U.S. threatens Hormuz blockade
The U.S. has threatened to blockade Iranian ports via the Strait of Hormuz, but NATO allies said they would not join the plan, creating a visible split with Washington. (reuters.com). Analysts describe any attempt to block Iranian ports as highly escalatory and legally and operationally complex, while China called the proposal “dangerous” as Iran-linked ships continued transits through the strait. (theguardian.com) (nbcnews.com). Japan has moved to host 30 NATO envoys as allies debate how to respond if the United States proves unreliable on regional security commitments. (scmp.com)
The United States has threatened to stop ships reaching Iranian ports through the Strait of Hormuz, and its North Atlantic Treaty Organization allies have refused to take part. (reuters.com) Reuters reported on April 13 that Britain, France and other allies told Washington they would not join the operation. President Donald Trump said the United States military would work with other countries to block maritime traffic to and from Iran. (reuters.com) A blockade at sea means warships try to stop vessels from entering or leaving a coast. Under the San Remo Manual, a commonly cited guide to the law of naval war, a blockade has to be declared, notified and made effective in practice. (ihl-databases.icrc.org) The waterway at the center of the fight is one of the world’s main energy chokepoints. The United States Energy Information Administration said about 20 million barrels a day moved through Hormuz in 2024, equal to about one-fifth of global petroleum liquids consumption. (eia.gov) That helps explain why allies are resisting. Reuters said France proposed a conference on restoring freedom of navigation after fighting ends, while Britain said it would not be drawn into the war and Turkey called for diplomacy to reopen the strait. (reuters.com) Analysts told The Guardian that trying to seal off Iranian ports would be legally and operationally difficult because the strait is narrow, crowded and used by neutral shipping as well as Iranian traffic. The same report said any attempt to enforce a blockade against all Iran-linked shipping would risk widening the conflict. (theguardian.com) China publicly pushed back on April 14. NBC News reported that Beijing called the plan “dangerous” even as Iran-linked ships continued transits through Hormuz, showing that traffic had not been fully cut off. (nbcnews.com) The split is also spilling beyond the Gulf. The South China Morning Post reported that Japan is preparing to host 30 North Atlantic Treaty Organization envoys this month as allies compare notes on how to manage security ties if Washington becomes a less reliable partner. (scmp.com) For now, the immediate question is not only whether the United States can enforce a blockade, but whether it can do so without the allies it usually relies on for naval legitimacy and political cover. (reuters.com)
