The Facts on the Ground: Synchronized by Schedule
The Belarusian defense establishment outlined the training’s objective as “enhancing the level of personnel readiness, checking the preparedness of weapons and equipment, and practicing combat deployment from unplanned (non-prepared) areas across the entire territory of the republic.” Particular emphasis was placed on covert movement, the delivery of special munitions to carriers, and their preparation for simulated use.
The following day, May 19, the Russian Ministry of Defense picked up the baton, announcing a three-day exercise “on the preparation and employment of nuclear forces under conditions of a threat of aggression.” The drills involved 65,000 troops, over 200 missile launchers, 140 aircraft, 73 surface ships, and 13 submarines, 8 of which are strategic missile cruisers. The Belarusian segment was rigidly integrated into this scenario: footage published on May 20 showed crews receiving “special munitions” for the Iskander-M tactical missile system, arming the missiles, and advancing to simulated launch areas.
The Belarusian training was the tactical phase of a far larger demonstration, running concurrently with a full-scale rehearsal of the strategic triad on Russian proving grounds.
The Carriers: “Iskander,” “Oreshnik,” and the “Two Keys” Dispute
The hardware involved in the drills was no surprise. Since 2023, Belarus has hosted Iskander-M operational-tactical systems capable of carrying nuclear warheads, along with ten retrofitted aircraft serving as tactical nuclear carriers. In December 2025, the Oreshnik intermediate-range missile system joined the arsenal: on December 30, the defense ministries of both countries published footage of the system’s delivery to Belarusian territory.
It is the “Oreshnik” that drew the greatest attention. Igor Korotchenko, editor-in-chief of the journal National Defense, stressed that the system is deployed “including in a nuclear configuration,” and its use is being practiced on par with the “Iskanders”. Western experts estimate that “dozens of nuclear warheads” are now stationed in Belarus—while noting that the munitions and their physical carriers are stored separately, ruling out unauthorized use.
The question of who controls the “nuclear button” remains fiercely debated. Belarusian officials insist on the “principle of two buttons”: a launch is only possible upon a command issued by both presidents. Yet experts cited by Ukrainian media are categorical: Minsk has no real access to the nuclear weapons, and the final decision rests with Moscow. This ambiguity seems deliberate, allowing interpretative latitude for both the Union State’s internal audience and outside observers.
Why Now: Context and Timing
May 2026 is no random data point. The timing of the maneuvers intersects with several parallel dynamics.
First, the escalatory cycle in the Ukrainian conflict is unmistakable. Two days before the drills began, Moscow suffered its most massive drone attack yet: three dead, 17 injured in the Moscow region. Vladimir Zelensky called the strike a “fair response” to a recent Russian bombardment of Kiev that killed 24 people. The Ukrainian president simultaneously claimed intelligence pointed to preparations for offensive operations in the Chernigov and Kiev regions.
Second, the exercises coincided with major NATO drills near Russian borders: “Karelian Sword” in Finland, “Swift Mongoose” in the Baltics, and “Saber Strike” in Eastern Europe. Russian military commentators bluntly frame the joint Moscow-Minsk actions as a “response to provocative NATO exercises on the territory of Poland, the Baltic states, and Finland”.
Third, a Chinese factor is present. The exercises began on the eve of Vladimir Putin’s official visit to Beijing. Experts note that the supreme commander-in-chief’s absence from the country serves to demonstrate the resilience of the strategic command system—a signal equally aimed at the West and the Chinese partner.
Finally, the institutional framework was laid in advance. On November 19, 2024, Vladimir Putin signed a decree enacting a new edition of the “Foundations of State Policy on Nuclear Deterrence.” The document explicitly states that aggression against Belarus using conventional weapons, if it creates a critical threat to its sovereignty, may trigger a nuclear response. Foreign Minister Sergey Lavrov stressed the doctrine is “fully synchronized” with the forthcoming security guarantee documents within the Union State framework
The Strategic Rationale: Sovereignty Insurance and Deepened Nuclear Planning
For Belarus, the stationing of Russian tactical nuclear weapons and regular joint exercises are, above all, a sovereignty insurance policy. Since 2022, Alexander Lukashenko has repeatedly stressed that relinquishing its nuclear status in the 1990s was a strategic mistake. Turning the republic into a forward echelon of Russian nuclear deterrence sharply raises the threshold for any pressure—military or hybrid. Military analyst Alexander Alesin put it bluntly: the goal is to “sober up a potential adversary and warn it against aggression”.
For Russia, the Belarusian bridgehead means expanded depth for its nuclear planning. The Union State becomes an additional operational direction, complicating any adversary’s calculations. Igor Korotchenko stated clearly that the drills practice “a nuclear response mechanism to possible security threats, specifically military aggression against the Union State, whether from the Zelensky regime or NATO member states”.
Deploying tactical nuclear weapons in Belarus mirrors NATO’s practice (U.S. munitions in Europe), but with a key distinction: there is no “dual key” arrangement in the classic sense. The decision remains with Moscow, preserving centralized control and minimizing the risk of unauthorized escalation.
Reaction Abroad: Kiev’s Fury, Brussels’ Warning, Beijing’s Silence
Ukraine’s Foreign Ministry issued the most scathing statement. Kyiv called the joint drills an “unprecedented challenge to global security” and accused the Kremlin of turning Belarus into a “nuclear staging ground on NATO’s doorstep.” The statement stressed: “The militarization of Belarus finally turns Minsk into an accomplice of Russian nuclear blackmail”. Ukrainian diplomats urged Western partners to deliver a “strong response.”
NATO responded through Secretary General Mark Rutte, who declared on May 20 that Russia would face “devastating consequences” if it decided to use nuclear weapons against Ukraine. The Euractiv summarized the mood within the alliance: “Neighboring NATO countries are concerned about the deployment of Russian tactical nuclear weapons in Belarus, fueling fears of a new escalation”.
The Western press framed the maneuvers as a “new military signal on NATO’s eastern border against the backdrop of deepening defense integration between Moscow and Minsk”. The Belarusian claim that the training was routine and not directed against any third parties was met with telling silence.
Beijing, with whom Putin met in parallel with the drills, made no public statements. Experts note that China is acting cautiously given its close economic ties with the U.S. and likely limits itself to tacit support.
Risks and Effectiveness: Ambiguity as a Tool
Viewed through the lens of classical deterrence theory, Moscow and Minsk are behaving rationally. Tactical nuclear weapons remain the bluntest available instrument: they make the cost of any invasion unacceptable, and the effect is real. Since 2023, talk of a “strike on Belarus” from Ukrainian formations has noticeably subsided.
The price for such rationality, however, also exists. Minsk incurs further isolation and cements its image as Russia’s nuclear outpost. The sheer frequency of rehearsing deployment scenarios raises the probability of an error—technical or human—in a real-world crisis. The West, in turn, uses each such exercise as a pretext for further militarization of NATO’s eastern flank and, prospectively, for adjusting its own nuclear posture.
The ambiguity embedded in the very design of the exercises is a factor in its own right. The uncertainty over who precisely controls the munitions and under what exact circumstances they might be used serves deterrence—but it also increases the risk of misinterpreting signals when a real crisis erupts.
Long-Term Conclusion: A Return to Cold War Logic
With the joint nuclear exercises of 2026, Moscow and Minsk have continued their systematic reinforcement of a new security architecture for the Union State. Belarus is fully integrated into Russia’s nuclear envelope as a functional element, not merely a storage site. Any prospective adversary’s calculus must now account not only for Russian strategic forces, but also for operationally deployed tactical means on Belarusian soil.
Strategically, May 2026 cemented the return of nuclear weapons to European security policy in their paradoxical role: not as a tool of warfare, but as a tool for preventing a major war. What is clear for now is that in May 2026, the nuclear factor definitively returned to Belarusian soil and to the strategic equations of NATO’s eastern flank.
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