal of International Law described as "codifying coercion" [10].

A Decade of Escalating Incidents

Iran's actions in and around the Strait of Hormuz have escalated in frequency and boldness over the past seven years.

Source: International Crisis Group / AP / Reuters

Data as of Jan 1, 2026CSV

In 2019, Iran seized the UK-flagged tanker Stena Impero and held it for over two months. The same year, the US attributed a series of limpet mine attacks on tankers to Iran's Islamic Revolutionary Guard Corps (IRGC) [11]. In 2021, a drone attack on an Israeli-linked tanker killed two crew members [11]. Iran seized two Greek tankers in 2022 and the Portuguese-flagged MSC Aries in April 2024 [11]. In December 2025, IRGC naval forces seized a Marshall Islands-flagged tanker over alleged fuel smuggling [12].

These incidents primarily targeted vessels flagged to nations aligned with the United States or Israel. The insurance consequences have been substantial: war-risk premiums for Gulf transit spiked after each major incident, and since the February 2026 closure, most insurers have refused to cover Hormuz transits entirely [13].

Since the war began, 32 commercial ships have been struck by missiles in or near the strait, resulting in 10 deaths and at least a dozen injuries [2].

The Coalition: Ambitions vs. Reality

The international response has coalesced around two parallel tracks.

The UK-France Coalition: Launched on April 2, 2026, this framework grew from a founding declaration into a 40-plus-nation coalition. By the May 12 Joint Statement, 27 nations had formally signed on, including three GCC states—Bahrain and the UAE as founding signatories, with Qatar joining at the May expansion [14]. The coalition's stated objectives include ensuring "access to insurance at reasonable costs" and enabling "the resumption of normal operations as soon as practicably possible" [13].

Operation Project Freedom (US): President Trump announced on May 3 that US forces would "guide" stranded ships out of the strait [15]. The operation, backed by guided-missile destroyers and over 100 aircraft, launched on May 4—and lasted 48 hours [2]. Only two ships were escorted through before Trump paused the mission on May 6, citing "great progress" toward a diplomatic agreement [2].

The gap between coalition rhetoric and results is stark. As CNN reported, for the tens of thousands of seafarers stranded on 1,600 ships, "Project Freedom was anything but successful" [2].

The Gulf States: A Fractured Response

The GCC's response reveals deep divisions rather than unified resolve.

The UAE has been the most forward-leaning, championing Project Freedom and signing on to the UK-France coalition as a founding member [14]. Bahrain, which hosts the US Fifth Fleet, joined alongside the UAE [14]. Qatar, whose LNG exports have been entirely halted by the closure (it has no pipeline bypass), joined the coalition at its May expansion [14].

Saudi Arabia, however, has conspicuously avoided formal participation. Riyadh, along with Kuwait, pressed Washington to suspend Project Freedom out of concern that Iranian retaliation could target their oil infrastructure [16]. Saudi Arabia has pipeline capacity—the East-West pipeline to the Red Sea port of Yanbu—that provides a partial bypass for its own exports, reducing its urgency [17]. Saudi officials have positioned the kingdom as a potential mediator between the US-Israel axis and Iran, a role incompatible with joining a military coalition against Tehran [18].

Oman, which shares control of the strait's southern shore with Iran, has walked an even more delicate line. Reports of a draft memorandum of understanding that would have given Iran and Oman joint management authority over the strait prompted Trump to threaten Oman directly: "Oman will behave just like everybody else, or we will have to blow them up" [19]. The Trump administration called the MOU report "a complete fabrication" [19].

What "Breaking Iran's Grip" Would Require

The Trump administration's operational approach has shifted repeatedly. The initial posture was maximal: Trump ordered the Navy "to shoot and kill any boat" laying mines in the strait and directed minesweepers to operate "at a tripled up level" [20]. Operation Epic Fury, the broader US military campaign, conducted 1,450 strikes and destroyed over 90% of Iran's 8,000 naval mines and more than 85% of its ballistic missile, drone, and naval industrial base, according to CENTCOM commander Admiral Brad Cooper's Senate testimony [21].

Yet Cooper acknowledged a paradox: despite this destruction, Iran's "voice is very loud" and the merchant shipping and insurance industries continue to hear the threats clearly [21]. Iran's strategy was never purely about hardware. The IRGC closed the strait through a combination of mine-laying, swarm boat activity, selective missile strikes, and—critically—the credible threat of more [22]. Destroying 90% of the mines matters less if the remaining 10% (or the belief that more exist) keeps insurers from underwriting transits.

The administration has not publicly outlined a permanent freedom-of-navigation regime, preemptive strike doctrine against Iranian coastal batteries, or formal rules of engagement. Cooper told senators that Iran would need "a generation" to rebuild its navy and years to restore drone and missile production [21], but this assessment assumes no resupply from external partners and no adaptation of asymmetric tactics.

The Deterrence Debate

Some analysts argue that the campaign to eliminate Iran's Hormuz capabilities removes a stabilizing, if uncomfortable, feature of the regional order.

For over 40 years, Iran's "deterrence by denial" posture—its ability to threaten closure of the strait—served as a check on military action against Tehran [22]. The logic was straightforward: any attack on Iran risked a global energy crisis, giving major oil importers (especially China, India, Japan, and South Korea) a strong incentive to oppose escalation. By this analysis, Iran's Hormuz threat was the poor country's nuclear deterrent—crude but effective at raising the costs of conflict above what adversaries were willing to pay.

Andreas Krieg of King's College London has argued that Washington's acceptance of Iran's demand to sequence negotiations—Hormuz first, nuclear later—represents "a concession to Tehran" that acknowledges the limits of military force alone [23]. The Carnegie Endowment for International Peace has warned that neither the US nor Israel presented "a decisive solution for the de facto Iranian closure," leaving GCC economies "vulnerable to future disruptions without independent security mechanisms" [18].

The counter-argument, advanced by the Trump administration and hawkish analysts, holds that Iran's chokepoint leverage enabled decades of nuclear proliferation and proxy warfare without consequence. Removing that leverage, this view holds, forces Tehran into genuine negotiation rather than stalling tactics protected by the implicit threat of economic catastrophe.

Nuclear Talks and the Diplomacy-Force Tension

US-Iran negotiations, mediated by Pakistan, are running on a parallel track to the military campaign [24]. As of late May 2026, Trump declared a deal "largely negotiated" that would reopen the strait [25]. The framework reportedly allocates 30 days for Hormuz-related procedures and a 60-day window for nuclear talks [26].

But the two sides describe the agreement differently. Iran's Fars news agency reported the strait would remain "under Iran's management," dismissing Trump's characterization as "incomplete and inconsistent with reality" [25]. Secretary of State Marco Rubio called the military phase "concluded" and signaled a shift toward a memorandum of understanding [23].

The sequencing itself represents a shift in US position. Washington initially demanded simultaneous resolution of Hormuz access, nuclear disarmament, and sanctions relief. A 15-point March proposal required dismantling enrichment facilities at Natanz, Isfahan, and Fordow [23]. Iran rejected this, insisting on resolving the war and Hormuz access before discussing its nuclear program. The US has now largely accepted this sequencing [23].

Critics of the military-pressure approach—including European foreign ministries that joined the UK-France coalition—have cautioned that sustained confrontation over Hormuz could collapse diplomatic channels. Multiple converging deadlines shaped the May negotiations: a Trump-Xi summit on May 14-15, the approaching Hajj pilgrimage on May 25, and fraying ceasefire tensions [23]. Iran's enriched uranium, buried underground and largely unaddressed in framework discussions, remains the central unresolved issue [23].

The Road Ahead

The Czech Republic's pledge, while small in military terms, reflects a broader pattern: the Hormuz crisis has drawn in countries far beyond the Gulf region, from landlocked Central European states to Pacific allies. The UK-France coalition's 40-plus member roster suggests widespread diplomatic support for reopening the strait.

But diplomatic support and operational capability are different things. The coalition has yet to conduct a single escorted transit. The US operation that did attempt one lasted two days. Insurance markets remain frozen. And the fundamental question—whether "breaking Iran's grip" means permanent multinational naval patrols, a negotiated freedom-of-navigation regime, or simply destroying enough Iranian military infrastructure to change Tehran's risk calculus—remains unanswered.

What is clear is the cost of the current impasse. With oil prices above $112 per barrel, 1,600 ships stranded, and a quarter of global seaborne oil trade disrupted, the Strait of Hormuz crisis has already become the most significant threat to global energy security in decades. Whether the coalition assembling to address it can match its rhetoric with results will determine not just the fate of the strait, but the shape of the post-war Middle Eastern order.