The Strait of Hormuz, a narrow chokepoint through which nearly a fifth of the world’s oil passes, has become a tense flashpoint in global geopolitics. Recent disruptions of merchant traffic by Iran have reignited fears that any attempt to ensure free navigation could turn the waterway into a battlefield. The US is currently hesitant to act unilaterally, seeking instead to assemble a coalition of nations to secure the strait. While it may appear an ironic spectacle of the world’s biggest navy shying away from a small operation, there is a deeper strategic reason — Iran may be intentionally crafting a lethal trap for the US Navy, and Iran is just waiting for the US Navy to make a rash decision.
Iran’s asymmetric advantage
A 2009 research paper by Colin Karl Boynton for the US Naval War College, titled ‘Operations to Defeat Iranian Maritime Trade Interdiction’, argued that Iran’s strength lies not in conventional naval power but in asymmetric tactics. The Strait of Hormuz is only about 21 miles wide at its narrowest point, leaving little room for large warships to maneuver. Boynton highlighted that while Iran cannot afford to keep the strait closed for long — it depends on it to export its own oil — its forces could exploit a temporary US military presence to maximize damage. Using fast attack boats, drones, and shore-based missiles, Iran could effectively box US ships into a kill zone where traditional advantages such as firepower and technology are neutralized.
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The strategy is to provoke a US response that forces warships into the strait, then exploit the confined geography and asymmetric capabilities to inflict disproportionate losses. The narrow waters, combined with Iran’s coastal defenses and mobile missile units, create a scenario in which US forces could be vulnerable to sudden, highly coordinated strikes.
“At the strategic level then, Iran seems to recognize that threatening maritime trade in the Strait of Hormuz may provoke a rash U.S. counteraction,” Boynton argued in his paper. “Tehran appears to believe that the U.S. Navy will come rushing to the rescue of merchant traffic endangered in the Strait (like the U.S. response in the Tanker Wars) and thus be lured into the one area in which Iranian naval forces are most advantaged and lethal. This will allow for tactical successes unprecedented in recent history for smaller nations fighting the U.S. military.”The Iranian strategy described by Boynton appears particularly prescient in the current context. By disrupting shipping and creating uncertainty, Iran tests the resolve of the US and its allies. The strategy is not to close the strait permanently, which would be self-defeating, but to create conditions where the US Navy might feel compelled to act, thereby walking into a zone of maximum vulnerability.
The 2009 paper suggested that Iran could use the US Navy’s operational doctrines against it. Concentrating ships in a narrow corridor reduces maneuvering space, complicates defensive formations, and makes them easier targets for Iran’s swarm tactics. Modern developments, including advanced drones and precision missile systems, have only amplified these asymmetric advantages, validating Boynton’s concerns in the present-day scenario.
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US hesitancy is a strategic restraint
A recent WSJ report confirms that the US Navy is acutely aware of this trap. Analysts describe the strait as potentially turning into a “kill box,” a confined area in which US ships could face simultaneous attacks from multiple directions. The presence of Iranian drones, fast attack boats, and anti-ship missiles multiplies the risk. Given this reality, the US has refrained from directly escorting merchant vessels through the strait, instead calling on allied nations to participate in securing freedom of navigation.
President Donald Trump has publicly urged other countries to send warships, emphasizing collective responsibility. However, reports suggest that few countries have stepped forward to actively patrol the strait, leaving the US in a diplomatic bind. Any unilateral action risks exposing American sailors to a carefully prepared battlefield designed by Iran.
The global stakes are immense. A long-term disruption to oil flows through the Strait of Hormuz could roil global economy. Yet the US strategy has been cautious, prioritising coalition-building over immediate intervention. But securing shipping through the strait presents not only military challenges but also diplomatic and operational ones, as multiple states must coordinate across international law, territorial waters and threat assessments.
The situation illustrates the delicate balance the US must strike by ensuring free passage of oil tankers without falling into a trap meticulously prepared by Iran. Acting hastily risks casualties and escalation, while inaction allows Iran to wield influence over global oil markets and reinforce its narrative of resistance against Western powers.
Iran’s anti-access/area-denial strategy in the Strait of Hormuz is not a crude blockade but a sophisticated attempt to create a kill box for superior naval forces. As Boynton warned over a decade ago, the narrow strait, Iran’s asymmetric capabilities and American operational vulnerabilities make the waters perilous for any unilateral military intervention.
