Recent U.S. intelligence assessments indicate that Russia could potentially deploy an armed group to occupy NATO territory within weeks, a shift from prior beliefs that such a provocation would be unlikely while Russia is engaged in Ukraine. According to reports, this assessment changed this year, with NATO members observing what they believe to be probing attacks by Russia aimed at testing and potentially fracturing the alliance.

NATO's Allied Joint Force Command Brunssum has noted an increase in defensive scrambles, with Western fighter jets being deployed to intercept drones approximately 250% more frequently in July compared to the previous year. Ukraine also recently intercepted a drone that had crossed into Romanian airspace. These incidents highlight Russia's aggressive stance and its testing of Western defenses.

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The potential threats outlined by U.S. intelligence assessments, as reported by The Wall Street Journal, range from cyberattacks on NATO countries to the deployment of unmarked armed groups for territorial occupation, or limited incursions along the alliance's eastern flank. The projected timeframe for such a Russian move is estimated to be between autumn of the current year and 2029.

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NATO spokesperson Col. Martin O'Donnell stated that the alliance is constantly evaluating and preparing for various scenarios, asserting that NATO is vigilant and ready to deter and defend as necessary. These warnings coincide with U.S. concerns regarding a shortfall of munitions, stemming from aid to Ukraine and involvement in Middle Eastern conflicts.

One theory suggests that Putin might attempt to seize a city or region in Poland or one of the Baltic states—Estonia, Latvia, or Lithuania—all of which are NATO members and strong supporters of Ukraine. Lithuanian President Gitanas Nausėda has voiced concerns about potential "kinetic operations," likely targeting critical infrastructure, though not on a large scale. Russian opposition figure Garry Kasparov also believes the chances of Putin crossing NATO borders, possibly with small incursions using drones into Estonia, Latvia, Lithuania, or Poland, are growing, driven by a need for a winning narrative.

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In response to these perceived threats, the Baltic states have bolstered their border defenses against Russia and its ally, Belarus.