NATO's Response to Russian Airspace Aggression Over Poland

On the ninth of September, 2025, Russia issued a deliberate challenge to the NATO alliance. Over the span of a single night, Russia flew over twenty unmanned drones into Polish airspace, forcing the nations of NATO to defend their own collective airspace against an active threat for the first time in the alliance’s 76-year history. The incident rattled NATO’s leaders to their core, not because it was a surprise, but because Russia’s intentions were immediately clear.

It was precisely the attack that NATO had been anticipating, ensuring that Russia could find out whether its pledges of collective defense are real or simply an old, tired charade. NATO must react to Russia’s provocation, and although an early response is already underway, the initial actions alone simply will not be enough. The alliance does not have to launch an attack, nor does it have to end up in a direct war with Russia, but it does have to act decisively to demonstrate that these sorts of provocations will only harm Russia’s own interests.

With ample tools at its disposal, the alliance must make a strategic choice rapidly, before Russia decides to see how much more it can get away with.

The Sequence of Events on the Polish Border

To understand precisely why the NATO alliance needs to act, it is necessary to examine the sequence of events that unfolded in Eastern Europe, and the deeper reasons that those events constitute a major strategic problem. The incidents themselves started on the night of September 9 into September 10, when, over the course of about seven hours, several small swarms of Russian drones violated Polish airspace. Early that night, the drones had seemed as if they were part of a major swarm participating in an attack in western Ukraine, not far from the Polish border.

This is not an uncommon occurrence over the course of Russia’s ongoing invasion of Ukraine. The fundamental problem, however, was that those drones started moving directly into Polish airspace. That is something that might happen very occasionally, when individual drones seem to lose course and wander over the border, but for entire groups of drones to fly over the border is another matter entirely.

The nation of Belarus, where the drones were launched, warned Poland ahead of time that the drones were coming, blaming electronic warfare countermeasures by Ukraine. But that excuse was far from believable, especially considering that multiple groups of drones, separated by multiple hours, continued to fly across the border long after Ukraine had confirmed it was aware of the crossings. The drones that performed the incursion into Polish airspace were from an ultra-cheap line known as the Gerbera, made with little more than Styrofoam and a simple propulsion mechanism.

They operate primarily as decoys, and although they can sometimes be loaded with explosives or reconnaissance equipment, their primary role is to soak up air-defense interceptors. They clear the way for more dangerous drones to move through while air defenses are reloading or tracking too many targets at once. These specific drones did not detonate on Polish territory, but they did fly deep into Polish airspace.

One destroyed the roof of a residential building, another ended up in a civilian yard, and a third landed on a base used by Poland’s territorial defense forces, a national guard equivalent. Polish fighter jets scrambled to respond and monitor the drones as they flew, working with the help of Dutch F-35 stealth jets and the military aircraft of other NATO allies. Fortunately, no casualties were reported in the incident.

However, a few days later, a Russian Shahed 136 kamikaze drone flew into the airspace of Romania, also a NATO ally. Simultaneously, Polish and NATO warplanes had to be scrambled in order to guard against another attack in western Ukraine where drones flew very close to Polish territory. Naturally, Russia denied that the attack was an intentional provocation, seeking to minimize the incident and redirect blame.

Historical Context and the Logic of Probing Attacks

That initial assessment of intentionality was correct, even as Belarus joined in the attempts to explain the incident away. As a chorus of international experts has confirmed, the airspace incursion was almost certainly intentional. Furthermore, even if it were an accident, the strategic reality remains unchanged.

Over the last several years, Western defense leaders have repeatedly explained that they operate under a clear set of assumptions regarding historical context and Russia’s long-term behavior. They understand that Russia, under Vladimir Putin, seeks to threaten the nations of the NATO alliance that were once under Soviet control. Historically, defense planners have recognized that sooner or later, Russia would engage in probing actions that would allow it to measure whether the NATO alliance truly intended to honor its commitments to collective defense.

Under NATO’s Article 5, an attack on one member state is an attack on all, and that principle would, in theory, stop an outside aggressor from attacking any NATO member. But in practice, critics argue the NATO alliance has grown bloated, averse to confrontation, overreliant on the United States, and underequipped for a twenty-first-century conflict. This means there is a real possibility that NATO might hesitate to actually engage in collective defense if it was challenged directly.

According to those same Western defense leaders, Russia has been planning to engage in probing attacks that would be significant enough that, on paper, they should trigger a NATO response. However, these attacks are inherently designed to be vague or technically harmless enough that NATO members could find ways to wiggle out of that collective defense obligation. If those member nations fail to respond to a mild provocation, Putin learns that he can engage in mild provocations whenever he wants.

The adversary then pushes to a medium-size provocation to see whether NATO will also find a way to avoid that proportionate response. If Putin is successful again, NATO’s own institutional logic holds that he will keep on climbing that ladder of escalation. Ultimately, he could march troops into Poland, Finland, or the Baltic states while the alliance just stands aside.

That is a logic that NATO has shared publicly, again and again, for years. It is a set of foundational assumptions that has motivated NATO’s entire push for rearmament, led its militaries to start reinvigorating themselves, and forced Europe to reduce its dependence on the United States. According to the narrative NATO has spent years internalizing, a flight of over twenty drones into NATO airspace followed by denials represents a coordinated and planned Russian test of NATO’s resolve.

Operation Eastern Sentry and the Limits of Mere Reaction

For all practical purposes, it does not matter whether the events of mid-September were a Russian test or an accident. NATO has spent too long repeating the idea that if this were to happen, and NATO were to back down and fail to respond, it would be an undeniable signal to Vladimir Putin that the alliance is weak. Consequently, NATO no longer has the option to abstain from responding without sending that exact message of weakness.

The vast majority of international conflict analysts who can speak freely on these issues agree that the airspace violations almost certainly were not an accident at all. Even if the drone swarms were a genuine error by Russia, Vladimir Putin and the Kremlin would never ignore the opportunity they accidentally created to study NATO’s response to something the alliance already committed to interpreting as an intentional provocation. After the drone swarms in early September, NATO rapidly initiated the first phase of its response, dubbed Operation Eastern Sentry.

A quick-response force of NATO fighter aircraft took positions along the Polish border, including three Rafale jets from France, ten Eurofighter Typhoons from Germany and Britain combined, two F-16s from Denmark plus a naval frigate for air defense, several Gripen jets from Sweden, and Patriot missile defense systems from the Netherlands. Those advanced assets joined F-35 stealth jets that were already forward-deployed to Poland or the surrounding region. They will soon be accompanied by additional F-35s from Norway, and special operators from the Czech Republic.

Concurrently, Ukraine agreed to host Polish defense officials to bring them up to speed on the best anti-drone responses. Poland presented an emergency briefing to the UN Security Council, backed by a number of allied representatives, and Poland closed its border with Belarus during the course of a pre-planned set of joint military exercises conducted by Belarus and Russia. NATO leaders have indicated that over time, Operation Eastern Sentry will integrate additional warplanes, spreading its coverage from the Baltic Sea in the north, to the Black Sea in the south, while also covering Romania, Bulgaria, and the three small, vulnerable Baltic states.

However, although this early response by NATO is meaningful, it comes with critical limitations and arguably does not go far enough. NATO has indicated that it is reacting to Russia’s provocation, proving that its leaders are not completely asleep at the wheel. But a mere reaction is not the same as a definitive response.

If an adversary attempts to provoke a fight, ducking the first punch is merely avoiding a hit. It is the calculated response that decides whether the aggressor will keep swinging or walk away. While Operation Eastern Sentry is a perfectly fine reaction, it would be a massive strategic mistake to let the incident pass without implementing a larger deterrent.

Establishing Proportional Non-Kinetic Responses

When analyzing the alliance’s potential paths forward, it is necessary to establish firm parameters for any response to ensure it does not unnecessarily provoke total war. The only viable responses considered here are those explicitly chosen because they do not involve any action that Russia could reasonably interpret as kinetic, wartime aggression. None of these proportional responses involve any exchange of fire with manned Russian military assets.

Not a single Russian life will come under direct threat through any of these options, and none would involve positioning NATO combat assets on the front lines of the Ukraine conflict, or opening any other front lines where the conflict could violently expand. These options are strictly maintained within a framework that avoids acts of real, warfighting aggression by NATO or its member nations. That being said, it is also important to understand the severe limitations of the idea that NATO should avoid escalation at absolutely all costs.

While NATO should certainly avoid violent escalation, and it should avoid creating a direct kinetic confrontation between its own soldiers and Russian soldiers unless absolutely necessary, remaining entirely passive is dangerous. If NATO is going to properly respond to Russia, instead of merely reacting to the provocation, then NATO or its member states must take action that actively raises the strategic stakes. The core strategic goal is not to simply avoid escalation at all costs; after all, if NATO is paralyzed by the fear of escalation, then Russia has nothing to fear by trampling over the alliance’s sovereign borders.

The true goal is to escalate proportionally, in a way that addresses the specific threat that Russia presented, while providing Russia with clear diplomatic off-ramps to end the cycle quickly and painlessly before it goes any further. By flying its drones into Poland, Russia essentially asked whether it could get away with violating sovereign airspace. Now, NATO’s job is to deliver a firm negative, entirely rejecting the premise of the probe without resorting to disproportionate violence.

In an ideal world, NATO’s response must be firm, clear, and convincing, walking a very fine line of deterrence. NATO must be obvious in its response, acting predictably so that Russia can clearly observe its actions and calculate its next move based on guaranteed consequences. The alliance must make clear to Russia that the wisest course of action is to refrain from these kinds of provocations in the future.

Building on the foundation of Operation Eastern Sentry, there are direct ways to keep NATO’s response rooted firmly in the act of air defense, while taking a more creative interpretation regarding exactly what airspace requires defending.

Expanding Air Defense Buffers and Creative Enforcement

To implement a robust defense without crossing into kinetic warfare, the most conservative option would be to take NATO’s static air-defense batteries, such as its Patriot systems, and position them immediately at the Ukrainian border. They could then simply be allowed to defend the airspace in their full effective radius. Officially, the Patriot system’s maximum effective range is 160 kilometers, or ninety-nine miles.

This means that if a battery were positioned exactly on the Poland-Ukraine border, it could handle incoming threats up to ninety-nine miles into NATO territory or beyond. By strictly deploying air-defense systems to react to Russia’s violation of NATO airspace, any drone or missile entering that range could be legitimately interpreted as a threat to the alliance. Taking that same set of defensive principles, NATO can start incorporating other potential elements into a comprehensive response.

NATO aircraft, flying strictly over NATO territory, can leverage standoff munitions to shoot down drones or cruise missiles that enter their targeting range. If a NATO fighter jet can lock onto a Russian drone, that drone has undeniably come too close to alliance borders, regardless of whose airspace it happens to be flying over at the exact moment of interception. Alternately, NATO can establish a clear buffer zone, formally deciding that because of Russia’s recent incursions, Russian drones simply cannot be allowed within fifty kilometers of NATO airspace.

To facilitate this enforcement and reduce the risk of accidents, NATO nations could close down a corresponding portion of their adjacent airspace. That action would force non-military flights to divert around the established buffer zone. This would carry the added benefit of placing noticeable logistical pressure on Russian commercial air travel, while still remaining too minor an inconvenience for Russia to justify a military escalation.

Pushing the defensive envelope further, NATO could theoretically extend its active air defense mission over specific parts of Ukraine. A less escalatory option might be to secure the airspace above western Ukrainian cities like Lviv and Lutsk, close to the Polish border. A moderately escalatory option could be committing to protect Ukrainian airspace west of Kyiv, where NATO assesses there is simply no tactical reason for Russian drones to operate unless they are attempting to pose a threat to NATO airspace.

This extreme option is already being publicly discussed, with Polish Defense Minister Radoslaw Sikorski calling for NATO to enforce a no-fly zone over most, if not all, of Ukraine’s territory. While there are major financial drawbacks, as NATO only has so many highly expensive interceptors to use against extremely cheap plywood Gerbera drones, the alliance could determine it is worth testing whether Russia will back down when faced with an impenetrable aerial buffer.

Economic Pressure, Maritime Interdiction, and Long-Term Implications

Recognizing the financial trap of using million-dollar missiles against foam drones, NATO has plenty of strategic options that go well beyond a strict commitment to standard air defense. One highly effective response would involve pouring capital into the creation of production lines for the much cheaper air-defense options that Ukraine currently relies on. NATO member nations could solicit the expertise of Ukrainian drone-makers, funneling alliance money into production contracts with Ukrainian companies and footing the bill for a massive expansion of Ukraine’s homegrown defense industry.

Alternatively, Western defense contractors could collaborate directly with Ukraine, using European assembly lines to build Ukrainian-designed interceptor drones. Looking toward the maritime domain, NATO could pivot from air defense entirely to place asymmetric pressure on Russia without risking a continental war. NATO could take a far more active posture in targeting Russia’s shadow fleet, comprising the tankers and bulk carriers that Russia uses to circumvent Western economic sanctions.

NATO could actively interdict these ships, or position warships at the mouths of the Black Sea and the Baltic Sea, stopping shadow fleet vessels while allowing legitimate maritime traffic to pass. While this would push NATO into murky legal waters, Russia operates exclusively in that gray space, and NATO could forcefully demonstrate the consequences of discarding international maritime rules. Additionally, NATO nations could begin actively patrolling the seas immediately surrounding the Russian exclave of Kaliningrad.

If the alliance seeks to manipulate long-term implications, it could surge funding into new defense initiatives and base construction in border zones near Ukraine, Belarus, or Kaliningrad. Establishing permanent infrastructure around the Suwalki Gap, the vulnerable stretch of NATO territory between Belarus and Kaliningrad, would place immense strategic pressure on Russia. Furthermore, if the broader NATO alliance cannot agree on a unified response, individual member states remain well within their rights to act independently.

A Coalition of the Willing, perhaps involving Britain, France, Germany, Finland, Poland, and Canada, could bypass NATO’s bureaucratic hesitations to deter Russia on their own terms. This coalition could help Poland fortify the Suwalki Gap, deploy forces to secure non-combat supply lines inside Ukraine, or guard critical port cities like Odesa away from the active front lines. While many of these robust options remain theoretically possible, military analysts acknowledge they are not highly likely to materialize immediately.

Given the observed historical risk aversion of the NATO alliance, it would not be entirely surprising if Operation Eastern Sentry constitutes the entirety of the NATO response to Russia’s provocation. However, evaluating this comprehensive list of potential responses remains critical, because it is disingenuous and foolhardy for NATO to operate as if these strategic options do not exist. This intentionally vague provocation has placed NATO in a highly difficult position, forcing the alliance to respond to Russia before its broader push for continental rearmament has fully materialized.

An adversary was never likely to wait for NATO to achieve perfect readiness before launching a probing attack. If NATO’s final response turns out to be insufficient, it will not be due to a lack of available tools to stand up to Russia without inviting a continental war. NATO retains the capacity to take action rapidly and decisively to ensure that nothing like this happens again.

If the alliance fails to muster the willpower to enforce its own red lines, whatever horrors transpire in the years to come will have been entirely avoidable.

Sources

1. https://www.economist.com/europe/2025/09/15/the-war-room-newsletter-why-russia-really-sent-drones-into-poland
2. https://www.reuters.com/business/aerospace-defense/poland-downs-drones-its-airspace-becoming-first-nato-member-fire-during-war-2025-09-10/
3. https://www.politico.eu/article/russia-drone-nato-incursions-poland-gaps-western-arsenal/
4. https://www.cfr.org/article/russia-tests-nato-poland-drone-breach
5. https://www.nytimes.com/2025/09/10/world/europe/poland-russia-drones-ukraine-attack.html
6. https://www.abc.net.au/news/2025-09-15/russian-drone-enters-romanian-airspace/105772966
7. https://abcnews.go.com/International/poland-romania-scramble-jets-nato-allies-record-new/story?id=125551928
8. https://www.nato.int/cps/en/natohq/news_237601.htm
9. https://abcnews.go.com/International/eastern-sentry-natos-response-russian-drones/story?id=125576971
10. https://www.reuters.com/world/europe/nato-launches-eastern-sentry-bolster-eastern-flank-after-russian-drone-incursion-2025-09-12/
11. https://breakingdefense.com/2025/09/nato-launches-eastern-sentry-ramping-up-defenses-after-russian-drone-incursion/
12. https://www.france24.com/en/europe/20250912-nato-launches-eastern-sentry-defence-mission-after-russian-drone-incursion-in-poland
13. https://www.abc.net.au/news/2025-09-13/nato-strengthens-eastern-defences-as-russian-drones-enter-poland/105769642
14. https://www.twz.com/air/fighters-frigate-to-help-defend-poland-from-drones-under-new-nato-operation
15. https://www.theguardian.com/world/2025/sep/14/russian-drone-incursion-poland-nato-ukraine-europe
16. https://www.nytimes.com/2025/09/11/world/europe/poland-russia-ukraine-nato.html
17. https://www.politico.eu/article/suwalki-gap-russia-war-nato-lithuania-poland-border/
18. https://www.newsweek.com/russia-test-nato-dud-drones-ukraine-poland-2129561
19. https://www.wired.com/story/russia-hypersonic-missile-test-nato-borders/
20. https://www.bbc.com/news/articles/c80gk57x9rpo
21. https://www.independent.co.uk/news/world/europe/ukraine-russia-poland-romania-nato-drones-map-latest-news-b2827188.html
22. https://nypost.com/2025/09/15/world-news/nato-must-impose-no-fly-zone-over-ukraine-to-protect-from-russian-drones-poland-says/
23. https://www.nytimes.com/2025/09/16/world/europe/ukraine-nato-no-fly-zone-poland.html
24. https://www.washingtonpost.com/world/2025/09/15/poland-ukraine-russia-no-fly-zone/
25. https://www.nytimes.com/2025/09/14/world/europe/romania-drone-russia-ukraine.html
26. https://www.bbc.com/news/articles/c0q719qg1wko
27. https://www.nbcnews.com/world/europe/us-says-will-defend-every-inch-nato-territory-poland-russian-drones-rcna230976
28. https://www.the-independent.com/voices/nato-poland-romania-russian-drones-ukraine-putin-b2827201.html
29. https://www.bbc.com/news/articles/c0lkz2n34z6o
30. https://www.theatlantic.com/international/archive/2025/09/nato-russia-poland/684165/
31. https://www.cbsnews.com/news/poland-russia-trump-putin-ukraine-war-tusk-says-drones-not-a-mistake/
32. https://www.economist.com/leaders/2025/09/10/the-kremlins-plot-to-kill-natos-credibility
33. https://irregularwarfare.org/articles/russias-shadow-fleet-floating-hazard-irregular-warfare/
34. https://www.wsj.com/world/europe/tiny-russian-exclave-flexes-might-in-natos-backyard-d4a88eb8?gaa_at=eafs&gaa_n=ASWzDAix6HYnhQvGt6NdDkxSB1Zi2B2hhIs5rMNxJOBqtVx5VT8TrdJqq6tl2waQZ6Y%3D&gaa_ts=68c9db34&gaa_sig=097LyIiWiqD9Zcm532dD—qMAHfVTcxy7pUz5Wc_pQ9jQ8g30Cfmb9_Twy99l-SMOG1sja9g8dbd_d2Ktdb5ZA%3D%3D