Moscow has issued a fresh nuclear warning to NATO over any attempt to isolate its heavily armed Baltic exclave of Kaliningrad.
The Russian Foreign Ministry delivered the threat in a diplomatic document on Wednesday, stating that Russia would use “the entire arsenal of forces and capabilities at its disposal, including nuclear weapons” if alliance members tried to cut off Kaliningrad from the mainland. The same document also floated strikes against “decision-making centers” in NATO member states from the very start of any conflict.
NATO fired back in a written response, insisting the alliance is purely defensive and that none of its exercises or activities threaten Russian territory. The alliance separately urged Moscow to drop what it called “irresponsible nuclear rhetoric.”
Carrie Filipetti, executive director of the Vandenberg Coalition and a former deputy assistant secretary at the State Department, said that Putin leans on nuclear threats because they have worked for him before. “Russia has threatened to use nuclear weapons in the past, including veiled references to tactical nuclear attacks at the beginning of Putin’s invasion of Ukraine, lowering their formal threshold for launching a nuclear attack in 2024, placing Russia’s nuclear forces on high alert, and restarting nuclear testing,” she said.
“It is very common for Putin to use these threats, because he sees it as a way to deter Europe and the United States from continuing to support Ukraine.”
She tied the Kaliningrad warning to a cluster of recent flashpoints: NATO jets scrambling over Russian aircraft, US and NATO air drills near the exclave last month, and the grinding pressure of the Ukraine war. “The threat about a nuclear attack if Kaliningrad is threatened or isolated comes on the heels of a few developments,” she added.
Filipetti argued the timing reveals a Kremlin feeling cornered. “Putin seems to understand that the tide is turning against him, and he’s resorting to aggressive rhetoric to try to stop European support for Ukraine as he has tried to do in the past,” she said.
Dr. Azeem Ibrahim, a research professor at the Strategic Studies Institute at the US Army War College, warned NATO to look past the nuclear headline and focus on what Kaliningrad is already doing. He described the territory as “essentially a front-line operation of the Russians in terms of signals intelligence, signals interference and essentially mechanisms by which to carry out this hybrid warfare.”
“It’s essentially become a Russian fortress,” he said.
Ibrahim said Russia has shifted toward disrupting the civilian systems that keep societies running rather than matching NATO tank for tank. “Russia is actually adopting a very different approach,” he said, targeting “infrastructure” and “societies in general — what keeps societies functioning.”
The ambiguity of such attacks, he noted, creates a dilemma for an alliance built around collective defense against armed assault. “Many times, you cannot trace exactly where a lot of this interference is actually coming from — attacks on power stations or internet and telecommunications, et cetera,” he said. “There’s always some sort of plausible deniability if it’s done by an actor who’s very capable.”
He pushed NATO to treat serious hybrid attacks as potential Article 5 triggers and to start “going on the offensive in terms of hybrid warfare and understanding the threat and pushing back and sending a very clear signal to Moscow that such threats will not stand.”
Lithuania, which shares a direct border with Kaliningrad, dismissed Moscow’s document as a divide-and-conquer tactic. “Russia’s insinuations and threats have no basis. NATO is a defensive alliance and poses no threat to Russia or any other country,” the Foreign Ministry said. “Russia’s threatening is intended to fracture transatlantic unity and impede our support to Ukraine. Russia will not achieve its goals.”
The ministry added: “We strongly condemn any threats to use force and irresponsible nuclear rhetoric. Russia must stop its aggression against Ukraine… Lithuania is strengthening its national defense system and capabilities, including air defense. We train with our allies and work alongside NATO forces deployed in Lithuania. We are prepared to defend every inch of NATO territory and respond to any threats.”
Kaliningrad sits on the Baltic Sea wedged between NATO members Poland and Lithuania, geographically severed from the Russian mainland since the Soviet collapse. The exclave hosts significant Russian military assets including elements of Moscow’s Baltic Fleet, and has long served as a forward operating position for Russian forces facing west.
Retired Air Force Lt. Gen. Richard Newton said that Western officials, himself included, doubted Putin would actually invade Ukraine in early 2022 despite mounting warnings. “And then on that Feb. 24, Putin launched the largest land invasion against Ukraine since World War II,” he said. “NATO should take Russia’s warning seriously that it could resort to employing nuclear weapons against the alliance should Kaliningrad be cut off from Russia. We are in the midst of Russia employing ‘gray zone’ coercive actions against NATO nations, so this pronouncement should not surprise the West.”
Filipetti cautioned that even empty nuclear threats carry their own dangers. “NATO is a defensive organization that is in no way threatening Russia’s position on Kaliningrad,” she said. “That said, any time there is a public threat of nuclear attack it must be taken seriously, especially with someone like Putin.”
“Nuclear bombs are a potentially world-altering technology,” she added. “It is not only their use, but the threat of their use, that could cause significant miscalculations and escalations.”
Russia denies conducting hybrid warfare against European states and insists it has no intention of attacking NATO countries. Moscow instead blames NATO military activity near Kaliningrad for driving confrontation. Kremlin spokesman Dmitry Peskov characterized the latest warnings as diplomatic reminders to “hotheads in Europe,” reports said Wednesday.