Introduction

For decades, the Middle East has been understood through the lens of a penetrated regional system (Brown, 1984). In such a system, regional conflicts rarely remain local but are deeply entangled with external powers, whose involvement is either invited by local actors or imposed through broader geopolitical competition. This pattern has long defined the region’s security architecture: local rivalries escalate into proxy conflicts, while stability, however fragile, is ultimately underwritten by external guarantors, particularly the United States in the post-Cold War era.

The ongoing war involving the United States, Israel, and Iran signals a fundamental disruption of this logic. Rather than reinforcing external stabilization, the conflict reveals a transformation in how security is produced, contested, and perceived. Three interrelated shifts are particularly significant: the changing role of external powers as sources of instability, the erosion of credible security guarantees, and the strategic recalibration of regional actors.

The Changing Role of External Powers: From Stabilizer to Catalyst of Escalation

First, the war shows that external powers are no longer merely stabilizers or neutral arbiters but can act as direct catalysts of escalation. The US’s involvement, particularly through strikes on Iranian targets, illustrates a departure from its earlier posture of managed engagement.

During earlier periods, Washington sought to contain conflicts, balancing deterrence with restraint to avoid escalation. This approach was evident in its long-standing containment strategy and, more recently, in the Obama administration’s reliance on diplomacy and calibrated pressure to avert both war and nuclear proliferation (Takeyh, 2006; Parsi, 2017; Nazareth, 2019). Even in moments of acute tension, the US policy prioritized de-escalation and direct engagement, reflecting a commitment to managing rather than intensifying conflict. However, policy shifts under the Trump administration marked a clear departure. By abandoning the JCPOA and adopting a “maximum pressure” strategy, Washington moved beyond containment toward rolling back Iranian influence, embedding coercion at the center of its policy and increasing the risk of broader instability (Simon, 2018; Nazareth, 2019).

This shift is primarily driven by changes in the US global priorities, even as domestic pressures remain relevant. Scholarship on retrenchment suggests that great powers facing relative decline recalibrate grand strategy by reducing commitments in peripheral regions and reallocating resources to more critical theaters (MacDonald & Parent, 2018). Rather than signaling collapse, retrenchment reflects an effort to align ends with means. In parallel, Posen (2007) argues that the United States should limit military activism abroad and focus on core strategic interests, particularly amid intensifying great power competition. Within this framework, the Middle East is increasingly treated as a secondary theater. This reorientation is reflected in withdrawal patterns such as Afghanistan, which indicate resource reallocation rather than battlefield failure (Wardoyo, 2024).

However, retrenchment carries significant implications. Reduced engagement diminishes the capacity for sustained crisis management and encourages a more selective, often reactive, use of force. The result is a paradox: while retrenchment aims to preserve long-term power, it weakens the US’s stabilizing role in regions like the Middle East. What emerges is not disengagement but uneven, episodic intervention, less predictable and more prone to generating instability. In this sense, retrenchment does not remove the United States from the region; it transforms its presence into a more volatile force.

Consequently, the US’s actions appear increasingly reactive and less anchored in a coherent long-term strategy. For regional actors, particularly Gulf states, this creates a paradox: the power that once functioned as the ultimate stabilizer is now perceived as a source of volatility. The Iranian case thus underscores the fragility and possible erosion of the US’s role as a reliable security guarantor.

The New Reality for Gulf Security

For decades, Gulf states such as Saudi Arabia and the United Arab Emirates (UAE) have anchored their security strategies on American protection. This arrangement was not only military but deeply political, reflecting a patron–client relationship in which the US guarantees formed the cornerstone of regional order. Following the Gulf War, Washington institutionalized this role through forward deployments, defense agreements, and extensive arms transfers, embedding Gulf militaries within a the US-led security architecture (Roberts, 2025). This dependence was both material and structural, shaping doctrines, procurement patterns, and regime security strategies. As recent scholarship notes, Gulf security has long rested on this asymmetrical reliance (Bakir, 2025). Yet, as argued by Kausikan et al (2023), shifting global priorities and the US retrenchment have begun to erode the credibility of these guarantees, prompting Gulf states to reassess their dependence and explore alternatives.

What is unfolding is not simply a weakening of the US’s commitment but the gradual unravelling of a deeply embedded security architecture. As Washington recalibrates its global posture, its commitment to Middle Eastern security appears increasingly conditional. Regional allies now face an uncomfortable reality: the guarantor they have long depended on may no longer be willing, or able, to provide the same level of protection. The Iran war amplifies this uncertainty. If the US intervention can trigger escalation without delivering decisive outcomes, and if strategic focus lies elsewhere, the credibility of its guarantees inevitably comes into question. This is not merely perceptual but structural: the reliability of external security provision is now contested.

Iran’s Asymmetric Escalation: Cheap Offense, Costly defense

Third, and perhaps most consequentially, Iran’s response introduces a new dimension to regional security calculations. By targeting not only military assets but also economic and civilian infrastructure, Iran expands conflict beyond conventional boundaries. Evidence shows that Iranian strikes have systematically targeted critical infrastructure across the Gulf, including energy facilities, ports, and logistical nodes; prioritizing disruption over battlefield dominance (Clarke, Hammad, & Wajid, 2026). This reflects a strategy of asymmetric escalation, in which Iran uses relatively low-cost tools such as drones to impose disproportionately high costs on adversaries with far more expensive defense systems (Wardoyo, 2026; Düz, 2026).

The result is a “cheap offense versus costly defense” dynamic that structurally disadvantages Gulf states, forcing them to absorb repeated shocks despite reliance on advanced Western systems. In this context, U.S. security guarantees become increasingly hollow: rather than deterring attacks, they turn Gulf states into frontline targets, as Iran strikes the US-aligned territories to raise the costs of intervention (Clarke, Hammad, & Wajid, 2026). Far from stabilizing the region, this dynamic intensifies vulnerability and exposes the limits of external protection.

Moreover, this development is particularly alarming for Gulf states. Their economic models remain structurally dependent on hydrocarbon activity, which continues to shape growth, fiscal stability, and overall performance despite diversification efforts (IMF, 2025). At the same time, these economies are deeply embedded in global trade and logistics networks, where ports, energy flows, and re-export systems serve as critical nodes linking the region to global markets. These networks are not only central to growth but also highly exposed to disruption (Schneider, 2026). This dependence is reinforced by governance models that rely on externally connected economic systems and state-led coordination of key sectors (Al-Kuwari, 2026).

The result is an economic architecture that is both highly integrated and inherently vulnerable. Disruptions to energy infrastructure, logistics hubs, or trade flows can cascade through the entire system. In this context, the prospect that these assets could become targets raises fundamental questions about deterrence and defense. Security arrangements centered on military protection alone are increasingly inadequate to address vulnerabilities that are economic, systemic, and embedded in global interdependence.

Conclusion

Regional actors are therefore compelled to rethink their strategic positioning. Some may pursue hedging strategies by diversifying security partnerships beyond the US, including limited engagement with China and Russia, or by investing in indigenous defense capabilities to enhance autonomy. At the same time, renewed emphasis on regional diplomacy reflects a recognition that reliance on external guarantors alone is no longer sufficient. Stability may increasingly depend on direct engagement among local actors, including long-standing rivals.

Taken together, these shifts suggest that the Middle East is moving away from the classic model of a penetrated system toward a more complex and uncertain configuration. External powers remain influential, but their roles are less predictable and more contested. Local actors are gaining agency but also bearing greater responsibility. This transition is inherently unstable: the absence of a clear stabilizing force increases the risk of miscalculation and escalation. Yet the diversification of strategies and emergence of new diplomatic initiatives also open pathways toward a more autonomous regional order.

In this sense, the Middle East is no longer simply a penetrated system. It is becoming a laboratory of strategic uncertainty, where old patterns persist, but new logics are taking shape.