CS Anthem’s Hormuz Exit Shows the Limits of U.S. Power
A second U.S.-flagged ship has left Hormuz under escort, but traffic remains stalled and Iran still holds the choke point.
The U.S. is proving it can move isolated vessels, not reopen the waterway. Reuters said the chemical tanker CS Anthem was the second U.S.-flagged merchant ship to exit the Strait of Hormuz under U.S. military protection, following the Alliance Fairfax a day earlier. But the same Reuters reporting said most commercial traffic remained at a standstill, with no tanker queue building and shipping groups still warning that passage is effectively impossible without a credible security guarantee. 
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What Washington is trying to signal
This is not just a convoy story. It is a test of coercive leverage. The Trump administration has said its aim is to restore “freedom of navigation” through a chokepoint that handles about 20% of global oil and LNG flows; Reuters reported the U.S. was also drafting a U.N. Security Council resolution with Gulf Arab partners to condemn Iran’s actions and press it to stop attacks, toll demands and mine-laying. That gives Washington a diplomatic lane as well as a military one, but both are constrained by the same fact: Iran still dictates the risk calculus inside the strait. Reuters Reuters
For now, Iran is still winning the asymmetry. It does not need to sink many ships to freeze traffic; Reuters reported that hundreds of vessels and about 20,000 seafarers had already been trapped by the disruption, while the Joint Maritime Information Center kept the threat level “critical.” That is why even a successful escorted transit matters less than the broader absence of normal commercial movement. Reuters 
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Who gains, who loses
The immediate beneficiaries are the White House, U.S. Central Command and Gulf governments that want the crisis framed as an international navigation issue, not a bilateral U.S.-Iran fight. The losers are shipping firms, insurers and Asian energy importers that still cannot price the route with confidence. Reuters has already documented war-risk premiums rising sharply and carriers such as Hapag-Lloyd saying transit remains blocked by lack of clear procedures. For readers tracking the wider balance of power, this is the kind of contest that sits between 
Global Politics and International Relations: force may escort a ship through, but only politics can reopen the market. Reuters Reuters
What to watch next
The next real test is not another escorted sailing; it is whether commercial carriers without U.S. protection start moving before the Security Council debate this week. If they do not, the Strait remains a military corridor, not a commercial one. If they do, Washington can claim momentum; if Iran disrupts another transit, the pressure shifts back to sanctions, naval escalation and insurance markets.
