# Strait of Hormuz The Strait of Hormuz is a narrow waterway between Iran and Oman that connects the Persian Gulf to the Gulf of Oman and the Arabian Sea. It is the single most important oil-transit chokepoint in the world: roughly 20 million barrels per day passed through it in early 2025 — about a fifth of global petroleum consumption and roughly a quarter of all seaborne oil trade, the great majority bound for Asian markets. ## Strategic significance Because so much of the world's oil and a large share of its liquefied natural gas and fertilizer feedstock move through the strait, any credible threat to close or tax it gives Iran outsized leverage over global energy prices. This is the core reason successive U.S. presidents pursued negotiation with Iran rather than open conflict — the chokepoint converts a regional confrontation into a potential global economic shock. ## The other gate Hormuz is the northern of two chokepoints that bracket the Arabian Peninsula. The southern one is the [[Bab el-Mandeb]], the strait between Yemen and the Horn of Africa that is the only sea entrance to the Red Sea and therefore the southern gate on the Suez route. On **September 10–11, 2026** the [[Houthis]] seized Mocha, Zuqar Island and Perim Island, taking the whole Yemeni side of that strait. With Hormuz already largely closed, Iran-aligned forces came to sit astride both corridors, which together carry more than a quarter of the world's seaborne crude and petroleum trade — and Saudi Arabia's remaining seagoing export route, which ran north through the Red Sea, was the specific thing the September offensive threatened. See [[Bab el-Mandeb]] and [[Iran War 2026 Timeline]]. ## Role in the Iran War 2026 The strait was central to the strategic logic and the outcome of the [[Iran War 2026]]. So long as Iranian leaders could credibly threaten passage through it, they could throttle a fifth of the world's oil supply, "plunging the globe into crisis." [[Donald Trump]] reportedly invoked the fear of triggering an "economic catastrophe" — twice comparing himself to Herbert Hoover at the G7 — as a reason to wind the war down. The [[Trump-Iran MOU 2026]] reflected this leverage directly: Iran committed only to "best efforts" for safe passage, with no transit charge "for 60 days only," while Iran and Oman were left to "define the future administration and maritime services" of the strait — widely read as a signal that Iran intends to charge transit fees going forward. Critics noted the strait had been open before the war began, making its reopening a restoration of the status quo rather than a U.S. gain. ## Aftermath: the chokepoint keeps biting (July 2026) Weeks after the [[Trump-Iran MOU 2026]], the strait remained a live economic weapon. On July 3, 2026, after U.S. Central Command said regional leaders were committed to the "free flow of commerce," Iran's military command warned that ships crossing on **unapproved routes** would meet a "forceful response." The U.S. had been urging vessels onto a route close to Oman; Iran's warning caused ships to turn around. Because roughly 20% of the world's seaborne oil had flowed through the strait until Trump's attack on Iran, the disruption pushed U.S. inflation back above 4% — the backdrop for new Fed chair [[Kevin Warsh]]'s July 1 warning that "prices are too high." The strait is also a fertilizer chokepoint: about one-third of the world's sea-transported fertilizer moves through it, and the shutdown hit farmers worldwide during planting season, including in the U.S., where an April American Farm Bureau Federation survey found 70% of respondents could not afford all the fertilizer they needed. NPR reported the resulting price spikes as one driver of higher U.S. food prices expected in fall 2026. Days later the chokepoint became the stated rationale for reopening the war. On the evening of July 7, 2026, the U.S. resumed strikes on Iran — hitting more than 80 targets and reimposing oil sanctions — explicitly to "further degrade" Iran's "ability to threaten freedom of navigation in the Strait of Hormuz." Iran retaliated on July 8 against U.S. facilities in [[Bahrain]] and [[Kuwait]]. Oil prices spiked over the day even as [[Donald Trump]], speaking at the [[NATO Summit Ankara 2026]], claimed "we have the Hormuz Strait" and that oil would flow freely — a claim Tom Nichols rejected in *The Atlantic*, noting Iran, not the U.S., controls the waterway. See [[Iran War 2026 Timeline]] for the resumption chronology. By mid-July the claim had fully inverted. As Iran attacked vessels near the Oman shoreline, its **Navy declared the strait closed** "until the end of U.S. interference in the region," and Trump ordered new airstrikes. On **July 12, 2026**, the *New York Times* reported that the [[Trump-Iran MOU 2026]] had **formalized Iran's control** of the strait: former U.S. officials said Iran read the MOU's "best efforts" safe-passage clause as authority over the waterway, and called the agreement dangerously vague. The chokepoint the administration had claimed as a spoil of war had become, on paper, Iran's to administer. ## See Also - [[Iran War 2026]] - [[Iran War 2026 Timeline]] - [[NATO Summit Ankara 2026]] - [[Trump-Iran MOU 2026]] - [[Kevin Warsh]] — Fed chair citing the resulting inflation - [[JCPOA]]