After Trump shifted toward economic warfare against Iran, why did the U.S. military suddenly target Iranian oil tankers?

The third empty tanker, the M/T Kylo (also known as the Noksan), was completely destroyed in the Gulf of Oman—U.S. forces first ordered the crew to abandon ship, then struck multiple critical areas, rendering it fully inoperable. U.S. Central Command stated outright that these three tankers belonged to a multi-billion-dollar 'shadow network' specifically designed to fund Iran’s Islamic Revolutionary Guard Corps (IRGC) and its regional proxies. Iranian media previously reported that one tanker had been hit by four missiles near Kharg Island. General Brad Cooper, Commander of U.S. Central Command, issued a blunt warning: 'The message to the IRGC is clear—if you fire on our two warships, we will exact a far higher economic price: sinking your three vessels.' General Cooper also warned: 'We will not hesitate to defend U.S. forces—and if necessary, we will destroy Iran’s limited and exposed oil fleet.' II. The Logic of Economic Warfare: Targeting Tankers Is More Cost-Effective Than Striking Military Targets This attack may appear to be a military reprisal, but it is in fact a meticulously calculated economic strike. To understand why the U.S. military suddenly targeted oil tankers, one must first grasp Trump’s strategic pivot. Why shift from military strikes to economic strangulation? After six months of conflict, military means have failed to topple Iran—instead, they have driven up global oil prices, including domestic U.S. fuel prices. Trump himself previously dismissed the conflict as 'a very small thing.' Since military pressure has proven ineffective, the administration has turned to attacking Iran’s purse strings—and the IRGC’s purse strings are oil. San Lang believes the most crucial change lies in the evolving U.S. strategic thinking toward Iran. In the past, the U.S. relied primarily on financial sanctions, oil embargoes, and secondary sanctions to prevent Iran from selling oil normally. Yet Iran found workarounds: deploying a 'shadow fleet,' changing vessel flags, disabling automatic identification systems (AIS), and conducting ship-to-ship transfers—effectively smuggling oil out of the country. The problem is that sanctions can only raise the cost of Iran’s oil exports—not reliably stop them altogether. Now the U.S. has clearly adopted a new approach: If you profit from tankers, then your tankers will no longer be able to operate safely. In late July, the U.S. Treasury Department began targeting Iran-linked shipping, insurance, and the 'shadow fleet' operating around the Strait of Hormuz, accusing the IRGC of financing itself through this maritime system. On August 19, Trump announced an 'unprecedented' economic war against Iran, warning all countries to cease assisting Iran with oil transactions, fund transfers, or sanctions evasion. On August 24, Treasury Secretary Bessent expanded sanctions to five sectors—aviation, shipping, digital assets, gold, and technology—blacklisting nearly 60 Iranian entities and individuals. Bessent vowed to sever 'every single economic lifeline' of Iran. By September, military force began direct intervention. On September 1, the U.S. launched its first so-called 'tanker-for-tanker' retaliation, striking two Iranian government-owned tankers. According to U.S. officials speaking to Axios, the policy’s explicit aim was to signal to Iran: if Iran attacks commercial vessels transiting the Strait of Hormuz, the U.S. reserves the right to directly strike Iran’s oil transport fleet. Thus, the September 5 incident was not isolated—it formed part of a continuous escalation. Financial sanctions constitute the first layer; naval interdiction the second; and direct strikes on tankers the third.

Twenty-One Delusions About a U.S. War Against Iran

Is the Saudi-led coalition useful? I believe it is not. First, neither Pakistan nor Turkey stands to gain from war. Among Saudi Arabia’s coalition partners, only Pakistan and Turkey possess meaningful military capability—but both lack core conflicts with Iran. Moreover, their interests are only marginally affected by this conflict—certainly not enough to justify launching a war. Even if Pakistan and Turkey were to attack and defeat Iran, neither the U.S. nor Israel would permit any other country to seize Iran’s oil resources or strategic geography. Second, Pakistan and Turkey would likely bear the entire war cost themselves. First, the U.S. lacks the funds—and Congress would never approve payments—to finance third-party militaries. America’s own defense budget is already under severe strain. Second, should full-scale war erupt, Iran would likely strike oil infrastructure across the Middle East. At that point, Saudi Arabia would be unable to cover the costs—even if Iran ultimately lost the war, it would be incapable of paying reparations. Third, the coalition might attempt to shift costs onto the global economy—but such cost-shifting presumes victory over Iran. As noted above, even if Iran were defeated, its retaliatory strikes would have already devastated regional oil infrastructure. Reconstruction would take at least a decade.

Middle East Oil Chiefs Warn World Must Share Iran Conflict Costs

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Saudi Aramco and Kuwait Petroleum CEOs warned that global partners must fund infrastructure repairs and storage following war damage to oil assets. They emphasized critical supply shortages and called for collective investment to maintain energy security amid ongoing conflict disruptions.

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