Recent U.S. intelligence assessments indicate that Russian President Vladimir Putin could attempt to test NATO’s political and military resolve by launching a limited attack against a member of the alliance within the next several years, according to three sources familiar with the assessments. The intelligence does not represent a prediction that Russia has decided to attack NATO, but rather outlines a potential future scenario in which Moscow could seek to exploit divisions within the alliance and determine how far NATO members would be prepared to go in response to a carefully calibrated military or hybrid operation. According to the assessments, a potential Russian move would not necessarily begin with a large-scale conventional invasion. Instead, Moscow could potentially rely on a limited military incursion, cyberattacks, sabotage against critical infrastructure, drone activity, missile strikes, border provocations or other forms of hybrid warfare designed to remain below the threshold of a full-scale conflict while testing the alliance’s willingness to respond. Such a strategy could create a particularly difficult dilemma for NATO because the alliance’s collective-defence commitment under Article 5 is most clearly applicable to an armed attack, while the response to cyberattacks, sabotage or ambiguous military operations can involve complex political and legal calculations. Russia could therefore seek to exploit uncertainty over how NATO would respond to a limited incident, particularly if the Kremlin believed that some alliance members might favour restraint to prevent escalation while others demanded a stronger military response. The concern comes against the backdrop of Russia’s continuing war in Ukraine and the broader transformation of Europe’s security environment since Moscow launched its full-scale invasion in 2022. NATO has strengthened its eastern flank, increased military deployments and exercises and urged member states to raise defence spending as European governments prepare for the possibility of a prolonged confrontation with Russia. At the same time, Western intelligence agencies have increasingly focused on what they describe as Russia’s use of hybrid tactics, including cyber operations, espionage, disinformation and suspected sabotage, although responsibility for individual incidents is not always publicly established. For European security officials, the central concern is that a future Russian operation could deliberately be designed to remain limited enough to create uncertainty while still demonstrating that Moscow is willing to challenge NATO territory and political cohesion. A small-scale incursion into the territory of an alliance member could therefore have consequences far beyond the immediate battlefield, forcing NATO governments to determine whether the incident constitutes an armed attack requiring a collective response or whether a more limited diplomatic, economic or military reaction would be sufficient. The timing of any potential Russian challenge could also depend heavily on the outcome of the war in Ukraine and Moscow’s ability to rebuild and reconstitute its armed forces. If Russia emerges from the conflict with substantial battlefield experience, expanded military production and the ability to regenerate its forces, Western officials could face a more capable Russian military in the years ahead. At the same time, NATO’s deterrence depends not only on its military capabilities but also on the credibility of its political commitment to defend every member. A perception that the alliance is divided or unwilling to respond decisively could, in theory, create incentives for Moscow to take greater risks. Conversely, a rapid and unified NATO response could strengthen deterrence and demonstrate that even a limited attack would carry significant strategic costs for Russia. The United States would face its own strategic challenge in such a scenario. Washington remains the central military power within NATO while simultaneously confronting security challenges involving China in the Indo-Pacific and maintaining commitments in other regions. Years of military assistance to Ukraine have also placed pressure on some U.S. weapons stocks and defence-industrial capacity, raising questions about how quickly Washington could sustain multiple major security commitments at the same time. For European governments, the issue has reinforced calls for greater investment in air defence, ammunition production, long-range weapons, intelligence capabilities and military readiness. The possibility of a limited Russian attack is therefore being viewed not simply as a question of battlefield strength but as a test of the alliance’s overall resilience. A carefully calibrated operation could seek to exploit political disagreements among NATO members, create uncertainty over the appropriate response and force governments to balance deterrence against the danger of escalation into a broader confrontation between Russia and NATO. Yet a direct attack on a NATO member would also carry enormous risks for Moscow. NATO’s combined military and economic power is significantly greater than Russia’s, and an attack could trigger a collective response that would transform a limited operation into a much wider conflict. For that reason, the most dangerous scenario for European security may not necessarily be a deliberate attempt by Russia to launch a large-scale war against NATO, but rather a limited confrontation that escalates unexpectedly because of miscalculation, political pressure or an inability to control events on the ground. The U.S. intelligence assessments should therefore be understood as a warning about a possible future threat rather than evidence that an attack is imminent or inevitable. Intelligence assessments are designed to identify potential scenarios so that governments can strengthen deterrence and prepare contingency plans before a crisis develops. Ultimately, the trajectory of Russia-NATO relations will depend on the outcome of the Ukraine war, Russia’s military recovery, European defence preparations, U.S. strategic priorities and the political cohesion of the alliance. But the warning highlights a broader shift in Europe’s security landscape: after years of war in Ukraine, NATO governments are increasingly preparing for the possibility that Moscow could seek to challenge the alliance not through an immediate full-scale confrontation, but through limited and carefully calculated actions intended to test how united, credible and willing NATO remains to defend its members.
Putin could attack a NATO country in the next few years, US intelligence assesses
