This is opinion under examination, a stated intention rather than a claim we rate true or false. What can be rated is the surrounding record: what the strait is, who may claim what there, and what a lawyer cited in the reporting says annexation would amount to.
The words first. Trump said, "After we finish defeating Iran, which is being very badly defeated, pretty soon I'll be declaring the Hormuz Strait a territory of the United States" [1]. He went on: "Essentially, that's what it is. We have the blockade. No ships get through unless we want them to" [1]. Note the tense. The declaration is something he says he will do, not something he has done, a distinction that matters against the way the statement is now circulating.
Take the strongest reading of the claim before setting the record beside it. A great power that has projected naval force into a chokepoint can, as a matter of raw capability, interdict traffic; "we have the blockade" is a statement about ships and firepower, and on that narrow point a military can physically stop vessels. Control by force, though, is a different thing from title under law, and the reporting is precise about the second.
The strait, Al Jazeera's explainer states, "is in international waters, sandwiched between the coasts of Iran and Oman" [1]. The United States is not one of those coasts. At its narrowest the passage is "only about 21 nautical miles (39km) wide," and a coastal state may claim a territorial sea of up to "12 nautical miles (22km)" [1]. Because the two shores are Iran's and Oman's, it is those states, not a third country, whose territorial waters can reach into the strait at all.
The rules that govern passage there are not a matter of one nation's preference. The UN Convention on the Law of the Sea provisions on international straits are "widely regarded as customary law," ships "enjoy a right of passage that 'shall not be impeded,'" [1]. A declaration that no ships get through "unless we want them to" is a description of exactly the impediment the law says these transit lanes must never face.
Bruce Fein, described as an associate deputy attorney general under President Ronald Reagan, put the legal weight plainly. An annexation, he said, would "constitute the crime of aggressive war under international law, including the UN Charter" [1]. That is one lawyer's reading, cited in the reporting, and it is offered here as his assessment, not as a verdict this desk issues.
One thing does need correcting, because it travels as fact. Some online accounts have already asserted that the strait has been annexed. It has not. The statement is future-tense intent, and the geography and the law it would run into have not moved. Our flagship desk tracks the underlying standoff separately in its coverage of the Iran deadline and the Oman channel [callback: pp_20260819_mark_iran_deadline_oman].
The honest summary is short. Trump says he will make the strait American territory. The strait is international water between two other countries, the passage through it is protected by rules no single state may suspend, and a lawyer cited in the account calls the contemplated act a crime of aggression. The claim and the record are both on the table, side by side.
