After the incursion of at least 19 presumed Russian drones in eastern Poland, Warsaw reacted. Indeed, on the night of September 10 to 11, 2025, it activated NATO’s Article 4. This activation was in response to Russian drone incursions in Poland. While Moscow claims the interception of 221 Ukrainian drones from September 11 to 12, Paris takes measures. Indeed, it summons the Russian ambassador and deploys three Rafale. Additionally, Brussels and London tighten sanctions. In Minsk, the "Zapad 2025" exercise fuels fears of an escalation.
Poland: tense situation as of September 12, 2025 (CEST) after Russian drone incursions
On the night of September 10 to 11, 2025, at least 19 presumed Russian drones entered Polish airspace. Indeed, they crossed this space in the east, near the borders with Belarus and Ukraine. Warsaw claims to have shot down several aircraft and recovered debris on its territory, with no casualties reported. Poland triggered NATO’s Article 4 (allied consultations) and imposed temporary airspace restrictions including a drone flight ban and a local no-fly zone on the eastern strip. On the night of September 11 to 12, 2025, Russia declared having intercepted 221 Ukrainian drones targeting the regions of Moscow and Saint Petersburg, with a fire reported around the Primorsk oil port (Baltic Sea), quickly contained according to local authorities.
Reactions and decisions of the capitals
Warsaw requested an emergency meeting of the UN Security Council. It is scheduled for September 12 (New York time). Indeed, the government considers this event a deliberate provocation. Donald Tusk and Radosław Sikorski rejected the hypothesis of an "error" put forward by Donald Trump. On September 10, Poland triggered Article 4: NATO opened consultations and reinforced air policing with F-16, F-35, AWACS, and tanker resources. Mark Rutte calls for vigilance and allied cohesion. Germany announces increased air policing over Poland, Netherlands and Spain have summoned Russian representatives.
France summoned the Russian ambassador in Paris and deploys three Rafale to contribute to the coverage of the eastern flank. The European Union extends its regime of individual sanctions for six months (more than 2,500 people and entities). The United Kingdom unveils about 100 new targets, including ≈ 70 ships of the phantom fleet and suppliers of components (electronics, chemicals, explosives). Moscow denies any intention to strike Poland.
Moscow, Kiev, and the drone battle
The Ukrainian campaign of drone strikes targets Russian refineries, terminals, and logistical nodes. It aims to reduce Moscow’s war effort by transferring the strategic cost to the hinterland. On the Russian side, the response combines anti-aircraft defense, jamming, and digital jamming zones around sensitive infrastructures. The figures put forward by the belligerents often diverge. They illustrate a war of attrition. The proliferation of low-cost devices forces the adversary to mobilize much more expensive resources.
In Primorsk, at the heart of Russia’s Baltic energy, warning signals have followed one another in recent weeks: vulnerabilities of pipelines, redirections of oil flows from Ust-Luga, and risks of environmental spills in case of damage to coastal installations.
Poland: immediate measures and NATO framework
The activation of Article 4 by Poland opens consultations when an Ally believes its security is threatened. It does not automatically involve collective defense operations. These fall under Article 5, but allow for coordination of surveillance. Moreover, they facilitate rules of engagement and potential reinforcements. This is the approach Warsaw has chosen. Additionally, it has tightened its air regulations in the east. This includes exclusion zones, restrictions for light aviation and unmanned systems.
On the NATO side, Secretary General Mark Rutte called for caution and cohesion among Allies. Furthermore, he reminded that any attack against a member would be "devastating" for the aggressor. Additional patrols and ISR resources (surveillance, intelligence) are integrated into the coverage of the eastern flank.
Paris, Brussels, London: diplomacy and economic pressure
France combines a diplomatic response (summoning the Russian ambassador) and an aerial contribution (3 Rafale) to the allied posture. In Brussels, the EU extends its restrictive measures targeting more than 2,500 people and entities linked to the aggression against Ukraine. These measures include asset freezes, travel bans, as well as financial and technological limitations. In London, the government announces a new wave of sanctions against the phantom fleet transporting Russian oil. These ships operate under flags of convenience. Additionally, these sanctions target suppliers of electronic, chemical, and explosive components intended for the arms industry.
Stated objective: dry up the flows fueling the Russian war machine and increase the cost of circumventions.
"Zapad 2025": scenario framework and escalation risks
The "Zapad 2025" maneuvers take place from September 12 to 16 near Minsk and on several training areas in Belarus. Officially planned long ago and of reduced scale compared to 2021, they occur nonetheless amid rising tensions. Their proximity to the Polish border, combined with drone incursions and Ukrainian counter-strikes, maintains a gray zone conducive to miscalculations, the major risk pointed out by chancelleries.
Intention or error? Irreconcilable versions
Moscow denies any Polish intent and mentions technical drifts. Warsaw speaks instead of deliberate action. Donald Trump suggested it could be an error, which Prime Minister Donald Tusk publicly denied by recalling the coordinated nature of the incursion. In the absence of published independent elements, Polish authorities maintain the hypothesis of a test of allied defenses on the eve of "Zapad 2025".
International law and security: Article 4 vs Article 5
Article 4 of the North Atlantic Treaty provides for consultations. This occurs when the territorial integrity or security of an Ally is threatened. It has been used several times since 2003 (southern flank, Turkish border, Baltic crises). Article 5, on the other hand, is only triggered in the face of a proven armed attack, forming the basis of collective defense. Poland is currently adhering to Article 4, to avoid over-interpretation while obtaining reinforcements for surveillance and interception.
Economy and energy: Baltic ports and "phantom fleet"
The strikes and sabotages targeting Russian refineries, pipelines, and terminals have already disrupted Moscow’s logistical patterns (rerouting to Primorsk and Novorossiisk, fluctuations in flows through Ust-Luga). Conversely, targeting the phantom fleet aims to tighten the noose around Russian oil revenues. These dozens of tankers operate outside Western insurance standards and under flags of convenience. Western authorities hope to increase the cost of circumvention and limit Moscow’s ability to finance its war effort.
Avoiding escalation
In the very short term, Allies favor a graduated deterrence: maintaining a high air presence on the eastern flank, calibrated public messages to avoid any overreaction, and increased anti-drone interoperability (shared detections, electronic countermeasures, low-cost effects to save surface-to-air missiles). In parallel, diplomatic safeguards are maintained with Moscow and Minsk to defuse potential incidents during "Zapad 2025". Finally, the EU and the United Kingdom strengthen energy traceability (flags, insurance, traders) to tighten the noose around the phantom fleet.