Image from Reuters.

Abstract
The announcement that Serbia has acquired Chinese-made supersonic missiles has triggered concern among neighboring states and Western institutions. In response, Andrej Plenković, Prime Minister of Croatia, stated that Zagreb would alert North Atlantic Treaty Organization (NATO) allies about the development. The episode illustrates broader geopolitical tensions in the Western Balkans, where Serbia’s military modernization increasingly intersects with strategic partnerships with China and Russia. This article examines the implications of Serbia’s missile acquisition for regional security, its relationship with NATO and the European Union, and the enduring legacy of militarization and political mistrust following the Yugoslav Wars.

Introduction
In March 2026, Serbian authorities confirmed that the country had acquired Chinese CM-400 supersonic air-to-surface missiles, making it the first European state known to possess the system. The weapons were reportedly integrated with Serbian MiG-29 fighter jets and are capable of striking targets several hundred kilometers away. (Reuters)

The announcement quickly drew reactions across the region. Croatian Prime Minister Andrej Plenković indicated that Croatia would inform NATO allies about the development, citing concerns about regional stability and the implications of advanced Chinese weapons entering the Western Balkans security environment. (vijesti.me)

The controversy highlights a broader geopolitical question: how Serbia’s evolving military posture fits within a region largely surrounded by NATO members and aspiring European Union states.

Serbia’s Military Modernization and Chinese Technology
The confirmed acquisition of Chinese supersonic missiles marks a significant step in Serbia’s ongoing military modernization program. The CM-400 missile system—developed by China’s aerospace defense sector—can reportedly reach targets up to roughly 400 kilometers away and is designed to strike high-value targets with either blast or penetrator warheads. (Reuters)

Serbia has increasingly diversified its arms procurement in recent years. While maintaining legacy Soviet and Russian equipment, Belgrade has simultaneously purchased Chinese air-defense systems, drones, and Western aircraft such as French fighter jets. This multi-vector procurement strategy reflects Serbia’s attempt to balance relationships with multiple geopolitical partners.

However, Serbia’s choice to acquire advanced missile technology from China has raised concerns among Western policymakers about strategic dependencies and regional security dynamics. European officials have already cautioned that closer military alignment with non-European partners could complicate Serbia’s aspirations for deeper integration with the European Union. (CNA)

Croatia’s NATO Response
Croatia, a NATO member since 2009, views stability in the Western Balkans as closely tied to the Alliance’s broader security framework. Prime Minister Plenković’s decision to alert NATO allies reflects Zagreb’s role as both a regional actor and a participant in NATO’s collective defense architecture. (nato.int)

Croatian officials have expressed concern that the introduction of supersonic missile capabilities into a region still shaped by unresolved political tensions could accelerate an arms competition. Croatian defense officials have noted that such weapons represent “serious weaponry” and have emphasized the need to continue strengthening Croatia’s own defensive capabilities. (N1 Info RS)

Because Serbia is surrounded largely by NATO members—including Croatia, Hungary, Romania, Bulgaria, Montenegro, and North Macedonia—the deployment of long-range strike systems inevitably raises questions about deterrence, escalation risks, and military transparency.

Strategic Ambiguity and Serbia’s Foreign Policy
Serbia’s security policy is characterized by strategic ambiguity. While the country cooperates with NATO through the Partnership for Peace program, it has repeatedly declared that it has no intention of joining the alliance.

At the same time, Belgrade maintains strong political and military relationships with Russia and China. Moscow remains a key diplomatic ally on the issue of Kosovo, while Beijing has expanded economic and technological investments in Serbia.

This geopolitical balancing act allows Serbia to maintain autonomy in defense procurement and diplomacy, but it also raises concerns among Western governments about the long-term strategic orientation of the country.

Historical Context and Regional Sensitivities
The reaction to Serbia’s missile acquisition cannot be separated from the historical legacy of the Yugoslav Wars of the 1990s. Armed conflicts involving Serbian forces in Bosnia and Herzegovina, Croatia, and Kosovo left deep political and social scars throughout the region.

International tribunals later convicted numerous Serbian political and military leaders—including Radovan Karadžić and Ratko Mladić—for war crimes and crimes against humanity linked to those conflicts, including the Srebrenica genocide.

Although the wars ended decades ago, unresolved political disputes and competing historical narratives continue to influence regional security perceptions. Consequently, military developments in Serbia often trigger heightened concern among neighboring states.

Regional Security Implications
The introduction of advanced missile capabilities into the Western Balkans has several potential consequences. First, it may accelerate regional defense spending as neighboring states respond by upgrading their own military capabilities. Second, it could deepen geopolitical competition between Western institutions and non-Western powers in the region.

At the same time, Serbian officials insist that the missile acquisition is purely defensive and intended to deter potential threats rather than signal aggressive intentions. The Serbian government maintains that its military modernization is consistent with sovereign defense policy.

Nevertheless, analysts note that military transparency and confidence-building measures remain essential for preventing escalation in a region with a history of armed conflict.

Conclusion
Croatia’s decision to alert NATO allies about Serbia’s acquisition of Chinese supersonic missiles illustrates the enduring fragility of security relations in the Western Balkans. While Serbia frames its military modernization as defensive and sovereign, neighboring states interpret the development through the lens of historical conflict and geopolitical rivalry.

The episode highlights the intersection of three broader dynamics: Serbia’s strategic balancing between East and West, the increasing role of China in European defense markets, and the lingering legacy of the Yugoslav wars in shaping regional threat perceptions.

Whether these developments lead to renewed tensions or simply reflect normal defense modernization will depend largely on transparency, diplomatic engagement, and the broader trajectory of European security cooperation in the Western Balkans.