By Kautilya The Contemplator, Substack, 5/20/26
The Limits of Symbolic Deterrence
For the Kremlin, there is an increasingly uncomfortable possibility that the deterrence architecture inherited from the Cold War may no longer function against the West. The structure of confrontation itself has fundamentally changed. NATO increasingly operates through distributed gray-zone escalation involving intelligence sharing, satellite targeting assistance and long-range strike enablement conducted through Ukrainian platforms. These mechanisms are deliberately designed to remain beneath the threshold of direct NATO-Russia war.
Some of the developments that have already occurred during this more than four-year conflict would have been considered almost unthinkable during the Cold War and even up until five years ago. Long-range NATO-enabled drone strikes carried out through Ukraine against Russia’s Armavir and Orsk strategic early-warning nuclear radar stations in April-May 2024, the Western-supported Ukrainian incursion into Kursk Oblast in August 2024 and the highly publicized drone attacks against Russia’s strategic bomber fleet in June 2025 represented major breaches of long-standing Russian deterrence warnings.
During the Cold War, attacks connected even indirectly to strategic nuclear infrastructure would have been viewed as carrying immense escalation risks. Yet these actions occurred without direct consequences imposed on the Western states backing Ukraine. From Moscow’s perspective, this may itself represent evidence that Russian deterrent signaling has progressively lost coercive credibility against NATO’s evolving gray-zone strategy.
This growing perception of deterrence erosion is increasingly visible inside Russian strategic discourse itself. One of the clearest examples is Sergei Karaganov, who has openly argued that Moscow’s repeated restraint has encouraged further Western escalation and that Russia must restore fear and deterrence credibility against Europe through more direct forms of coercion. While Karaganov’s views are more extreme than official Kremlin policy, they are significant because they reflect a broader anxiety emerging within Russian strategic circles that deterrence fails when red lines are repeatedly crossed without consequences.
The question increasingly confronting Moscow may therefore is whether symbolic deterrence still imposes meaningful costs on the alliance.
Russian Restraint and the Logic of Containment
Despite extensive Western involvement in the conflict, Moscow has thus far avoided direct attacks on NATO territory. This restraint may reflect a broader strategic calculation that the current structure of the war still favors Russia more than a widened European conflict would.
The Kremlin may likely believe time remains on its side inside the Ukrainian battle space. The war is geographically contained, Russia retains escalation dominance within Ukraine and can continue grinding down Ukrainian manpower and infrastructure without triggering direct confrontation with the full NATO alliance.
At the same time, Moscow almost certainly understands that a strike on NATO territory, no matter how calibrated, could play directly into the hands of the Zelensky regime and the more hardline factions in the West seeking more direct military intervention. Zelensky has increasingly depended politically on the continuation of the war itself, and widening the conflict has long been one of Kiev’s clearest strategic objectives. Direct Russian attacks on alliance territory could therefore alter the war in Kiev’s favor while triggering escalation dynamics that rapidly exceed political control.
Moscow may also calculate that direct strikes on NATO territory would not begin Europe’s militarization, but complete its political consolidation by turning an already accelerating rearmament project into a wartime consensus with far less public resistance. Such attacks could remove remaining hesitation, silence internal dissent and boost the already dismal public opinion approval ratings of leaders across the continent.
For now, Moscow may calculate that ambiguity serves it better than open confrontation. Cyber operations, sabotage, battlefield escalation inside Ukraine and pressure on European infrastructure allow Russia to impose costs while avoiding direct NATO-Russia combat. A wider war would also stretch Russian logistics, air defense systems and force deployments far beyond the Ukrainian theater.
Yet prolonged gray-zone warfare creates pressures of its own. The longer Western-enabled attacks inside Russia continue without direct consequences for NATO states, the greater the pressure on Moscow to restore deterrence credibility while still attempting to keep escalation controlled.
The Return of the Berlin Problem
The historical precedent for this escalation dilemma emerged during the Cold War confrontations surrounding Checkpoint Charlie and divided Berlin. American and Soviet planners understood that even a localized clash between forward-deployed forces could trigger an uncontrollable escalation cycle between nuclear powers.
This fear became especially acute during the Berlin Crisis of 1961 and the Cuban Missile Crisis in 1962. Inside the Pentagon, strategists repeatedly war-gamed scenarios in which a limited confrontation spiraled beyond political control. During ExComm discussions, the logic of escalation was captured with chilling clarity:
Robert Kennedy: “What do we do when … he moves into Berlin?”
Robert McNamara: “Well, when we’re talking about taking Berlin, what do we mean exactly? Do they take it with Soviet troops?”
President John F. Kennedy: “That’s what I would see, anyway.”
McNamara: “I think there’s a real possibility of that. We have U.S. troops there. What do they do?”
General Maxwell Taylor: “They fight.”
McNamara: “They fight. I think that’s perfectly clear.”
Kennedy: “And they get overrun.”
McNamara: “Yes, they get overrun, exactly.”
Robert Kennedy: “Then what do we do?”
Taylor: “Go to general war, assuming we have time for it.”
Kennedy: “You mean nuclear exchange?”
Taylor: “Guess you have to.”1
The terror inside these discussions was not merely the prospect of war, but the realization that escalation could acquire its own momentum once direct combat between superpowers began.

The same dilemma was later captured satirically in the British series Yes, Prime Minister, where the logic of “salami tactics” exposed the central problem of deterrence: if an adversary escalates incrementally rather than through all-out attack, at what point does the alliance actually risk nuclear war?
That same dilemma may now be reemerging in a different form.
The Escalation Ladder: From Demonstration to Retaliation
One possibility increasingly discussed within strategic circles is a Russian nuclear detonation for demonstration purposes. Rather than immediately attacking NATO territory, Moscow could attempt to restore deterrence credibility through a dramatic act of coercive signaling short of battlefield nuclear use. Professor John Mearsheimer has repeatedly suggested that Russia could eventually resort to a demonstration detonation in order to restore fear and deterrence credibility against the West.
Moscow could theoretically detonate a tactical nuclear weapon at a remote site such as Novaya Zemlya near Europe’s northern flank without directly attacking NATO territory. The objective would not be battlefield destruction, but psychological shock: forcing European governments and publics to confront the reality that nuclear escalation may no longer remain safely abstract.
Such a demonstration might create an immediate crisis inside NATO. Some states, notably the Eastern Europeans and the Baltics, would likely demand stronger military escalation and reinforcement, while others in Western Europe may push urgently for de-escalation out of fear that the next threshold could involve actual battlefield nuclear use. A demonstration detonation would not destroy NATO militarily, but it could fracture the alliance politically by forcing it to answer a question long kept theoretical: how does one respond to nuclear use intended not for warfighting, but coercive signaling?
If such a demonstration failed to alter NATO behavior, pressure could emerge inside Moscow for more direct forms of retaliation. Imagine a hypothetical scenario in which Russia conducts a precision strike against a military site in Poland or the Baltic states used for operational support to Ukrainian attacks inside Russia. The target is not American forces, but a French, German or British deployment hub. Moscow frames the strike not as an attack on NATO itself, but as retaliation against states directly participating in hostilities against Russia.
Such a strike would represent a major escalation. Yet its real significance would lie in the political dilemma that follows: would the United States truly risk direct war with Russia over the destruction of a European military base in the Baltics? The answer is less obvious than public NATO rhetoric suggests.
Washington today faces mounting strategic overstretch. The United States remains heavily engaged in the Middle East while simultaneously preparing for long-term competition with China in the Indo-Pacific. A direct war with Russia would consume enormous resources while creating escalation dynamics that could rapidly exceed political control.
Yet failing to respond could be equally catastrophic. If Washington responded only symbolically, or attempted to avoid escalation altogether, the consequences for NATO could become historically transformative. Article 5 would suddenly appear conditional rather than absolute. European governments would begin reassessing whether the American nuclear umbrella is genuinely automatic or ultimately discretionary. Moscow, meanwhile, might conclude that calibrated retaliation works precisely because NATO fears direct war more than Russia fears controlled escalation.
This is precisely the escalation dilemma that haunted Cold War planners during Berlin.
India and the Normalization of Threshold Crossing
Yet the assumption that nuclear deterrence permanently prevents calibrated retaliation has already been challenged elsewhere. An important modern precedent emerged in the long confrontation between India and Pakistan. For decades, Pakistan relied on nuclear deterrence to wage a low-intensity proxy war against India in Kashmir under the assumption that New Delhi would avoid escalation for fear of nuclear conflict. This created what Indian strategists described as the “stability-instability paradox”: nuclear stability enabling persistent proxy warfare beneath the nuclear threshold.
For years, this strategy constrained the Indian response. That calculus gradually changed under the government of Prime Minister Narendra Modi. After the Uri attack in 2016, India crossed the first threshold through Special Forces raids on terrorist launchpads across the Line of Control. Following the Pulwama attack in 2019, India crossed a second threshold by conducting precision air strikes in retaliation against terror camps on the other side.
The largest escalation followed the 2025 Pahalgam terror attacks against civilians and India’s retaliation through Operation Sindoor. Unlike the earlier episodes, the crisis evolved into the largest engagement ever between the Indian and Pakistani air forces. India ultimately degraded Pakistan’s air defense network and carried out strikes on major Pakistani air bases before Islamabad sought a ceasefire.2
In all three cases, India’s retaliation remained calibrated and limited. Yet the broader significance was the gradual normalization of increasingly overt retaliation beneath the nuclear threshold: first cross-border raids, then precision strikes and finally sustained conventional escalation.
This precedent matters because Russia may eventually reach a similar conclusion regarding NATO’s gray-zone war structure. If Western-enabled attacks inside Russia continue expanding without consequences for NATO states, Moscow may increasingly conclude that calibrated retaliation carries lower strategic costs than indefinite restraint.
The Danger Beyond the Gray Zone
The central danger emerging in Europe is not simply escalation itself, but the gradual erosion of deterrence credibility under conditions of prolonged gray-zone war.
History suggests that states confronting persistent proxy or indirect attacks eventually begin reconsidering thresholds once thought too dangerous to cross. India progressively normalized retaliation beneath the nuclear threshold against Pakistan. Iran similarly demonstrated how prolonged confrontation can gradually erode the credibility of an American security umbrella once an adversary becomes willing to impose direct costs.
Russia may eventually reach a similar conclusion if Western-enabled attacks deep inside Russian territory continue expanding without direct consequences for NATO states. Scenarios such as a demonstrated nuclear detonation or limited retaliation against NATO infrastructure would likely emerge from an attempt to restore deterrence before escalation spirals further.
This, however, is precisely what makes the situation so dangerous. Measures intended to reinforce deterrence can themselves become the next rung on the escalation ladder. The longer gray-zone warfare persists without a stable strategic equilibrium, the greater the possibility that Russia concludes symbolic warnings are no longer sufficient and that deterrence must instead be demonstrated through action.
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