A potential U.S. military retreat from the NATO alliance, coupled with Moscow's ongoing shadow war against European democracies, drastically elevates the probability that Vladimir Putin could become the first leader to deploy atomic weapons in the 21st century. According to Spenser Warren, a leading authority on the Kremlin's nuclear arsenal and a Stanton nuclear security postdoctoral fellow at Harvard University’s Kennedy School of Government, this tactical deployment could serve to reconquer territories historically tied to Soviet Russia.

The Crosshairs on the Baltic States

Putin has increasingly fixed his strategic sights on Lithuania, Latvia, and Estonia—nations that successfully decoupled from Soviet control a generation ago. Much like former communist satellite states such as Poland and East Germany, the Baltics integrated into NATO explicitly to forestall any future Russian reconquest. Yet, nuclear intimidation has evolved into a core tactic within Putin's ongoing campaign against Ukraine, a playbook he is anticipated to replicate against subsequent invasion targets.

If Russia has made the (mis)calculation that they should attack the Baltics soon, we should be watching other actions that Russia takes over the coming months. — Spenser Warren

Warren notes that Putin maintains exclusive authority over Moscow's warheads, and the probability of their activation climbs in tandem with his ambition to reconstruct a modern iteration of the Union of Soviet Socialist Republics. Following Ukraine, analysts point to the vulnerable Baltic states as prime objectives, given that their modest military forces are severely outmatched by Russian ground and air power absent direct NATO reinforcements.

Intelligence Warnings and Timeline Projections

High-ranking military intelligence officials within the Danish Defense Intelligence Service recently published stark assessments indicating a rising probability that Russia will orchestrate limited armed incursions against one or more NATO member states situated along its borders, potentially materializing within months. War-gaming analysts at the agency outlined a structured three-phase roadmap for potential Russian aggression:

  • Within approximately six months: Capability to wage a localized war in a bordering nation.
  • Within two years: Readiness for a broader regional conflict spanning the Baltic Sea basin.
  • Within approximately five years: Preparedness for a full-scale war across the European continent.

Much like Adolf Hitler's historical drive to forge a Greater Germanic Reich, Putin remains fixated on leveraging total military might to restore Russia's status as a dominant global superpower. Recalling his address to the Russian parliament, Putin famously characterized the collapse of the Soviet Union as a major geopolitical catastrophe that left tens of millions of compatriots outside Russian borders and infected Russia itself with an epidemic of disintegration.

The KGB Legacy and Strategic Calculus

Emerging from the ranks of the Soviet KGB, Putin's formative years involved state security operations, counterintelligence, and suppression of domestic dissent. His perspective was permanently scarred while stationed in communist East Germany, where he witnessed protesters breaching the Berlin Wall—a heavily fortified barrier defended by guards authorized to shoot defectors attempting to reach Western freedom.

Danish intelligence analysts caution that Putin may gamble on the prospect that targeted armed incursions against the Baltic states will fail to trigger NATO's Article 5 collective defense mandate, particularly if Moscow calculates that the United States will withhold support. Warren concurs that U.S. disengagement signals could accelerate Kremlin invasion schedules while simultaneously lowering the operational threshold for deploying strategic atomic weapons.

Conventional Resilience Versus Nuclear Dangers

When questioned on whether the remaining 31 NATO nations could independently unify to defend an invaded ally and defeat Russia, Warren expressed cautious optimism. “Yes they could,” he projects, “so long as the war remained conventional.” While acknowledging that victory would neither be guaranteed nor painless, he maintains that Russia cannot sustain a victorious war against the combined Nordic military forces, which feature advanced fighter aircraft, modern armor, and rigorous NATO training.

The central uncertainty, however, remains whether the conflict would remain strictly conventional. Warren's doctoral research, Russian Strategic Nuclear Modernization under Vladimir Putin, highlights that Moscow's official nuclear doctrine is significantly more expansive than those governing Western superpowers. In a direct European-Russian confrontation, Warren warns of a massive risk of nuclear escalation driven by Kremlin pressure to prevent conventional defeat, especially if European forces threaten strategic Russian territories like Kaliningrad or St. Petersburg.

French Deterrence and the European Nuclear Umbrella

Heightening these tensions, Putin recently escalated his public rhetoric regarding nuclear readiness via official state channels, taunting Western powers by emphasizing that arsenals capable of global destruction remain a core competitive advantage for Moscow. In direct response, French President Emmanuel Macron executed a high-profile visit to observe the test launch of a nuclear-capable M51 missile from the Le Vigilant submarine off the coast of Brittany.

Lauding the demonstration as a critical milestone against a backdrop of hybrid warfare, Macron continues to expand France's nuclear stockpile—currently estimated by the Federation of American Scientists at approximately 370 total warheads. Demonstrating this commitment, French Rafale jets deployed to northern Sweden, where diplomats explicitly confirmed that the French nuclear umbrella extends to protect allied democracies, potentially positioning France as a de facto leader in European defense security.