By Muad Zaki,

Senior Fellow at Asia Middle East Center

The latest escalation in the Middle East offers an important reminder that modern conflicts rarely remain confined to the region in which they begin. In an era of globalized transportation networks, interconnected supply chains, and expanding military alliances, regional wars can rapidly produce worldwide consequences.

The recent confrontation involving the United States, Israel, and Iran demonstrates how quickly these ripple effects can emerge. Within days of the escalation, airspace closures across much of the Middle East disrupted one of the world’s most critical aviation corridors linking Europe and Asia. Airlines were forced to reroute or cancel thousands of flights, leaving passengers stranded and driving up travel costs across long-haul routes.

For Southeast Asia, such disruptions carry immediate implications. The Middle East serves as a major transit hub connecting European travelers with tourism destinations across ASEAN. When these routes are interrupted, the economic consequences spread quickly through the region’s tourism sector, aviation industry, and broader service economy.

Beyond these economic disruptions, the crisis also raises deeper questions about how military alliances and foreign basing arrangements can expand the scope of conflicts far beyond their original geography.

International Law and the Expansion of Conflict

Under the United Nations Charter, the use of force between states is generally prohibited except in cases of self-defense. Article 51 recognizes the inherent right of states to respond militarily if they believe they have been subjected to an armed attack.

Once a state invokes this right, however, the geographic scope of confrontation can expand quickly. If military operations are supported through infrastructure located in allied countries — including foreign bases, intelligence facilities or logistical hubs — those installations may become part of the operational landscape of retaliation.

This dynamic helps explain how regional conflicts can widen beyond their original battlefield. When military alliances involve shared infrastructure and operational support across multiple countries, retaliation may extend to facilities located outside the territory of the primary belligerents.

For Southeast Asia, this legal and strategic dynamic is particularly relevant. As security cooperation with extra-regional powers expands, infrastructure located within ASEAN states could become increasingly integrated into wider military architectures. In a major power confrontation, such integration may expose countries in the region to escalation risks that originate far beyond Southeast Asia.

Immediate Economic Ripple Effects

While the legal debates surrounding the conflict continue, the economic consequences were visible almost immediately.

Airspace closures across parts of the Gulf forced airlines to divert flights around the conflict zone, increasing travel times, raising fuel costs, and reducing flight capacity across long-distance routes.

Within days, global travel markets reacted. Airlines canceled flights, ticket prices increased, and tourism operators began warning of potential slowdowns in international travel.

For Southeast Asia, these disruptions are particularly significant. Tourism-dependent economies such as Thailand, Malaysia, Indonesia, and Singapore rely heavily on visitors from Europe and the Middle East. When flights between these regions are disrupted, tourism flows decline and hospitality industries quickly feel the impact.

Maritime trade has also been affected. The Strait of Hormuz remains one of the world’s most critical maritime chokepoints for both energy supplies and international trade. Rising tensions in the region have already prompted shipping companies to reassess routes and increase insurance premiums for vessels operating in the area.

For export-oriented Asian economies, disruptions to global logistics networks translate into higher transportation costs, delayed shipments, and increased uncertainty in supply chains.

In short, a regional military confrontation can rapidly produce global economic consequences.

Strategic Implications for ASEAN

For ASEAN policymakers, the deeper lesson from the Middle East crisis concerns the long-term risks associated with alliance structures and foreign military basing arrangements.

Southeast Asia has historically pursued a strategy of strategic neutrality. By avoiding deep alignment with competing geopolitical blocs, ASEAN has been able to maintain regional stability while engaging economically with multiple major powers.

This balancing strategy has allowed ASEAN states to benefit from economic ties with China while maintaining security cooperation with the United States and other partners.

However, neutrality can erode gradually.

Security agreements often begin as limited cooperation—joint military exercises, maritime patrols, or defense dialogues. Over time, these arrangements can evolve into deeper military integration involving expanded basing access, intelligence infrastructure, and logistical networks.

Once foreign military infrastructure becomes embedded within national territory, a country’s strategic autonomy may begin to narrow. In the event of conflict between major powers, such facilities could become integrated into broader military operations.

The Middle East crisis illustrates how quickly these dynamics can unfold. Within just days, the consequences of the conflict spread beyond the battlefield, affecting global travel networks, shipping routes, and economic markets.

For Southeast Asia, this underscores the risks associated with becoming structurally embedded within the military architectures of external powers.

Policy Advice for ASEAN

The unfolding crisis in the Middle East highlights the importance of preserving ASEAN’s strategic autonomy in an increasingly volatile geopolitical environment.

First, ASEAN governments should carefully reassess deeper participation in U.S.-led security arrangements that could gradually embed the region within external military architectures. While security cooperation may offer short-term benefits, foreign basing arrangements or operational military partnerships may expose ASEAN states to greater risks if conflicts between major powers escalate.

Second, ASEAN policymakers should review the region’s structural dependence on access to the U.S. consumer market. In an era where economic relations are increasingly shaped by geopolitical considerations, particularly as Washington’s Middle East policy remains closely aligned with Israel, overreliance on a single external market may create long-term strategic vulnerabilities.

Third, ASEAN should strengthen regional resilience by diversifying both its economic partnerships and its security dialogues. Greater engagement with neighboring powers, including China, alongside stronger intra-ASEAN economic integration, may provide a more balanced foundation for regional stability.

At the same time, ASEAN policymakers must recognize that threat perceptions within the region are not uniform. Several member states remain primarily concerned with maritime disputes in the South China Sea, while others place greater emphasis on maintaining neutrality amid intensifying major-power rivalry.

Recent developments in the Middle East also illustrate how the strategic priorities of external powers can shift during crises. In the current confrontation involving Israel and Iran, U.S. military resources have been deployed primarily to defend Israel and support Israeli security operations, even as tensions across the Gulf have raised concerns among Washington’s traditional regional partners. This dynamic highlights the reality that the security priorities of external powers are ultimately shaped by their own alliances and geopolitical calculations.

For ASEAN, these developments underscore the importance of reassessing long-standing assumptions about external security guarantees. Strengthening regional cooperation and maintaining strategic autonomy within Asia may provide a more stable foundation for Southeast Asian security than reliance on external powers whose priorities can change rapidly during international crises.

Preserving ASEAN’s long-standing strategic autonomy will require careful calibration of external partnerships so that Southeast Asia remains a center of stability rather than a frontline in great-power rivalry.