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Explained: Why and How Iran Is Using Hormuz as a Weapon

New Delhi (ABC Live): Iran is using the Strait of Hormuz as a weapon of war because it is the narrow point where geography, oil, shipping, diplomacy, and inflation meet. As ABC Live noted in its earlier explainer on whether the Iran war could trigger a wider global conflict, this war is no longer just about missiles and military strikes. It is also about economic pressure, energy routes, and the costs that can be imposed on the wider world. The Strait of Hormuz remains one of the world's most important energy chokepoints. The International Energy Agency says that in 2025, nearly 20 million barrels of oil per day moved through the Strait. It also says that over 110 bcm of LNG passed through Hormuz in the same year. The U.S. Energy Information Administration likewise describes Hormuz as a critical oil chokepoint with very limited alternatives if disruption becomes prolonged. That is why Iran keeps returning to Hormuz during periods of conflict. Tehran cannot always outmatch stronger rivals in conventional military terms. However, it can still create fear in shipping markets, push up insurance costs, slow tanker movement, and unsettle oil and gas prices. In simple terms, Iran is using Hormuz because it is the fastest way to turn geography into pressure. On a map, the Strait of Hormuz looks like a narrow waterway between Iran and Oman. In strategic terms, however, it behaves like a switchboard for the global economy. When ships move normally, Gulf oil and gas reach Asian and other importers with limited interruption. When that movement is threatened, delayed, or selectively restricted, the shock does not stay at sea. It reaches freight rates, energy prices, inflation expectations, and diplomatic calculations. This is what makes Hormuz useful to Iran in wartime. Tehran's aim is not only to challenge warships or block tankers. It is to make the wider world feel the cost of war. The IEA says about 80% of oil and oil products transiting Hormuz in 2025 were destined for Asia. That means the economic audience for any Hormuz crisis sits largely in India, China, Japan, South Korea, and other Asian economies that depend on Gulf energy. Iran also benefits from the fact that selective pressure can be more effective than an absolute shutdown. A total and sustained closure would invite stronger retaliation. By contrast, calibrated disruption, threats, exemptions, and selective restrictions can create fear and bargaining power while still leaving room for diplomacy. That is why Hormuz works not only as a physical chokepoint, but also as a political instrument. Iran sits directly beside the northern side of the Strait. That location does not give Tehran full legal control over international shipping, but it gives it proximity, visibility, and the ability to create credible risk in a narrow corridor. In chokepoint politics, proximity alone can produce leverage. Iran has long relied on asymmetric tools that raise the cost of confrontation without requiring a symmetric military balance. Hormuz fits that doctrine perfectly. A few disruptions, repeated threats, or rising uncertainty can have effects far larger than the immediate military action that caused them. The memory of the 1980s Tanker War still shadows Gulf strategy. That period showed that attacks on shipping can internationalize a regional conflict and force outside powers to react. The enduring lesson for Tehran is that maritime insecurity in the Gulf can generate political consequences far beyond the battlefield itself. As ABC Live's broader World War III explainer suggested, wars in this region quickly expand from military contests into systemic economic crises. From Iran's perspective, selective pressure often works better than a total blockade. It lets Tehran signal strength, raise global anxiety, and shape negotiations without immediately crossing every red line at once. Therefore, the Strait becomes a tool of controlled escalation rather than only a site of outright closure. The figures above come primarily from recent IEA assessments of Hormuz and the Middle East's role in global energy markets, supported by the U.S. EIA's classification of the Strait as a critical chokepoint. For India, Hormuz is not a distant naval issue. It is an energy-security issue, an inflation issue, and a trade-risk issue. Official PPAC data shows that India's crude oil imports from OPEC countries rose to 50.1% of total imports during April-January FY 2025-26, up from 48.3% in the comparable period a year earlier. That does not mean all of that volume passes through Hormuz, but it does show that India remains materially exposed to Gulf-linked energy instability. India's exposure is not limited to crude. Hormuz also matters for gas. The IEA says that over 110 bcm of LNG moved through the Strait in 2025, and that Gulf exporters such as Qatar and the UAE depend heavily on this route. For India, that means a Hormuz crisis can affect not only petrol and diesel economics, but also fertilizer, power, city gas, and industrial fuel costs. The first Indian effect may be higher cost rather than immediate shortage. Even if physical supply continues, freight, insurance, and price volatility can raise the landed cost of energy. That, in turn, can feed into imported inflation and wider macroeconomic pressure. This is why the Strait matters not only to diplomats and naval planners, but also to policymakers watching inflation, subsidy pressure, and the current account. This India angle is exactly why the Hormuz story fits naturally with ABC Live's earlier wider-war explainer. A Gulf chokepoint crisis is not only a regional conflict story. It is also an India economic-security story. Iran is using the Strait of Hormuz as a weapon of war for three broad reasons. First, it wants to raise the cost of attacking Iran by making the consequences spill into global energy markets. Second, it wants outside powers, especially energy-dependent states, to push for restraint and de-escalation. Third, it wants to prove that sanctions and military pressure have not removed its strategic options. In that sense, Hormuz is not merely a route that Iran can threaten. It is a message. The message is that if Iran is squeezed, the wider regional energy system can also be squeezed. That is why the Strait has become one of Tehran's most powerful tools of wartime leverage. Iran's Hormuz strategy is powerful, but it is also risky. The longer disruption lasts, the stronger the incentive for outside powers to find bypass routes, increase maritime protection, diversify energy sourcing, or build broader diplomatic coalitions against Tehran's pressure tactics. The IEA notes that alternative export routes do exist through Saudi and UAE infrastructure, but they are limited compared with the volume that normally moves through Hormuz. That means Iran can create serious short-term pain, but it cannot assume indefinite coercive advantage without consequences. Iran is using the Strait of Hormuz as a weapon of war because it is the one place where a regional power can quickly turn geography into global pressure. The Strait lets Tehran affect oil flows, gas trade, freight costs, inflation, and diplomatic calculations all at once. That is why Hormuz matters far beyond the Gulf. For India, the lesson is direct. A Hormuz crisis is not only a West Asia security event. It is an India energy event, an India inflation event, and an India trade-risk event. As long as India remains dependent on imported energy linked to Gulf routes, the Strait of Hormuz will remain one of the most important chokepoints in its strategic future. Based this article on current primary and official references wherever possible. We used the International Energy Agency for 2025 oil and LNG flow data through Hormuz and for Asia's share of those flows. We used the U.S. Energy Information Administration for chokepoint context and route vulnerability. We used India's PPAC data for the India import-exposure angle. We also embedded ABC Live's earlier explainer on the risk of wider war because it provides relevant internal context for how this conflict is expanding beyond a purely military frame. Where this article draws conclusions about leverage, coercion, or bargaining strategy, those are analytical inferences based on the cited data and route importance, not direct admissions by Iranian officials.

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