For months, the Strait of Hormuz war has settled into an uneasy, costly stalemate. Iran has not succeeded in fully shutting the waterway, with U.S. forces escorting some tankers through. But Washington has also failed to restore normal shipping: Iranian attacks on commercial vessels have kept traffic suppressed and oil prices elevated.¹

Earlier this week, Tehran widened its campaign by firing missiles at U.S. bases around the Persian Gulf. Then, on Saturday, it targeted a U.S. aircraft carrier and a destroyer—an attempted leap from harassing commercial traffic to confronting the force enforcing the blockade.

The U.S. response was economic as much as military. American forces struck three Iranian oil tankers said to belong to the “shadow network” financing the Islamic Revolutionary Guard Corps. Adm. Brad Cooper, the head of U.S. Central Command, framed the retaliation as a deterrent: “If you shoot at two of our ships, we will impose an even higher economic cost — taking out three of yours.” He added that the United States would defend its forces and, if needed, destroy Iran’s “limited and exposed oil fleet.”¹

For Washington, the exchange is meant to demonstrate that attacks on its ships will bring a price Tehran cannot afford. Yet Hamidreza Azizi of the International Crisis Group argues that the attempted strikes themselves mark a more perilous threshold. Direct Iranian attacks had previously been confined to Gulf bases; going after warships enforcing the blockade changes the calculus, he said. “The attempt failed, but there is no reason to assume the next one will.”¹

That warning cuts against the logic of ever-tightening pressure. U.S. sanctions and the naval squeeze may be eroding Iran’s economy, but Azizi contends they could also sharpen Tehran’s incentive to gamble. “The greater the squeeze on Iran, the greater the incentive to act,” he wrote.¹ A successful strike causing major U.S. casualties, he warned, could rapidly transform the conflict.