(DEFENCE SECURITY ASIA) — Iran has warned that renewed American strikes could bring U.S. military bases in Europe into the conflict, putting allied governments under pressure over whether their territory can support another campaign, extending the political consequences of any decision in Washington.

Mohsen Rezaei, secretary of Iran’s Supreme National Security Council, said in an interview that “We may even target some US military bases in European countries,” making European basing a point of contention while leaving the threatened facilities unspecified.

Rezaei also raised the possibility of striking unnamed islands, language that puts the joint U.S.–UK base at Diego Garcia back into the debate after a disputed incident in March involving ballistic missiles reportedly launched toward the Indian Ocean facility.

The warning widens debate over host nation consent, because the airfields and support infrastructure that give the United States options for a renewed campaign also expose allies to political and security consequences from decisions made in Washington.

Rezaei tied his warning to aircraft departing distant bases to strike Iran, framing retaliation around a facility’s role in an attack and leaving unresolved how Tehran would treat allied territory used for other forms of military support.

The warning comes as the 2026 U.S.–Israel–Iran war continues at a lower tempo, with an American naval blockade, disputes over shipping through the Strait of Hormuz and the unresolved Lebanon front keeping several routes to renewed confrontation open.

Washington’s public message has been that a major new offensive is unlikely for now, while Tehran’s latest warning addresses what would happen if that assessment changes, leaving the immediate military outlook dependent on decisions that neither government has publicly committed to.

Iran’s Islamic Revolutionary Guard Corps announced in early November that it had lifted a previous missile range restriction of roughly 2,000 kilometres, a policy change that lends weight to the warning as strategic signalling while leaving the reliability of longer range systems unresolved.

The reported March incident near Diego Garcia offers a limited benchmark since neither missile reportedly hit the base, Iran denied responsibility and the episode yielded little public evidence of a repeatable capability at comparable distances.

Europe and the Indian Ocean present different questions for U.S. force posture, with European governments facing decisions over access to bases while Diego Garcia raises questions about the reliability of a distant joint operating location.

For military planners, the warning draws attention to the logistics footprint behind any air campaign, because political uncertainty over access can affect the continuity of an operation even before either side changes its aircraft or missile deployments.

For governments trying to contain the war, Iran has put European hosts into its deterrence message while the existing disputes over Hormuz, the blockade and Lebanon continue to test the remaining diplomatic channels for containing escalation.

(READ) Iran Eyes Strikes on US, British Bases in Europe as NATO Threat Widens

Why U.S. Bases in Europe Are Now Part of Tehran’s Warning

Rezaei’s distinction between nearby and distant bases builds on his account of how Iranian retaliation widened between the June 2025 war and the first roughly 40 days of fighting in 2026, when U.S. facilities in the Gulf came under attack.

His account presents that widening as a deliberate policy decision after heavier attacks and the killing of Supreme Leader Ali Khamenei, giving Tehran a narrative of escalating retaliation that it can invoke now as it warns European governments against enabling another offensive.

Rezaei urged countries hosting American forces to withhold cooperation with renewed strikes, putting decisions about the use of military infrastructure at the centre of the dispute and giving host governments a stake in how Washington interprets the warning.

The language about departure airfields matters because military installations often support several missions at once, leaving host governments to determine whether their own permissions cover offensive operations and whether they can communicate those limits clearly enough to reduce the risk of misinterpretation.

Rezaei invoked self-defence under the United Nations Charter to justify the warning, setting out Tehran’s legal position while leaving unresolved how governments hosting American forces would assess the status of their facilities or respond to an Iranian attack.

European hosts face different political circumstances even where they share an alliance with Washington, because each government must weigh its relationship with the United States, the uses permitted at installations on its territory and the consequences of being drawn into another war.

The timing gives Tehran diplomatic leverage while Washington is publicly playing down the likelihood of a major offensive, since European governments can face pressure over potential cooperation well before aircraft are assigned to a campaign.

Rezaei’s prediction that a renewed American operation would probably last three to five days reflects his reading of constraints on Washington and Israel, while the interview offers no operational evidence that either government has chosen that timetable.

The significance of European basing depends on whether Washington seeks access for a particular mission and how the host government responds, two decisions that could reshape a campaign’s logistics even in the absence of an Iranian launch.

The warning also creates a risk of divergent interpretations if a crisis develops, because the host government, Washington and Tehran may assign different significance to military activity, complicating diplomatic coordination and escalation control across the alliance.

(READ) Iran Fires IRBM at Diego Garcia — 4,000 km Missile Launch Expands War Zone, Signals New Threat to U.S. Bases Across Indian Ocean and Europe

Iran’s Missile Range Claims Face a Reliability Test

The reported removal of Iran’s roughly 2,000-kilometre missile range cap changes the declared policy governing the programme, giving Tehran room to advertise wider reach while leaving the readiness and scale of any longer range force uncertain.

Rezaei said Iran’s “defensive and offensive capabilities are now far greater”, a broad official claim that the interview did little to substantiate with evidence of improved performance across repeated launches, dependable delivery over longer distances or a sustained operational inventory.

Iran’s established medium-range ballistic missile force and its reported efforts to extend reach raise different questions for Europe, where distance varies substantially across the continent and the demonstrated performance of one class of weapon cannot be assumed for another.

Military assessments must distinguish between the maximum distance a missile can travel and the distance over which it can deliver a useful payload reliably, because those measures describe different capabilities and imply different levels of confidence in claims of strategic reach.

At longer distances, the public evidence leaves considerable uncertainty about accuracy and reliability, factors that limit inferences from a reported launch and make official statements about wider geographic reach a poor proxy for operational readiness.

The difference between a demonstration and a deployable force also depends on inventory depth, because the ability to launch a small number of weapons says little about how many systems are available, how consistently they perform or how quickly losses can be replaced.

The 2025 and 2026 wars reportedly constrained production of advanced missiles, a factor that could slow any move from development to fielding, although the scale of the disruption and its implications for current inventories remain unclear from the available material.

Tehran can still derive political leverage from uncertainty about its longer range systems, because governments assessing the threat must weigh the costs of disruption and precaution before the available evidence is sufficient to determine how likely a successful strike would be.

The corresponding risk for Iran is that repeated claims of wider reach may invite closer scrutiny of test results, wartime performance and production capacity, making the credibility of future warnings increasingly dependent on evidence that foreign governments can assess independently.

The most defensible military reading is that the stated range policy has changed more clearly than the public evidence of reliable long-distance performance, a distinction that helps explain why the warning can influence diplomacy without settling the military balance.

Diego Garcia and the Disputed March Missile Incident

Rezaei left the islands unnamed, making Diego Garcia a plausible interpretation given its role as a joint U.S.–UK military base and the reported March incident, while leaving open which locations he intended to put at risk.

Accounts of the March incident describe two ballistic missiles reportedly fired toward Diego Garcia, with one failing in flight and the other reportedly intercepted, leaving the event relevant to assessments of reach even though neither weapon reportedly hit the facility.

Iran denied responsibility for the reported launches, and the origin, missile type and precise performance remain contested or uncertain, making the incident a weak basis for firm conclusions about which systems Tehran has available for comparable missions.

The incident matters because a distant operating base is valuable partly for the separation it provides from a regional conflict, and uncertainty about that separation can alter the assurances Washington and London seek about the facility.

Missile defence is one part of that calculation, but the outcome of one reported incident offers little basis for estimating future defensive performance, especially when public accounts leave important questions about the engagement and the weapons involved unresolved.

The joint status of Diego Garcia gives Britain a stake in the warning, because decisions involving the facility can carry consequences for both governments even when the immediate trigger described by Rezaei is an American decision to renew strikes on Iran.

A threat to a distant base can impose costs through preparedness and uncertainty about continued operations, since military planners have to judge whether the facility can sustain its assigned role during a crisis and what demand that would place on the wider force.

The limited public record supports an assessment of exposure to a possible threat, while confidence in its severity depends on questions about launch reliability, the accuracy of the reported engagement details and Iran’s ability to field a durable longer range force.

The distinction is consequential for public debate in Britain and the United States, where treating the island as explicitly named or the March launch as undisputed would give a degree of certainty to judgments that the underlying evidence does not support.

Diego Garcia belongs in the analysis because it illustrates how a remote installation can become part of a regional confrontation through its military role, a possibility that links Indian Ocean force posture to decisions taken far from the base itself.

What the Threat Changes for U.S. Force Posture and Logistics

A sustained air campaign depends on more than the availability of combat aircraft, because personnel, maintenance and supply arrangements must remain dependable across the installations that support operations, making the durability of basing agreements a factor in military endurance.

Host nation consent affects which elements of that support network can be relied on in a crisis, and uncertainty about permissions can reduce planning flexibility even if the physical capacity of the bases and the availability of forces are unchanged.

The political value of access can vary with the kind of support a host is prepared to provide, because a government may regard routine military activity and participation in an offensive as carrying different obligations and different risks of retaliation.

Europe and Diego Garcia illustrate different dependencies within the broader U.S. posture, since European access is distributed across several host relationships while reliance on Diego Garcia raises questions tied to one remote facility and its bilateral operating arrangements.

The Gulf experience also matters for judging the new warning, because attacks on regional U.S. facilities during the 2026 war showed that infrastructure supporting an air campaign can become a continuing concern for both the force using it and the government hosting it.

Distance can reduce some forms of exposure while increasing the demands of sustaining operations, so the value of remote basing depends on whether the wider support network can maintain the required pace over time and whether its political agreements endure.

Force protection consequently carries an opportunity cost, because the resources and attention devoted to maintaining the continuity of a distributed posture must be weighed alongside the competing demands of a campaign whose scope, duration and basing arrangements remain uncertain.

There is also a distinction between continued access and assured continuity, since a government may keep an agreement in place while officials reassess the permitted use of a facility as domestic pressure, allied consultations or the character of the fighting changes.

Assessing the logistics footprint therefore requires looking beyond public statements about the number of available bases to whether governments have agreed on their use, whether those decisions are durable and whether Washington can sustain the forces assigned to a mission.

Rezaei’s warning puts those questions before allied governments, giving those governments a reason to clarify their positions on access while the United States retains options and the prospect of another major offensive remains publicly uncertain.

Hormuz, Lebanon and the Risk of a Wider War

The latest warning follows months in which diplomacy lowered the fighting’s intensity without resolving the disputes that kept it going, leaving the Strait of Hormuz, the U.S. naval blockade and the Lebanon front capable of bringing renewed pressure on negotiations.

The Pakistan-brokered April ceasefire and June Islamabad memorandum showed that arrangements could slow hostilities and open talks, but the breakdown in early July after attacks on shipping exposed how quickly events at sea could undo progress made through diplomacy.

Iran continues to link progress over Hormuz to an end to fighting on other fronts, particularly Lebanon, a position that complicates mediation because developments involving parties outside the immediate U.S.–Iran exchange can affect whether a maritime arrangement holds.

The blockade maintains American pressure even as Washington plays down the prospects of a major new offensive, allowing maritime operations to remain a source of friction with Tehran while both sides publicly frame their positions around the risk of renewed fighting.

In this setting, a threat against distant bases serves as a deterrent message to several audiences at once, seeking to influence U.S. decisions, European consent and British risk assessments while reinforcing Iran’s account of how it would respond to renewed strikes.

That breadth can complicate crisis management, since governments facing different military exposures may read it differently, complicating efforts to establish a shared position on basing, protect diplomatic channels and avoid further escalation during a fast-moving crisis.

Qatar and Pakistan remain involved in mediation, and their scope for progress depends in part on whether governments can contain incidents around Hormuz and maintain space for talks while the Lebanon front and the blockade remain unresolved.

Three developments would materially change the assessment in the weeks ahead, namely a decision by Washington to resume major strikes, new evidence of dependable Iranian long-range missile performance or a public change in the conditions allied governments place on base access.

Each would alter a different part of the crisis, with American action testing Tehran’s stated response, verified performance changing the military assessment and allied access decisions determining how much political leverage Iran’s threat has generated beyond the immediate theatre.

For now, the warning has widened the diplomatic geography of the war more clearly than Iran has demonstrated wider missile reach, making European basing and Diego Garcia part of an escalation debate still shaped by unresolved fighting closer to Iran.