Battle of wills: On the U.S. war on Iran

A deepening US-Iran standoff has resulted in a de facto closure of the Strait of Hormuz, one of the world's most critical energy chokepoints, following milit...

What Happened

A deepening US-Iran standoff has resulted in a de facto closure of the Strait of Hormuz, one of the world's most critical energy chokepoints, following military strikes and a retaliatory Iranian declaration shutting the waterway to commercial shipping.
The US imposed a naval blockade on Iranian ports beginning April 2026, while Iran declared the Strait of Hormuz "closed," resulting in a dual-blockade situation that has sent global oil prices to multi-year highs — with Brent crude surpassing $115 per barrel.
Iran has offered to reopen the strait and end the conflict in exchange for the lifting of the US naval blockade, while deferring nuclear negotiations to a separate track; the US has conditioned any arrangement on verifiable nuclear concessions, viewing the strait as its primary leverage.
The crisis has triggered significant economic disruption globally, with Iran reportedly losing approximately $500 million per day in oil export revenues, and global fuel prices rising sharply.

Static Topic Bridges

Strait of Hormuz — Geography and Strategic Significance

The Strait of Hormuz is a narrow waterway located between the Musandam Peninsula (Oman and the UAE) to the south and Iran to the north, connecting the Persian Gulf to the Gulf of Oman and the Arabian Sea. At its narrowest point, it is approximately 33–39 km (21 nautical miles) wide, with only two navigable shipping lanes of 3.2 km each and a median separating zone. It is the world's most important oil chokepoint: approximately 20–21% of global oil supply and a significant share of liquefied natural gas (LNG) passes through it daily. Any closure or disruption of the strait immediately affects global energy markets, particularly for oil-dependent economies in Asia, including Japan, China, South Korea, and India.

Location: between Iran (north) and Oman/UAE (south); connects Persian Gulf to Gulf of Oman.
Width at narrowest point: approximately 33–39 km (about 21 nautical miles).
Approximately 20–21% of globally traded oil transits through the strait daily (pre-crisis estimate: ~17–20 million barrels per day).
Nations with greatest exposure: China, Japan, South Korea, India, and European importers.
Alternative routes to bypass Hormuz: Trans-Arabian Pipeline (TAPLINE, largely defunct), the Abqaiq-Yanbu pipeline (Saudi Arabia), and Abu Dhabi Crude Oil Pipeline — all with limited combined capacity.
The strait passes through the territorial waters of Iran and Oman; there is no high-seas corridor.

Connection to this news: The Iranian declaration of closure directly weaponises the strait's geographical chokehold; no alternative route can fully replace Hormuz-transiting volumes, making the standoff a global energy security crisis.

UNCLOS and the Right of Transit Passage Through International Straits

The United Nations Convention on the Law of the Sea (UNCLOS), adopted in 1982 and entered into force in 1994, establishes the international legal framework governing navigation, maritime zones, and straits. Part III of UNCLOS (Articles 34–45) specifically addresses "Straits used for international navigation." Article 37 defines straits to which the transit passage regime applies — those connecting one part of the high seas or EEZ to another. Article 38 establishes that all ships and aircraft have the right of transit passage through such straits, and that this right "shall not be impeded" and "there shall be no suspension of transit passage." Transit passage is defined as the exercise of freedoms of navigation and overflight "solely for the purpose of continuous and expeditious transit" (Article 38(2)).

UNCLOS Article 37: Applies transit passage to straits between high seas/EEZ to high seas/EEZ — the Strait of Hormuz qualifies.
UNCLOS Article 38: Right of transit passage cannot be suspended, even in times of tension; all ships and aircraft — including warships — enjoy this right.
UNCLOS Article 44: Strait states (Iran, Oman) shall not hamper transit passage and must publicise any danger to navigation.
Critical legal dispute: Neither the US nor Iran has ratified UNCLOS (US signed, Iran has not ratified), complicating enforcement under treaty law; however, transit passage through Hormuz is also argued to be customary international law.
Iran's position: as a non-ratifier, it does not accept transit passage rights; it prefers "innocent passage" — a more restrictive regime that can be suspended in wartime.

Connection to this news: The legal dispute over whether Iran can lawfully close the strait under international law is central to the crisis; the US and most of the international community argue UNCLOS transit passage rights are non-suspendable, while Iran contests this as a non-ratifier.

India's Energy Security and Persian Gulf Dependence

India is the world's third-largest crude oil consumer and imports approximately 87–90% of its oil needs. The Persian Gulf region — including Saudi Arabia, Iraq, UAE, Kuwait, and Iran — has historically accounted for approximately 60–65% of India's crude oil imports, though Russia's share has grown to about 36% by 2024–25. The Strait of Hormuz is therefore a critical artery for Indian energy security: disruption in the strait directly raises India's import costs, worsens the current account deficit, weakens the rupee, and drives inflation. India's energy security strategy involves diversifying import sources, building Strategic Petroleum Reserves (SPR), investing in renewable energy, and maintaining diplomatic relations with all key oil-producing nations.

India imports approximately 87–90% of crude oil requirements; third-largest consumer globally after the US and China.
Persian Gulf share of Indian crude imports: approximately 46–65% depending on the year (declining as Russia's share grows).
Russia's share in India's crude imports rose from ~1% in 2017 to approximately 36% by 2024.
Indian Strategic Petroleum Reserve (SPR): maintained at Visakhapatnam, Mangaluru, and Padur; capacity approximately 5.33 million metric tonnes — covering approximately 9–10 days of net imports.
India's key energy security institutions: Ministry of Petroleum and Natural Gas; Indian Strategic Petroleum Reserves Ltd (ISPRL); Petroleum Planning and Analysis Cell (PPAC).
Oil prices above $100/barrel significantly strain India's import bill and macroeconomic stability.

Connection to this news: With Brent crude above $115/barrel, India's import bill is under acute pressure; the Hormuz crisis directly tests India's energy security architecture, making this a live case study of strategic vulnerability and the need for SPR expansion and diversification.

Iran's Nuclear Programme and International Non-Proliferation Regime

Iran's nuclear programme has been a central flashpoint in international relations for two decades. The Joint Comprehensive Plan of Action (JCPOA), agreed in 2015 between Iran and the P5+1 (US, UK, France, Russia, China + Germany), placed limits on Iran's uranium enrichment in exchange for sanctions relief. The US withdrawal from the JCPOA in 2018 and reimposition of sanctions triggered Iran's stepwise resumption of enriched uranium stockpiling. Iran's enrichment capacity has progressively expanded since 2019, with uranium enriched to near-weapons-grade (60% or higher) stockpiled in quantities that concern non-proliferation experts. The current US-Iran standoff is intertwined with the demand that any resolution include verifiable caps on Iran's nuclear programme.

JCPOA (2015): limited Iran's uranium enrichment to 3.67% purity and 300 kg stockpile; granted access to IAEA inspectors.
US withdrew from JCPOA in May 2018 ("maximum pressure" policy); Iran began rolling back commitments in 2019.
Non-Proliferation Treaty (NPT): Iran is a signatory; IAEA monitoring is the primary verification mechanism.
Iran's enriched uranium stockpile (pre-2026 crisis): multiple tonnes enriched to 60% purity — close to weapons-grade (90%+).
The US conditioned lifting the Hormuz blockade on nuclear concessions — making the strait the most immediate leverage point in a broader non-proliferation negotiation.
India's position: supports diplomatic resolution; member of the IAEA; has historically maintained energy and economic ties with Iran while navigating US sanctions pressure.

Connection to this news: The Strait of Hormuz crisis is not merely a geographical or energy story — it is embedded in a non-proliferation standoff; understanding the JCPOA background and NPT framework is essential context for Mains IR answers on this crisis.

Key Facts & Data

Strait of Hormuz: approximately 21 nautical miles wide at the narrowest; approximately 20% of world oil trade transits daily.
UNCLOS Article 38: right of transit passage through international straits cannot be suspended.
India imports approximately 87–90% of crude oil; Persian Gulf historically accounts for 46–65% of imports.
Indian SPR capacity: approximately 5.33 million metric tonnes (roughly 9–10 days of net imports).
Brent crude surged above $115/barrel amid the 2026 Hormuz crisis — highest in nearly four years.
Iran's reported revenue loss from the blockade: approximately $500 million per day.
JCPOA (2015): established limits on Iran's enrichment; collapsed after US withdrawal in 2018.
Neither the US nor Iran has ratified UNCLOS — a key legal uncertainty in the Hormuz transit passage dispute.