Washington’s deployment of amphibious forces to the Middle East and public talk of seizing Kharg Island have sharpened a dangerous calculus: a small, strategically vital landmass could become the flashpoint that drags the United States into a broader, harder-to-control war with Iran.
Over the past week US outlets have reported that the Pentagon has ordered an amphibious ready group—centered on the USS Tripoli and carrying a Marine expeditionary unit—toward the Gulf to reinforce carrier strike groups already operating near the Strait of Hormuz. US leadership has publicly framed strikes on Kharg’s military targets as aimed at deterring attacks on shipping, while preserving the island’s oil infrastructure for now.
On paper Kharg is an attractive target. The island lies roughly 25 kilometres off Iran’s coast, measures only a few kilometres across and hosts pipelines and loading terminals that handle a large share of the country’s seaborne oil exports. Seizing it could strike at Tehran’s export capacity and provide a bargaining chip in coercive diplomacy.
But the military realities complicate that logic. Any amphibious approach must cross the Strait of Hormuz, where Iran’s defensive doctrine mixes small, fast attack craft, land-based missiles, swarming drones, and thousands of naval mines. Clearing mines is slow and exposes clearance teams to missile and drone attack; independent analysts note that Iran’s inventory of some 5,000–6,000 mines gives it enduring asymmetric leverage over shipping lanes.
Even if Marines can storm and occupy Kharg quickly, holding it would be arduous. The island’s limited area offers little depth for defence, its supply lines would run close to Iranian shores, and garrison forces and logistics convoys would be vulnerable to persistent missile and drone strikes. The US would need expanded air defence and sustainment chains to prevent a campaign of attrition from turning a tactical seizure into a strategic quagmire.
There are also political and economic spillovers. Tehran has threatened reciprocal attacks on Western oil facilities and warned it could target energy assets linked to American partners. A US seizure would likely roil global oil markets, raise insurance costs for Gulf shipping and force allies to pick sides — complicating any attempt to build a broad diplomatic coalition.
Domestically in Washington, officials face a trade-off between the short-term appeal of a decisive demonstration of force and the long-run costs of occupation, escalation and potential casualties. Some American commentators and officials treat an occupation as a straightforward coercive option; experienced military analysts counter that the asymmetric nature of Iran’s defences and the geography of the Gulf make occupation expensive, risky and politically hazardous.
For Tehran, the prospect of US boots on Kharg offers a potent narrative: a violation of sovereignty that can be used to justify asymmetric retaliation across the region, including strikes on shipping, proxy operations and attacks on foreign energy infrastructure. That would complicate efforts by regional actors and global markets to return to stability, making Kharg less a lever of leverage and more a magnet for escalation.