Iran Strait of Hormuz Threat Escalated Under Trump, War Game Warnings Unheeded

Over the past two decades, Iran repeatedly threatened to close down the waterway. President Trump underestimated Iran’s ability to do so.

Strategic Waterway at Risk

The Strait of Hormuz, a narrow passage connecting the Persian Gulf to the open ocean, has long been a flashpoint in global maritime security. As the primary oil shipping choke point, roughly 20% of the world’s petroleum transits this channel daily. Iran’s repeated threats to blockade the strait have drawn concern from naval strategists and energy markets alike, particularly given the Islamic Republic’s investment in asymmetric naval capabilities designed to disrupt commercial traffic.

Iranian Naval Capabilities and Blockade Doctrine

Tehran’s naval forces—both the regular navy and the Islamic Revolutionary Guard Corps—have developed a layered defense strategy around the Strait of Hormuz. This includes swarms of fast-attack craft, anti-ship cruise missiles, naval mines, and shore-based artillery. War games conducted by the United States and allied navies have consistently highlighted the vulnerability of large tankers to such tactics. Despite these warnings, the Trump administration’s strategy toward Iran focused on maximum economic pressure rather than robust naval deterrence, leaving the waterway’s security in a precarious position.

Trump Administration Strategy and Its Consequences

President Donald Trump’s approach to Iran prioritized sanctions and diplomatic isolation over military readiness in the Gulf. His administration withdrew from the 2015 nuclear deal and reimposed crippling economic penalties, but did not allocate additional resources to counter Iranian naval threats. War game simulations run by the Pentagon reportedly concluded that Iran could, for a limited period, successfully disrupt shipping through the Strait of Hormuz. These findings were presented to senior officials, yet the administration did not adjust its force posture or public messaging accordingly. Critics argue that this underestimation of Iranian capabilities emboldened Tehran to escalate its rhetoric and operational readiness.

Maritime Security and Global Energy Implications

A blockade of the Strait of Hormuz would have immediate and severe consequences for global oil prices and supply chains. Major importers in Asia, Europe, and the United States rely on the strait’s free passage. The Persian Gulf blockade scenario remains one of the most feared contingencies in energy markets. During Trump’s tenure, Iran’s leadership repeatedly threatened to mine the strait or launch missile attacks against commercial vessels. These threats were dismissed by some in Washington as bluff, but after-action reviews and intelligence assessments later confirmed that Iran had pre-positioned assets capable of executing such operations.

Context: Similar tensions arose in 2019 when Iran seized several oil tankers in the Gulf of Oman and the Strait of Hormuz, prompting the United States to form a multinational maritime security coalition. In 2021, the Iranian navy conducted large-scale exercises simulating the closure of the waterway, further underscoring the persistent nature of the threat.