MOSCOW, July 10 — Against this backdrop of a grinding war in Ukraine and a steady drumbeat of atomic rhetoric from the Kremlin, the question of when Russia might cross the nuclear threshold has become the defining strategic puzzle of the age. The doctrine itself, last updated in June 2020, is deceptively simple on paper: Moscow reserves the right to use nuclear weapons in response to a threat to the state’s existence.
But the interpretation of that threshold, and the menacing signals that have emanated from the Kremlin since February 2022, have kept Western capitals in a state of constant vigilance. The chronology of nuclear signalling is stark.
On September 21, 2022, President Vladimir Putin addressed the nation, announcing a partial military mobilization and warning that Russia would use “all means” to defend its territory. Then, on March 25, 2023, Putin announced plans to station tactical nuclear weapons in Belarus, a move that fundamentally altered the European security landscape by placing shorter-range atomic arms on the doorstep of NATO’s eastern flank.
What is at stake in this doctrinal dance is the unwritten rule of nuclear deterrence that has held since 1945: that such weapons are a last resort, not a tool of coercion. The repeated threats from senior Russian officials, including former President Dmitry Medvedev, have tested that norm.
Medvedev, in particular, has become a regular mouthpiece for atomic brinkmanship, issuing statements that Western analysts view as an attempt to sow fear and fracture the Western alliance. Yet for all the rhetoric, a crucial fact remains: as of October 2024, Russia had not used nuclear weapons in Ukraine. The wider picture suggests that the Kremlin has so far judged the costs of crossing the nuclear threshold to outweigh the military benefits.
But the doctrine itself is a living document, and the conditions that would trigger its application remain opaque. The 2020 text speaks of a threat to the state’s existence, but what constitutes such a threat in the Kremlin’s eyes is a question that keeps NATO planners awake at night. The stationing of tactical nuclear weapons in Belarus adds a new layer of complexity.
These are not the city-busting strategic warheads that defined the Cold War; they are smaller, battlefield weapons designed for use on the front lines. Their deployment brings the risk of escalation closer to NATO’s borders, and raises the spectre of a miscalculation in a crisis.
For European capitals, particularly those in the east, this is not an abstract debate — it is a concrete shift in the military balance. As the war in Ukraine continues, the nuclear dimension remains the most dangerous variable. The doctrine, the threats, and the deployments form a pattern that the West has studied with growing alarm.
What to watch next is whether the Kremlin, facing setbacks on the battlefield or a perceived existential challenge to its regime, will decide that the moment has come to move from threat to action. For now, the world watches, and waits.
