Trump Considers Seizing Iran's Kharg Island to Force Strait Reopening

Three weeks into the most significant disruption of global energy markets since the 1973 Arab oil embargo, the Trump administration is weighing an option that military planners and legal scholars describe as without modern precedent: the seizure of a sovereign nation's territory to coerce it into reopening a maritime chokepoint. The target is Kharg Island, a 20-square-mile coral outcrop in the northern Persian Gulf that processes 90% of Iran's crude oil exports [1][2].

"The president has made no decisions on Kharg Island," a senior White House official told Axios on March 20, but added that "that could change" if the effort to clear the Strait of Hormuz stalls [1].

The Chokepoint That Holds the World Hostage

The Strait of Hormuz, a 21-mile-wide passage between Iran and Oman, carried an average of 20 million barrels per day of crude oil and petroleum products in 2025—roughly one-fifth of global petroleum liquids consumption and about 34% of all seaborne crude oil trade [3][4]. Approximately one-fifth of global liquefied natural gas trade, primarily from Qatar, also transits the strait [3].

The countries most exposed to a closure are those with the heaviest dependence on Gulf crude. Japan, South Korea, China, and India collectively import the vast majority of oil that passes through Hormuz. Gulf producers—Kuwait, Iraq, Saudi Arabia, and the UAE—have seen their combined output drop by at least 10 million barrels per day since the closure took effect, according to reports as of March 12 [5].

Source: FRED / U.S. Energy Information Administration

Data as of Mar 16, 2026CSV

Kharg Island itself, located 34 miles northwest of the port city of Bushehr and 15 nautical miles from the Iranian mainland, has a theoretical loading capacity of about 7 million barrels per day, though Iran's actual exports before the conflict hovered around 1.6 million barrels daily [2][6]. The island is guarded by the Islamic Revolutionary Guards Corps (IRGC), including the 112th Zolfaghar Surface Combat Brigade, a unit specializing in fast-attack boat operations [2].

How the Crisis Reached This Point

The path to the current standoff follows a clear escalation timeline rooted in the Trump administration's "maximum pressure" campaign against Iran.

In February 2025, Trump signed National Security Presidential Memorandum 2, directing a campaign to "drive Iran's export of oil to zero" [7]. That June, the U.S. launched Operation Midnight Hammer, which significantly degraded Iran's nuclear program [7]. Domestic unrest followed as Iran's rial fell to historic lows.

The decisive escalation came on February 28, 2026, when the United States and Israel launched coordinated airstrikes under Operation Epic Fury, targeting military facilities, nuclear sites, and leadership—resulting in the death of Supreme Leader Ali Khamenei [7]. Iran's response was swift: on March 2, a senior IRGC official confirmed the Strait of Hormuz was closed, threatening any ship that attempted transit [7][8].

By March 5, Iran refined its policy: the strait would remain closed to ships from the U.S., Israel, and their Western allies, while tankers picking up Iranian crude could pass freely [7][1]. As of March 12, Iran had carried out 21 confirmed attacks on merchant ships [7]. The strait is effectively shut to tanker traffic, stranding nearly a fifth of global crude, petroleum products, and LNG supplies [9].

On March 10, U.S. Central Command conducted bombing raids on military infrastructure on Kharg Island itself—targeting mine storage facilities and missile sites while leaving the oil terminal intact [10][2]. Trump claimed the strikes "totally obliterated" military targets and said he could destroy the island's oil pipelines "on five minutes' notice" [10].

The Strategic Case for Seizure

Proponents within the administration frame the Kharg operation as an "economic knockout of the regime"—a way to defund Tehran while creating leverage for negotiations [1].

The logic rests on several pillars. First, controlling Kharg would deny Iran its primary source of revenue, since the island handles roughly 90% of crude exports [2][6]. Second, unlike airstrikes on the oil terminal—which would destroy infrastructure that might be useful in post-conflict negotiations—physical occupation would preserve the asset while denying its use [1].

A source with knowledge of White House thinking described the plan's sequencing: "We need about a month to weaken the Iranians more with strikes, take the island and then get them by the balls and use it for negotiations" [1]. Those negotiations could extend beyond the strait to include the surrender of enriched uranium [11].

The administration has also framed the broader military campaign as protecting freedom of navigation, offering to escort ships through contested waters [10]. Trump referenced a remark he made in 1988: "I'd go in and take it" [10]—a position he has held, by his own account, for nearly four decades.

The Military Requirements—and Their Limits

Seizing a defended island 15 miles off an adversary's coast is a qualitatively different operation from airstrikes. Multiple Marine units are converging on the region: the USS Tripoli carrier task force with a 2,500-strong Marine Expeditionary Unit, the Boxer Amphibious Ready Group with the 11th Marine Expeditionary Unit (whose deployment has been accelerated), and the USS New Orleans [11]. Trump has over 10,000 troops at his disposal in coming weeks [12].

But taking the island and holding it are distinct challenges. Retired Admiral Mark Montgomery cautioned that seizure could expose troops unnecessarily, noting Iran would likely halt mainland oil production anyway, rendering the island's capture strategically moot [11]. Analysts at the Quincy Institute have described the operation as falling "somewhere between a suicide mission and a self-imposed hostage crisis" for the troops involved [12][13].

The island sits within range of Iranian rocket artillery, ballistic missiles, and drone swarms launched from the mainland. At least 13 U.S. service members have already died in the broader conflict, with another 200 injured, including 10 severely [12]. Iran has demonstrated its reach: following Operation Epic Fury, it launched 314 ballistic missiles, 15 cruise missiles, and 1,672 drones at targets across the Gulf region, striking U.S. bases at Al Udeid in Qatar, Ali Al Salem in Kuwait, Al Dhafra in the UAE, and the Fifth Fleet headquarters in Bahrain [14][15].

Iran's Retaliatory Arsenal

Iran's capacity for retaliation extends well beyond conventional military strikes. In the weeks since Operation Epic Fury, Iran has targeted not only U.S. military installations but also civilian sites—airports, hotels—and, critically, oil and gas infrastructure across the Gulf [14][16].

The strikes on the UAE alone involved hundreds of drones and missiles [16]. Gulf Cooperation Council states hold 32% of the world's proven crude reserves [10], and their infrastructure is exposed to Iranian attack. Oil production across Kuwait, Iraq, Saudi Arabia, and the UAE dropped by 6.7 million barrels per day by March 10, and by at least 10 million barrels per day by March 12, due in part to Iranian strikes on Gulf infrastructure [5].

Iran's proxy network adds another layer of threat. The Houthis in Yemen maintain the capability to target U.S. warships in the Red Sea and bases across the Gulf, particularly the Fifth Fleet headquarters in Bahrain [14]. Intelligence reports indicate Iran has also deployed naval mines in the strait itself [9].

Historical Precedents and Their Limits

The closest U.S. military precedent is Operation Praying Mantis on April 18, 1988, when the Navy destroyed two Iranian oil platforms, two frigates, a fast-attack craft, and multiple armed boats in retaliation for the mining of USS Samuel B. Roberts [17]. The operation lasted one day, obliterated nearly half of Iran's operational fleet, and contributed to Iran's decision to accept a ceasefire in the Iran-Iraq War later that summer [17].

But the comparison has severe limitations. Praying Mantis targeted offshore platforms used as command centers—it did not involve occupying sovereign territory or deploying ground forces. The 1989 Panama invasion, another frequently cited analogy, involved seizing a small nation's capital—not occupying a fortified island within missile range of a large, militarily capable adversary.

The mine-clearing challenge alone is substantial. During the 1987-1988 Tanker War, clearing Iranian mines from Gulf shipping lanes took months. Current intelligence suggests Iran has seeded the strait with new mines [9], and the U.S. mine countermeasure fleet has shrunk considerably since the late 1980s.

The Legal Void

The legal foundation for seizing Kharg Island is, by most expert assessments, nonexistent under both domestic and international law.

Under the U.S. Constitution, Article I, Section 8 grants Congress the exclusive power to declare war. The War Powers Resolution of 1973 limits presidential military action to cases involving a declaration of war, explicit congressional authorization, or a national emergency created by an attack on U.S. forces [18][19]. The Trump administration has not sought a new Authorization for Use of Military Force, and legal scholars have questioned whether any existing authorization covers ground operations to seize Iranian territory [18].

Under international law, Article 2(4) of the UN Charter prohibits the use of force against another state's territorial integrity. Stanford law professor Allen Weiner has noted that the attack on Iran was "quite clearly illegal" absent either a valid self-defense claim under Article 51 or UN Security Council authorization—neither of which applies here [19][20]. The administration submitted an Article 51 letter to the UN claiming self-defense in connection with the February 28 strikes, but legal analysts have disputed the claim of imminence [20][21].

Seizing and holding sovereign territory goes well beyond even the contested legal space of airstrikes. As one constitutional scholar at JURIST put it: the strikes—let alone a ground occupation—represent action taken with "no authorization, no imminence, no plan" consistent with the rule of law [18].

The Economic Toll

The economic consequences of the strait's closure are already severe and would intensify with a Kharg Island operation.

Source: Multiple sources: SolAbility, Dallas Fed, Wikipedia

Data as of Mar 20, 2026CSV

WTI crude oil prices surged from roughly $67 per barrel in late February to $98 per barrel by March 13 [22]. Brent crude exceeded $126 per barrel at its peak [5]. Analysts at Goldman Sachs and the Dallas Federal Reserve project that continued closure could raise WTI prices to $98 per barrel on average in Q2 2026, while lowering global real GDP growth by an annualized 2.9 percentage points [5][23].

Trita Parsi of the Quincy Institute warned that military escalation involving Kharg could push oil prices above $150 per barrel, sending U.S. gasoline prices to $5-6 per gallon with cascading effects on food prices and agriculture [10]. The daily cost of the closure has been estimated at between $0.6 billion and $36 billion, depending on the scope, with cumulative GDP losses potentially reaching $3.5 trillion in a prolonged scenario [5].

Beyond oil, roughly one-third of global fertilizer trade transits the Strait of Hormuz. Fertilizer prices have already surged from $475 to $680 per metric ton [5].

The IEA has announced a release of 300-400 million barrels from strategic reserves across member nations [9][24]. The United States holds approximately 415 million barrels in its Strategic Petroleum Reserve, covering roughly 200 days of imports. Japan holds reserves covering approximately 230-260 days, while China maintains an estimated 1.2 billion barrels, covering 104-115 days [24]. These buffers provide time but not a permanent solution if the strait remains closed.

For the Trump administration, the political calculus is inescapable. Rising gas prices during a period of conflict carry domestic political risk, and an operation that escalates the crisis rather than resolving it could compound that exposure.

What Comes Next

The decision on Kharg Island has not been made, but the pieces are moving into position. Marine expeditionary units are converging on the Gulf. Airstrikes continue to degrade Iranian military infrastructure around the strait. Administration sources describe a phased timeline: more strikes, then the island, then negotiations [1][11].

The counterarguments are equally concrete. A ground force on Kharg Island would be within range of Iranian missiles and drones. Iran has already demonstrated willingness to strike U.S. bases and Gulf infrastructure across six countries [14][15]. Legal authority for the operation is contested at best. And the economic consequences of further escalation—measured in trillions of dollars of potential GDP loss—fall most heavily on the global consumers and Gulf Arab states whose cooperation the U.S. needs [5][10].

The question facing the administration is whether the leverage gained by holding Iran's oil lifeline outweighs the military, legal, and economic costs of taking it—and whether the troops sent to seize it can be sustained on an island 15 miles from a hostile mainland whose government has shown it will strike back with everything it has.