Projected Military Scenarios of a War Between the United States and Iran and Their Regional Implications
The war between the United States and Iran represents a qualitative shift in the structure of regional security, marking a transition from indirect deterrence to an open, multi-layered conflict.
The conflict has moved beyond a bilateral confrontation to assume the character of a multi-front regional war spanning Iraq, Syria, Lebanon, the Gulf, and the Red Sea.
The behavior of both parties is governed by the dynamics of escalation management, aimed at maximizing impact without triggering an uncontrollable full-scale war.
Structural constraints-political for the United States and economic for Iran-are shaping a form of conflict closer to the management of a protracted crisis than to decisive military resolution.
The paper outlines three principal scenarios: comprehensive regional escalation, a protracted war of attrition, and containment through a phased settlement.
The protracted attrition scenario appears the most likely, as it balances U.S. containment with Iran’s capacity for endurance.
The war has direct implications for global energy markets, maritime corridors, and the stability of fragile states across the region.
Victory in this war is not measured by the scale of destruction, but by the ability to impose political will and reshape the balance of deterrence.
The direct military confrontation between the United States and Iran since late February 2026 constitutes a qualitative turning point in the structure of regional security in the Middle East. The relationship between the two actors has shifted from a pattern of indirect deterrence and proxy competition to an open, multi-layered conflict. This development represents one of the most consequential transformations in the region’s security architecture, owing to the war’s complex nature, in which conventional and unconventional instruments intersect and operational theaters overlap across the region. In turn, this dynamic is reshaping the equations of power and deterrence in ways that extend beyond Iranian geography. The conflict is also closely tied to the security of Israel, maritime corridors, global energy markets, and the stability of fragile states across the Levant and the Gulf.
Within this context, the trajectory of the war cannot be understood merely as an escalatory dynamic; rather, it is shaped by intricate interactions among military capabilities, political constraints, and the behavior of regional and international actors. Accordingly, this paper seeks to analyze the potential military scenarios of the conflict, not only in terms of their operational evolution but also with regard to their strategic implications for the regional order. Particular emphasis is placed on how deterrence, escalation, and proxy warfare interact to produce divergent pathways of conflict.
The relationship between the United States and Iran remains one of the most complex in the contemporary international system, characterized by persistent tension since the Iranian Revolution of 1979. These tensions reached a critical peak with the outbreak of direct military confrontation following the collapse of nuclear negotiations and the escalation of reciprocal military actions. The war has unfolded within an already volatile regional environment, where international and regional interests are deeply intertwined, allowing its repercussions to extend far beyond the two principal actors to encompass the Middle East and the broader global system.
Prior to the outbreak of war, the United States executed its largest military buildup in the Middle East since 2003, encompassing significant naval and air deployments alongside advanced defensive systems. This mobilization served as a clear indicator of the imminence of confrontation. On 28 February 2026, hostilities commenced with joint U.S.–Israeli airstrikes targeting Iranian leadership structures and military infrastructure, triggering a rapid and comprehensive escalation.
Field developments since the onset of the conflict have demonstrated that the theater of operations is not confined to Iranian territory or limited to direct U.S. strikes. Rather, it extends across an interconnected network of arenas, including Iraq, Syria, the Gulf, the Red Sea, and Lebanon. This expansion renders the conflict more akin to a multi-front regional war than a conventional bilateral confrontation, as aerial, missile, naval, and cyber instruments interact with the roles played by allied forces and regional proxies.
The United States has based its military strategy on overwhelming air and technological superiority, conducting precision strikes against first- and second-tier Iranian leadership, as well as key military infrastructure. Particular emphasis has been placed on degrading Iran’s missile and unmanned aerial capabilities, alongside efforts to secure control over strategic chokepoints such as the Strait of Hormuz, given its critical significance to global energy markets. This approach is further associated with attempts to dominate and control Iranian oil and gas resources.
In contrast, Iran has adopted a strategy of broad escalation, grounded in asymmetric retaliation through missiles and unmanned aerial systems. This has included targeting U.S. bases in the region, as well as energy infrastructure-oil, gas, and power facilities-in Gulf states, in addition to certain civilian installations and airports. According to official data reported by the Anadolu Agency, Iran launched approximately 5,558 missiles and drones toward Arab states over 32 days of combat. Concurrently, Iran has sought to expand the scope of the war through its regional allies, aiming to exhaust both its adversaries and neighboring states while imposing a new balance of deterrence. The closure of the Strait of Hormuz has further disrupted a substantial portion of global oil and gas supplies, generating significant volatility in international energy markets.
It is equally important to note that the military behavior of both the United States and Iran cannot be understood in isolation from the logic of escalation management. Each side seeks to maximize military impact while remaining below the threshold that could trigger an uncontrollable, full-scale war. While the United States relies on technological superiority and precision strikes to degrade Iranian capabilities, Iran attempts to offset conventional asymmetries through asymmetric strategies centered on expanding the theater of operations and distributing pressure across multiple fronts.
Despite the ongoing escalation, both Washington and Tehran operate under structural constraints that limit their strategic options. The United States seeks to avoid large-scale ground engagement due to its significant political and military costs, whereas Iran faces economic limitations and internal pressures that constrain its capacity to sustain a prolonged open war. These constraints reshape the dynamics of escalation, rendering the conflict less a conventional war aimed at decisive victory and more an exercise in the management of a protracted crisis.
Accordingly, after thirty-two days of war involving the United States, Israel, and Iran, three principal scenarios may be outlined for the coming period, based on patterns of escalation, the capabilities of the parties involved, and the behavior of regional actors.
The first scenario is one of comprehensive regional escalation. Under this scenario, the war would expand geographically to encompass southern Lebanon, broader involvement by Iraqi Hezbollah factions through intensified attacks on U.S. bases, an escalation in the Houthis operations in the Red Sea, heavier Israeli involvement through deeper strikes inside Iran, and the continued Iranian closure or disruption of the Strait of Hormuz. Such a development would reinforce the logic of a multi-front war, generate a dangerous surge in oil prices, and raise the possibility of a drift toward a quasi-global confrontation through indirect Russian or Chinese involvement.
The second scenario is that of a protracted war of attrition. In this case, U.S. airstrikes would continue without large-scale ground intervention, although limited special or ground operations could be undertaken with regard to securing uranium enriched to 60 percent, estimated at approximately 440 kilograms, possibly including amphibious landings along the Iranian coast or on Kharg Island, while Washington would remain keen to avoid a full-scale ground war. At the same time, the conflict would continue to expand geographically to include Lebanon, Iraq, and Yemen. Iran, for its part, would seek to sustain the tempo of missile and drone attacks, alongside proxy warfare through its regional allies, in order to keep multiple fronts active yet controlled. This would likely result in the gradual attrition of both sides: economic exhaustion for the United States and its allies, military and human losses for Iran, the erosion of regional air defense systems, and persistent disruption to shipping and energy markets. At present, this composite scenario appears the most plausible, as it enables Washington to pursue containment without becoming deeply mired in the conflict, while allowing Tehran to endure without collapsing.
The third scenario is one of containment and phased de-escalation. Its defining features would include an undeclared ceasefire, a gradual reduction in reciprocal strikes, and a return to negotiation channels through mediators such as Pakistan, Oman, or Qatar. The main drivers of this scenario include mounting global economic pressure, particularly through energy markets, U.S. concern over further regional expansion of the war, and Iran’s desire to preserve the regime and avoid sliding into a devastating conflict. The likely outcome would be the consolidation of a new balance of deterrence, the persistence of tension without open war, and the reintroduction of the nuclear file under altered conditions. In this sense, the scenario points neither to decisive victory nor to the collapse of any party. It cannot be ruled out, particularly if Iran concludes that transferring the confrontation to the level of a total rupture in the balance of power would carry intolerable risks.
The war may ultimately contribute to a relative decline in the United States’ standing, driven by growing international opposition and mounting tensions with its allies. In this context, victory cannot be measured solely by the scale of destruction inflicted, but rather by the ability to subdue the adversary’s will-whether through the capacity to occupy and sustain control over territory, or by precipitating regime change and installing a government aligned with U.S. interests.
Amid continued escalation, the future of the region remains contingent upon the ability of the parties to transition from a logic of force to a logic of negotiated settlement. This transition will play a decisive role in shaping the configuration of the regional order in the years ahead. Yet the central question remains whether Iran can impose sustained costs on the United States without crossing critical red lines, and whether Washington can achieve credible deterrence without being drawn into a large-scale ground war.