Wars rarely remain limited once regime survival becomes part of the battlefield. The United States and Israel launched what Washington described as Operation Iron Resolve on February 28, carrying out coordinated strikes on targets across Iran, including sites in Tehran linked to missile, nuclear, and command infrastructure. The operation that killed Iran’s Supreme Leader, Ayatollah Ali Khamenei, raises the possibility of a power vacuum at the centre of the Islamic Republic - a development that could transform an already hostile confrontation into a broader regional crisis. If the leadership of the Iranian system itself is now at risk, the conflict moves beyond nuclear deterrence and into a struggle over political survival, where escalation becomes far more difficult to control.
In a televised address shortly after the attacks, U.S. President Donald Trump announced that American forces had begun what he called “major combat operations” alongside Israel, describing the campaign as necessary to eliminate imminent threats posed by the Iranian regime. His remarks, however, went beyond the language of deterrence. Trump urged members of Iran’s security forces to lay down their arms, warned that the leadership would face destruction, and told the Iranian public that “the hour of your freedom is at hand,” suggesting that once the operation was complete, they should take control of their government. Such rhetoric makes clear that the objective extends beyond nuclear enrichment and touches on the political future of the Islamic Republic itself. Once regime survival enters the equation, the logic of the conflict changes, and escalation becomes far harder to contain.
The escalation did not emerge abruptly. For months, the region had been moving toward confrontation. While negotiations resumed under Omani mediation following last year’s short war, with indirect talks held in Muscat and Geneva aimed at reaching a new nuclear agreement, military pressure in the region continued to increase. Talks focused formally on Iran’s nuclear program, but they unfolded under visible military pressure.
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In the weeks preceding the strikes, the United States assembled one of its largest force concentrations in the Middle East in years. Carrier strike groups, including the USS Abraham Lincoln and later the USS Gerald R. Ford, were deployed alongside additional aircraft, guided-missile destroyers, submarines, and layered air-defence systems. Several deployments already in theater were extended, and President Trump publicly gave Tehran a limited window to reach an agreement. When diplomacy is conducted under such deadlines and backed by overwhelming force, the space for compromise narrows. The political cost of appearing weak rises, and escalation becomes more likely if negotiations stall.
This approach reflects a broader shift in U.S. strategy during Trump’s second term, in which pressure and unpredictability have become central tools of policy. The current National Security Strategy emphasises deterrence through strength and treats military posture as a means of shaping negotiations. In practice, this has meant deploying forces while talks were still underway, signalling that diplomacy would proceed only on Washington’s terms. Such a strategy can strengthen bargaining leverage, but it also increases the risk that negotiations collapse under pressure. For Tehran, the growing U.S. presence in the region reinforced the belief that Washington was preparing for confrontation regardless of diplomatic progress, making compromise politically risky and resistance a matter of regime survival.
These developments are consistent with a broader shift in U.S. foreign policy in the Middle East under President Trump’s second term, which has relied increasingly on coercion, military pressure, and transactional diplomacy rather than a stable regional framework. A recent assessment of U.S. policy in the region notes that the administration’s first year combined strikes against Iranian-linked targets, expanded security cooperation with regional partners, and ad-hoc diplomatic initiatives, but produced uneven results and limited long-term stability.
Within this approach, Iran has been framed as the central national security threat, with its nuclear program used to justify escalation even as pressure has failed to produce a durable political settlement. The result is a strategy that seeks deterrence through force, but risks deepening instability and widening the scope of confrontation across the region.
What makes the current confrontation more dangerous than the short but intense conflict of June 2025 is the shift in perceived objectives. Last year’s war revolved primarily around Iran’s nuclear program and the risk of a breakout capability. The strikes then were directed at specific facilities, and Iran’s response remained calibrated, allowing the conflict to be contained. Today, the scope appears broader. Reports indicate that the latest attacks targeted not only nuclear-linked infrastructure but also ballistic missile systems, radar installations, and elements tied to Iran’s military command structure. Combined with open calls for Iranian security forces to defect and for the population to rise against the government, the operation is understood in Tehran as pressure on the regime’s deterrence architecture and political survival. When a state believes its existence is at stake, the incentives for restraint diminish. Degrading facilities is one thing; weakening leadership and command networks is another. Under those conditions, confrontation becomes harder to contain.
Iran’s reaction in the first hours of the confrontation suggests that this will not be a brief exchange of strikes but the beginning of a wider and potentially prolonged conflict. Within hours of the attacks, Tehran launched missiles toward Israel and signalled strikes on U.S. military facilities in the region, including bases in Gulf states hosting American forces. This immediate retaliation was not only tactical but strategic. It demonstrated that Iran intends to respond across the region rather than limit the confrontation to its own territory, reinforcing earlier warnings that any conflict threatening the survival of the regime would be met with broader escalation.
The regional implications are already visible, and the geography of risk is expanding rapidly. The United States maintains a wide military footprint across the Middle East, with forces stationed in Iraq, Syria, Jordan, Saudi Arabia, and the Gulf, alongside major naval assets based in Bahrain and air facilities in Qatar. This distributed presence means that escalation is not confined to a single front but embedded across allied territory. Iranian officials have signalled that U.S. bases and partner states fall within range of retaliation, and reports of strikes, alerts, and heightened security measures across Gulf countries underscore how quickly the confrontation can widen.
The regional dimension of the conflict becomes even more dangerous once the strikes begin to affect the leadership of the Iranian system itself and the stability of Tehran’s regional proxy network. Reports that the latest strikes may have targeted senior figures, including the possibility that Supreme Leader Ayatollah Ali Khamenei was killed, raise the prospect of a power vacuum at the center of the Islamic Republic. Such a development could trigger a succession crisis in Tehran while simultaneously putting pressure on Iran’s regional allies to act in order to preserve the regime’s deterrence structure.
Iranian-aligned armed groups in Iraq have already threatened attacks on American positions, the Houthi movement has signaled readiness to target shipping routes in the Red Sea, and Hezbollah faces growing expectations to respond if the conflict is perceived as an attempt to dismantle the Iranian system itself. While Hezbollah may tolerate limited strikes on Iranian facilities, the elimination of the Supreme Leader would represent a different threshold entirely. A power vacuum in Tehran could therefore push the confrontation beyond Iran’s borders, increasing the likelihood that the United States adopts a more direct and active role across the region, not only against Iran but also against its allied networks. In such a scenario, efforts to curb Hezbollah’s influence in Lebanon and Syria could move from long-standing strategic objectives to immediate military priority, raising the risk that the conflict expands into a broader regional war rather than remaining a contained exchange of strikes.
There is also a risk that the current strategy could produce the opposite of its intended effect. If Tehran concludes that the objective of the campaign is regime collapse, it has little incentive to compromise. Instead, it may accelerate the very programs Washington seeks to stop in order to ensure its survival. At the same time, the United States faces the danger of pursuing multiple objectives -deterrence, negotiation, and political transformation -without a clear path to achieving any of them. Such ambiguity has historically led to prolonged confrontation rather than decisive outcomes.
What is unfolding now is not simply another round of escalation, but the result of a deeper structural shift in the logic of the conflict. Once the possibility of regime collapse and a power vacuum in Tehran enters the equation, the assumptions that once allowed crises to remain limited begin to break down. Pressure on Iran’s regional proxy network, combined with growing calls in Washington to confront those networks more directly, creates conditions in which escalation can spread beyond the original battlefield. Deterrence becomes less reliable, negotiations become harder, and regional actors become more likely to act out of fear that the balance of power itself is being rewritten.
The strikes on Iran may have been intended to restore stability, but they risk setting in motion a chain reaction that neither side can fully control. If the conflict continues to move from nuclear pressure to regime survival, and from bilateral confrontation to regional realignment, the United States could find itself drawn into a wider effort to contain Iran’s allies across the Middle East, including Hezbollah. History suggests that wars fought under such conditions rarely remain small. Once leadership, legitimacy, and regional order are all at stake, escalation is no longer an accident - it becomes a structural risk built into the conflict itself.
Farrah Abdallat is a Research Analyst at Amman-based NAMA Strategic Intelligence Solutions
