What Happened
- US President Trump's approach to the Strait of Hormuz has undergone a series of contradictory shifts within a single week, raising questions about coherence in US war strategy against Iran.
- Trump initially called for a new international coalition to send warships to secure the strait diplomatically — allies declined to join.
- He then suggested the US could manage alone, then indicated other countries should take responsibility, then suggested the waterway would somehow "open itself."
- On 21 March 2026, Trump issued a 48-hour ultimatum: open the strait or the US would "obliterate" Iran's power plants — Iran responded by threatening complete closure.
- In a separate move, Trump's Treasury Department lifted sanctions on some Iranian oil for the first time in decades, sending contradictory signals about US leverage strategy.
- Legal experts noted that widespread attacks on civilian power infrastructure would likely constitute war crimes under international humanitarian law, creating a dilemma for the US military chain of command.
Static Topic Bridges
The JCPOA and US Sanctions on Iran — History and Architecture
The Joint Comprehensive Plan of Action (JCPOA), signed in Vienna on 14 July 2015, was a nuclear agreement between Iran and the P5+1 (US, UK, France, Russia, China, plus Germany) and the European Union. It aimed to limit Iran's nuclear enrichment capabilities in exchange for sanctions relief.
- Iran agreed to reduce its enriched uranium stockpile by 97% (from ~10,000 kg to 300 kg), cap enrichment at 3.67%, and accept IAEA inspections.
- In exchange, the US, EU, and UN lifted nuclear-related economic sanctions.
- Trump (first term) withdrew the US from JCPOA on 8 May 2018, reimposing "maximum pressure" sanctions — including on Iranian oil exports.
- Biden rejoined negotiations (JCPOA revival talks) but a deal was not finalized before the 2024 election.
- Trump (second term) initially maintained maximum pressure sanctions but has now lifted some Iranian oil sanctions in early 2026 — a reversal aimed at increasing global oil supply and softening prices during the conflict.
- US sanctions on Iranian oil had reduced Iranian exports from ~2.5 mb/d (pre-2018) to ~1.5 mb/d by 2023.
Connection to this news: The partial lifting of Iranian oil sanctions — while simultaneously threatening to bomb Iran's power plants — epitomizes the contradictory nature of US strategy. Sanctions are being relaxed precisely when they would have maximum leverage, undermining the traditional US tool of economic coercion.
US Military Doctrine and Rules of Engagement — Civilian Infrastructure Attacks
Under US military doctrine and international law, combatants must distinguish between military objectives and civilian objects. The principle of distinction (a cornerstone of international humanitarian law) prohibits targeting civilian infrastructure unless it makes an effective contribution to military action and its destruction offers a definite military advantage.
- Additional Protocol I (1977) to the Geneva Conventions — which the US has not ratified but which is widely accepted as customary international law — prohibits attacks on objects "indispensable to the survival of the civilian population" (Article 54) and on installations containing dangerous forces such as nuclear power plants (Article 56).
- The Uniform Code of Military Justice (UCMJ) — the US military legal framework — requires officers to refuse manifestly illegal orders.
- In the Nuremberg Principles (1950), "following orders" is not a defense for war crimes.
- Attacks on Iran's national electricity grid would likely be characterized as targeting civilian infrastructure, given power plants serve civilian populations.
- The ICC's Rome Statute (Article 8) defines intentional attacks on civilian objects as war crimes; however, the US is not a signatory to the Rome Statute (withdrew signature in 2002 under Bush administration).
Connection to this news: Trump's power plant threat placed US military commanders in a potential dilemma — execute an order that may constitute a war crime, or refuse and face UCMJ action for insubordination. This structural tension is part of what raised "questions about US war preparation" in the strategic analysis.
US "Freedom of Navigation" Doctrine and Maritime Strategy
The United States has historically maintained that all nations have the right to freedom of navigation in international waters, including straits used for international navigation. The 1982 United Nations Convention on the Law of the Sea (UNCLOS) codifies this under "transit passage" for international straits.
- UNCLOS Article 38: Ships and aircraft of all states enjoy the right of "transit passage" through international straits — this passage cannot be suspended.
- The Strait of Hormuz qualifies as an international strait under UNCLOS because it connects one part of the high seas to another and is used for international navigation.
- Iran has ratified UNCLOS; it has historically disputed the breadth of transit passage rights in the strait.
- The US Navy has maintained a presence in the Persian Gulf since the 1980s (including through the 1988 Operation Praying Mantis — a direct naval clash with Iran) to ensure freedom of navigation.
- Operation Earnest Will (1987-88): The US re-flagged Kuwaiti tankers during the Iran-Iraq War to protect them from Iranian attacks — a precedent for US naval intervention to protect Hormuz shipping.
- Trump's call for a coalition to "send warships" to the strait was broadly consistent with the freedom of navigation doctrine, but coalition partners were unwilling to escalate militarily.
Connection to this news: The US response to Hormuz closure has oscillated between invoking the established freedom of navigation doctrine (coalition warships), unilateral military threats (bombing power plants), and economic concessions (sanctions relief) — none of which constitute a coherent strategic approach, raising legitimate concerns about the depth of US war planning.
Iran's IRGC and Asymmetric Maritime Warfare
The Islamic Revolutionary Guard Corps Navy (IRGCN) is a separate naval force from the Islamic Republic of Iran Navy (IRIN) and is responsible for Persian Gulf operations, including enforcing Hormuz closures. The IRGC is designated as a Foreign Terrorist Organization by the US since 2019.
- IRGCN uses asymmetric tactics: fast attack boats (swarm tactics), anti-ship missiles, sea mines, and drone boats — designed to threaten large naval vessels at low cost.
- Iran has repeatedly threatened and practiced simulated closure of the strait (most notably in 2012 and 2019 crises).
- IRGCN controls the northern chokepoint of the strait from the Iranian coastline.
- Iran has placed mines and seized vessels in the strait as pressure tactics (IRGCN seized MT Stena Impero, UK-flagged tanker, in July 2019).
- In the 2026 conflict, the IRGCN has effectively deterred tanker passage through a combination of physical attacks and credible threat of missile strikes on vessels.
Connection to this news: The IRGCN's asymmetric capabilities mean that conventional US naval power — while vastly superior in aggregate — cannot easily guarantee safe tanker passage against a determined adversary using mines, swarm boats, and shore-based anti-ship missiles in a narrow chokepoint. This partly explains the failure of Trump's coalition-building approach for strait security.
Key Facts & Data
- JCPOA signed: 14 July 2015 (Vienna), between Iran and P5+1 + EU
- US withdrawal from JCPOA: 8 May 2018 (Trump's first term)
- Strait of Hormuz UNCLOS status: International strait — transit passage right applies (Article 38)
- Iran's enrichment under JCPOA: capped at 3.67%; stockpile capped at 300 kg (down from 10,000 kg)
- US sanctions on Iranian oil lifted (partially): March 2026 — first time in decades
- Trump's ultimatum: 48 hours to open strait or power plants would be "obliterated"
- Iran's counter-threat: Complete closure of strait + destruction of regional energy and water infrastructure
- US Rome Statute status: Non-signatory (withdrew signature, 2002)
- IRGC designated FTO by US: April 2019
- Operation Earnest Will (1987-88): US re-flagged Kuwaiti tankers to protect Hormuz shipping