Iran and the Strait of Hormuz: Historical Leverage and the 2026 Blockade Crisis
The ongoing 2026 West Asia conflict — triggered by US-Israel military strikes on Iran — has resulted in Iran effectively closing the Strait of Hormuz to international shipping, marking the first time in history that Iran has executed rather than merely threatened a closure.
Iran is deploying a strategy of selective drone strikes near the Strait, making insurance and shipping companies unwilling to transit the narrow waterway.
Iran controls several strategic islands — Greater Tunb, Lesser Tunb, Abu Musa, Lark, Qeshm, and Hormuz — from which it can deploy anti-ship cruise missiles and suicide drones.
The resulting disruption is described as the largest global oil supply shock in history — three times the scale of the 1973 Arab oil embargo.
84% of crude oil and condensate and 83% of LNG moving through the Strait in 2024 went to Asian markets, with India, China, Japan, and South Korea as the top destinations.
The Strait of Hormuz: Geography and Strategic Importance
The Strait of Hormuz is a narrow waterway between Iran to the north and Oman and the UAE to the south, connecting the Persian Gulf to the Gulf of Oman and the Arabian Sea. It is the world's most critical maritime chokepoint for oil and gas trade.
Iran's geographic control over the Strait — combined with its island fortifications and missile arsenal — gives it a unique veto power over global energy supply that no other state possesses to the same degree.
Iran's Military and Geostrategic Position in the Gulf
Iran has the longest coastline of any of the eight countries bordering the Persian Gulf, giving it extensive surveillance and interdiction capability. Iran's Islamic Revolutionary Guard Corps Navy (IRGCN) specialises in asymmetric warfare in the Persian Gulf — swarm boat tactics, mines, anti-ship missiles, and now drone strikes.
Key Details
- Iran controls the strategically located islands of Greater Tunb, Lesser Tunb, and Abu Musa, which have been disputed by the UAE since Iran seized them in 1971 — just before the UAE's formation.
- The IRGCN operates separately from the regular Iranian Navy (Artesh) and is ideologically aligned with the Supreme Leader.
- Iran has tested and deployed anti-ship ballistic missiles (ASBMs) capable of targeting aircraft carriers — a capability few states possess.
- Iran's doctrine for Hormuz closure relies on "area denial" — making the strait too risky to navigate rather than physically blocking it.
The 2026 closure is not a naval blockade in the traditional sense; it is asymmetric area-denial via drone strikes, exploiting the chokepoint's extreme narrowness and the fragility of commercial insurance markets.
Historical Precedent: The Tanker War (1980–1988)
During the Iran-Iraq War, both sides targeted oil tankers in the Persian Gulf and Strait of Hormuz in what became known as the "Tanker War." Iran attacked ships carrying Iraqi oil while Iraq targeted vessels dealing with Iran. The US eventually intervened with Operation Earnest Will (1987-88), re-flagging Kuwaiti tankers under the US flag and providing naval escorts.
The historical Tanker War shows that Hormuz disruptions are not novel — but the 2026 crisis differs in scale and Iran's willingness to execute the threat, enabled by drone technology that makes area-denial far cheaper than conventional naval warfare.
India's Vulnerability to Hormuz Disruptions
India is uniquely exposed to Strait of Hormuz disruptions: it imports approximately 40% of its crude oil from Gulf producers transiting the Strait, hosts a large diaspora in the Gulf (approximately 8.9 million NRIs), and exports agricultural products, textiles, and pharmaceuticals to the Gulf region.
Key Details
- Nearly 40% of India's crude oil and a significant share of LPG supplies transit the Strait of Hormuz.
- India's Strategic Petroleum Reserves cover only about 9.5 days of crude requirements at full capacity — well below the IEA's 90-day standard.
- Gulf Cooperation Council (GCC) countries account for over $35 billion in annual remittances to India — the largest source of India's foreign exchange earnings from remittances.
- The West Asia region accounts for approximately $11.8 billion of India's annual agricultural exports.
India's energy, trade, remittance, and diaspora dependencies on the Gulf make the Hormuz crisis a multi-dimensional national security challenge, not merely an energy supply problem.
- Strait of Hormuz: 33 km wide at narrowest; navigable lanes 3 km each way.
- Daily oil flow through Strait: ~20-21 million barrels (approximately 20% of global petroleum liquids).
- LNG flow: approximately 20% of global LNG trade.
- 84% of Strait's crude exports destined for Asian markets.
- Iran controls: Greater Tunb, Lesser Tunb, Abu Musa islands (disputed with UAE).
- 1973 Arab oil embargo: raised oil prices by ~300% in 4 months.
- 2026 Hormuz disruption: estimated 3x the scale of the 1973 crisis (Rapidan Energy Group).
- Tanker War (1980-88): 500+ ships attacked, Operation Earnest Will (US Navy escort, 1987-88).
- India's Gulf NRI diaspora: approximately 8.9 million.