Decapitation Strikes On Iran: Retaliation, Regional Escalation, And Strategic Fallout In The Gulf – Analysis

A Decapitation Strategy at the Heart of the State

Waves of US and Israeli airstrikes have now struck more than ten Iranian cities, and the death of Supreme Leader Ayatollah Ali Khamenei—who had ruled since 1989—marks a historic rupture, shaking the foundations of Iran’s political order and redefining the stakes in the region. President Donald Trump framed the campaign on his Truth Social platform as a mission to ‘defend the American people by eliminating imminent threats from the Iranian regime’. The White House emphasised that Iran had rejected every opportunity to abandon its nuclear ambitions, warning that preventing a ‘terrorist regime’ from acquiring nuclear weapons is an urgent strategic imperative.

Israeli Prime Minister Benjamin Netanyahu echoed this stance, asserting that denying Iran nuclear capability is not only essential but unavoidable. Far more than a limited military escalation, the joint air campaign signals a pivotal moment for Iran, calling into question the stability of its leadership and the country’s future direction. Israeli officials have further framed the strikes as an extension of their response to the 7 October 2023 Hamas attack, arguing that Tehran’s support for militant groups places it within the chain of accountability. As IDF Spokesperson Brig. Gen. Effie Defrin declared, ‘We will continue to pursue Israel’s enemies—from the architects of the attack to the terrorists who took part in the massacre’.

When kinetic operations are coupled with rhetoric endorsing political transformation in Tehran, the strategic objective appears to extend beyond deterrence or coercion into the domain of regime change. Such a recalibration carries profound implications—not only for Iran’s internal political stability, but also for regional security and the broader international order. Within the Islamic Republic, the Supreme Leader is far from ceremonial. The office sits at the apex of the political system, commanding the armed forces, supervising the judiciary, and shaping foreign policy and the nuclear programme.

The external removal of Khamenei constitutes leadership decapitation, with potentially far-reaching consequences for the regime and state apparatus. In the wake of his death, Iran has appointed Alireza Arafi to an interim governing council along with President Masoud Pezeshkian and the judiciary chief, the hardliner Gholamhossein Mohseni Ejei.

The Limits of Airpower and Institutional Resilience

Historically, regime change through airpower alone has produced mixed and often destabilising results. Airstrikes can degrade infrastructure, eliminate leadership figures, and disrupt command-and-control networks, but they rarely create a viable political alternative. Iran’s system is deeply institutionalised: the clerical establishment, security apparatus, and the Islamic Revolutionary Guard Corps (IRGC) form an interconnected power web. Even with the top leader removed, these institutions remain fully capable of consolidating power in response to perceived existential threats.

A potential major consequence of the attacks is hardline entrenchment. External aggression often generates a rally-around-the-flag effect, strengthening nationalist and ideological resolve. One indication of this phenomenon is the citizens’ reaction to the demise of the architect of the Islamic Republic, Khamenei, which manifested in widespread mourning in the streets of most cities of Iran. Sayyid Ali Khamenei will join the ranks of previous martyrs assassinated by foreign forces, including Qassem Suleimani, the head of the Quds Forces, who was killed in January 2020 near Baghdad airport.

The IRGC, already central to Iran’s political economy and regional strategy, may assume a more dominant governing role, either by shaping the succession process or steering policy directly. While the Assembly of Experts formally determines succession, wartime conditions may allow security actors to exert substantial influence over proceedings. Rather than weakening the regime, the strikes risk accelerating the militarisation of governance.

Many contend that Mojtaba Khamenei, the son of the deceased leader, is suitably qualified for nomination as the future Supreme Leader of the Islamic Republic. Politically, the secretary of the National Security Council, Ali Larijani, has gained prominence, suggesting a potential decline in religious authority. Any alteration in the political framework necessitates a constitutional referendum, which requires time.

It is crucial to highlight that the demonstrators do not present any feasible alternatives to supplant the regime; so, military intervention alone cannot promote or endorse a certain political leadership. Despite Reza Pahlavi, the previous Shah’s son, presenting himself as a genuine alternative to the Islamic regime, he lacks significant appeal among Iranians, primarily communicating in English.

The shock of leadership loss and sustained bombardment could expose fractures within Iran’s elite. Rival clerical factions, pragmatic technocrats, and security hardliners may disagree over how to respond. Some could advocate confrontation, while others might see de-escalation as necessary to preserve state continuity. Deepening divisions could trigger prolonged political uncertainty—fueling economic paralysis, capital flight, and social unrest.

Regional Escalation and Armed Movements

The broader regional impact has been immediate and will continue to unfold unpredictably. Iran relies heavily on alliances with non-state actors, including Hezbollah in Lebanon and Hamas in Gaza, which serve as extensions of Tehran’s forward deterrence doctrine. Perceived threats to regime survival may intensify attacks on Israeli or US interests, raising the possibility of multi-front escalation stretching from southern Lebanon to the Persian Gulf.

Armed Groups With Ties to Iran

Iran-aligned armed movements—including Hamas, Hezbollah, and the Houthis—have thus far exercised visible restraint. Describing them purely as “proxies,” however, obscures the more complex reality of the so-called “Axis of Resistance”: these actors share ideological affinity, financial and military linkages, and varying degrees of coordination with Tehran, but they retain their own political calculations, constituencies, and survival priorities.

Their current restraint appears less a sign of hesitation than of strategic calibration. Direct retaliation against the US or Israel would risk rapid escalation against materially superior forces, potentially endangering hard-won domestic legitimacy and territorial footholds. At the same time, acting precipitously, without clear strategic alignment across the network, could expose fractures within the broader Iran-aligned ecosystem.

Hezbollah has historically favoured calibrated, deniable, and asymmetric pressure over open confrontation unless Lebanese or organisational core interests are directly threatened. Hamas operates within the constraints of Gaza’s devastation and regional diplomatic isolation, while the Houthis must balance regional activism with the imperative of consolidating authority within Yemen. In each case, alignment with Tehran is real but mediated by local priorities and internal political economies.

For Gulf states, this dynamic presents a paradox. A strategically constrained or weakened Iran could open diplomatic or security opportunities. Yet the decentralised nature of these actors means escalation risks are not eliminated; they are redistributed. Activation need not follow a single directive. It could emerge through gradual signalling, deniable attacks on infrastructure or maritime routes, or symbolic strikes calibrated to test thresholds.

Regional Retaliation: Iran Targets Gulf States and Strategic Assets

In direct retaliation for the US–Israel strikes, Iran launched a coordinated wave of missile and drone attacks targeting multiple Gulf states hosting US military assets. The strikes affected the UAE, Bahrain, Kuwait, and Qatar, with additional spillover into Jordan due to intercepted projectiles and falling debris. In the UAE, impacts were reported in both Abu Dhabi and Dubai, including damage near critical infrastructure and temporary disruption at major aviation hubs. Bahrain, home to the US Fifth Fleet, heightened security after explosions and defensive interceptions near military facilities. Kuwait and Qatar activated air defense systems and temporarily closed airspace as incoming missiles were intercepted, causing debris-related damage and widespread alarm.

Across the region, airports suspended operations, commercial flights were diverted, and maritime insurance costs rose sharply amid fears of further escalation. Shipping through the Strait of Hormuz is losing insurance as war-risk firms cancel policies. Energy markets reacted immediately to the heightened risk environment, reflecting concerns over infrastructure vulnerability and potential disruptions to shipping routes. Politically, the attacks marked a dangerous widening of the conflict, transforming a confrontation centred on Iran into a broader regional crisis and placing Gulf governments in a precarious position between deterrence, alliance commitments, and the urgent need to preserve economic stability.

Gulf Arab states are operating in a fluid environment, balancing fear of retaliation—missile strikes, drone attacks, or disruptions to maritime trade—with potential opportunities from a weakened Tehran. While the Strait of Hormuz remains open, shipping flows are reduced, and any escalation could trigger sharp reactions in energy markets. Heightened insecurity in the Strait of Hormuz has also intensified pressure on the Red Sea’s shipping lanes, as fears of spillover effects resurface following the strikes. US and Israeli attacks have given Tehran more incentive to restrict or even threaten closure of the Strait of Hormuz, amplifying the Houthis’ leverage over the Bab elMandeb chokepoint between the southwestern tip of the Arabian Peninsula and the Horn of Africa.

Although Iran lacks military supremacy over the US or Israel, it can nonetheless destabilise the region by undermining the image of the Gulf Cooperation Council (GCC) states as bastions of political stability. This morning, Iran launched an assault on 27 military bases in the Persian Gulf and abroad, as well as targeting other vital infrastructure, including Duqm Port in Oman. This case is particularly noteworthy considering Oman has recently served as the primary third-party mediator. Hotels and airports have seen drone assaults, resulting in hundreds of thousands of tourists being stranded in the Persian Gulf while most airports remained closed for many days. The GCC governments seek to avoid engagement in this conflict to preserve neutrality and ensure political stability in the region.

The primary inquiry is the duration for which Iran can sustain its response. If it persists for weeks, it may inflict significant economic damage on the entire area, including US interests. In particular, sustained disruption in the Strait of Hormuz would translate directly into higher energy prices and renewed supply chain strain. Four Asian economies are particularly susceptible to disruptions: Japan, South Korea, China, and India.

A detrimental scenario is the disintegration of the Iranian state and government, resulting in disorder, mass migration, and the emergence of extremist factions, akin to the aftermath seen in neighbouring nations following the US intervention. The diversity of Iran suggests that disintegration of the country is a plausible alternative, primarily due to the Shia Islamic values that have unified society since 1979. The result is likely the desired consequence for Israel from Operation Roaring Lion: a fractured Middle East, akin to the recognition of Somaliland.

Global Reactions

Responses from major powers vary according to strategic alignments. Russia, which has cultivated ties with Tehran, condemned the airstrikes as ‘a pre-planned and unprovoked act of armed aggression against a sovereign U.N. member state’, warning of ‘uncontrolled escalation’ with potential humanitarian, economic, and radiological consequences. China, reliant on Middle Eastern energy and regional stability, strongly condemned the strikes, stating, ‘The attack and killing of Iran’s supreme leader is a grave violation of Iran’s sovereignty and security. It tramples on the purposes and principles of the UN Charter and basic norms in international relations. China firmly opposes and strongly condemns it’.

European governments are navigating a delicate balance between security cooperation with Washington and concern over escalation. French President Emmanuel Macron stated, ‘The Iranian people must also be able to build their future freely. The massacres perpetrated by the Islamic regime discredit it and necessitate that the people be given a voice. The sooner the better’. His words underline support for Iranian self-determination while stopping short of endorsing foreign-led regime change, reflecting a nuanced positioning that condemns repression, suggests concern over escalation, and maintains diplomatic caution. 

Ursula von der Leyen’s social media statement highlighted the need for diplomacy and a ‘negotiated solution’ to Iran’s nuclear ambitions. While her statements, representing the EU’s position, stressed ‘maximum restraint, to protect civilians, and to fully respect international law’, Canadian Prime Minister Mark Carney was unequivocal, declaring that ‘Canada supports the United States acting to prevent Iran from obtaining a nuclear weapon and to prevent its regime from further threatening international peace and security’. Australia also voiced its support for the White House’s military action, with Prime Minister Anthony Albanese affirming Canberra’s backing for efforts to prevent Iran from obtaining nuclear weapons and emphasising the need to avert a wider war

In a complementary show of allied support, Ukrainian President Volodymyr Zelensky posted on X that ‘It is important that the US is acting decisively. Whenever there is American resolve, global criminals weaken. This understanding must also come to the Russians’, highlighting Kyiv’s endorsement of strong US action against perceived threats.

The legal and normative dimensions are equally significant and should not be ignored. Regime change through overt military force challenges principles of non-intervention. While self-defence may justify strikes, encouraging political overthrow introduces more controversial objectives. It remains uncertain, but discussions at the UN Security Council may expose sharp divisions, highlighting a weakening of global consensus on norms governing the use of force.

The Uncertain Outcomes of Regime Change

For the US and Israel, the strategy rests on the belief that dismantling Iran’s leadership could curb nuclear ambitions and weaken regional influence. Yet regime change is inherently unpredictable. Removing a central authority does not guarantee moderation; it may unleash instability or empower even more uncompromising actors.

If the Iranian state fragments or radicalises, the region could enter a prolonged cycle of confrontation. If internal actors navigate succession without collapse, the regime may emerge hardened rather than transformed. Pursuing regime change through airpower alone carries profound risks—reshaping Iran’s political future, regional power dynamics, and the credibility of international norms governing sovereignty and the use of force.

Major questions come to the fore. How will different Gulf states respond to a potentially weakened or more radicalised Iran? Will they exploit new opportunities for influence, or prioritise stability to safeguard trade routes and energy supplies? How might Tehran’s network of proxies recalibrate its posture across Lebanon, Gaza, and beyond? And on the international stage, will global powers coalesce around a new security consensus, or will divisions deepen further, undermining established norms on intervention and sovereignty?

The answers to these questions will shape not only Iran’s trajectory, but the broader balance of power across the Middle East and the strategic judgements of actors beyond the region. In this moment of flux, uncertainty dominates, and the consequences of leadership removal are as much political and institutional as they are military.

About the authors:

• Scott N. Romaniuk—Senior Research Fellow, Centre for Contemporary Asia Studies, Corvinus Institute for Advanced Studies (CIAS); Department of International Relations, Institute of Global Studies, Corvinus University of Budapest, Hungary.
• László Csicsmann: Full Professor and Head of the Centre for Contemporary Asia Studies, Corvinus Institute for Advanced Studies (CIAS), Corvinus University of Budapest, Hungary; Senior Research Fellow, Hungarian Institute of International Affairs (HIIA)