The assertion by former President Donald Trump regarding a “blockade” of the Strait of Hormuz by the United States referred to a robust campaign of economic pressure and sanctions, rather than a conventional military blockade. Historically, a military blockade is an act of war involving naval forces physically preventing vessels from entering or leaving ports or coastlines. The US strategy, particularly under the Trump administration, involved a “maximum pressure” campaign designed to severely restrict Iran’s ability to export oil and engage in international trade, thereby compelling changes in its policies regarding its nuclear program, ballistic missile development, and regional activities.
In practice, this policy manifested through a series of sweeping economic sanctions. Key among these were secondary sanctions targeting countries and entities that continued to purchase Iranian oil, effectively aiming to cut off Iran’s primary source of revenue. The United States also imposed restrictions on Iran’s banking sector, shipping, and other critical industries, making it exceedingly difficult for Iran to conduct international financial transactions or import essential goods. While a significant US naval presence is maintained in the Persian Gulf and around the Strait of Hormuz, its role in this context primarily involved monitoring, deterring potential Iranian aggression, and enforcing existing sanctions by identifying and, where legally permissible, interdicting vessels attempting to circumvent restrictions, rather than a blanket military interdiction of all shipping to Iran.
The Strait of Hormuz, a vital maritime chokepoint through which a significant portion of the world’s seaborne oil passes, became central to this pressure campaign due to Iran’s reliance on it for oil exports. Although US military assets were present to ensure freedom of navigation and deter any Iranian attempts to disrupt shipping, the “blockade” effect described by Trump stemmed from the severe economic penalties imposed on any entity facilitating sanctioned trade with Iran, especially its oil exports. This comprehensive economic isolation aimed to dry up Iran’s foreign currency reserves, cripple its economy, and limit its funding for regional proxy groups, without resorting to direct military confrontation that a traditional blockade would entail. The practical implications for Iran included severe economic hardship, diminished oil revenues, and increased difficulty in accessing global markets for both imports and exports.
