More than three years after Russian forces launched their full-scale invasion of Ukraine from Belarusian territory, Kyiv and Western capitals are sounding new alarms that Alexander Lukashenko, Belarus’ long-ruling authoritarian leader, could open a new front for the Kremlin by allowing Moscow to again use his country as a launchpad for aggression.
When Putin launched his full-scale invasion on February 24, 2022, tens of thousands of Russian troops massed in northern Belarus under the pretense of joint military drills, then launched a rapid push south toward Kyiv, just 90 kilometers from the Belarusian border. Putin’s bid for a quick capture of the Ukrainian capital crumbled in the face of fierce Ukrainian resistance, with stretched-out Russian armored convoys sitting vulnerable to ambushes along narrow highways. Just over a month into the invasion, heavily damaged Russian forces with crumbling supply lines retreated from northern Ukraine, a move the Kremlin framed as a “goodwill gesture” amid early peace efforts. Those early peace talks were actually hosted on Belarusian territory, bringing Russian and Ukrainian delegates together for the first negotiation before talks shifted to Istanbul, where no breakthrough agreement was ever reached.
Unlike the opening days of the war, Belarus has not deployed its own troops to fight in Ukraine, but Lukashenko’s regime has become an integral, often overlooked pillar of Putin’s war effort. Over nearly three years of conflict, Minsk has opened its borders to host Russian military infrastructure, tactical nuclear weapons, and training grounds for Russian troops, offered its hospitals to treat wounded Russian soldiers, and integrated its domestic manufacturing sector into Russia’s war supply chain.
Ukrainian sanctions envoy Vladyslav Vlasiuk confirmed that fragments of a Russian Oreshnik ballistic missile fired at Ukraine in May contained microchips manufactured in Belarus. The Belarusian opposition military monitoring group BELPOL, made up of former military and law enforcement officers who oppose Lukashenko, estimates more than 500 Belarusian industrial plants are currently involved in producing weapons components, repairing Russian military equipment, and providing logistics support for Moscow’s campaign. The group’s head, Uladzimir Zhyhar, told reporters that “Lukashenko’s regime is quite seriously involved in the war. Lukashenko is helping Russia in every way he can.”
Zhyhar added that new infrastructure construction, including a large-scale firing range and barracks capable of housing thousands of troops, is already underway in Belarus’ Gomel region along the Ukrainian border. This ongoing military buildup has forced Kyiv to divert tens of thousands of troops from the main 1,000-kilometer front line in eastern and southern Ukraine to defend its northern border, stretching Ukrainian defensive resources thin.
Beyond conventional military support, Belarus has become a core part of Russia’s nuclear deterrence posture in Europe. Geographically, Belarus shares borders with three NATO member states — Latvia, Lithuania, and Poland — making it a strategically critical outpost for the Kremlin. In 2024, Moscow updated its nuclear doctrine to place Belarus firmly under Russia’s nuclear umbrella, and announced that it had deployed its new nuclear-capable Oreshnik intermediate-range missile system to Belarusian territory. Russia has already used conventionally armed variants of the Oreshnik to strike targets inside Ukraine three times in the last six months. Earlier this month, Moscow and Minsk held large-scale joint nuclear force drills that simulated delivering nuclear warheads to missile units and preparing for a launch, with a joint Belarusian-Russian crew test-firing a nuclear-capable Iskander missile from a southern Russian range.
“Belarus lacks military sovereignty, and as soon as Moscow sees it as necessary for its strategy, Moscow will naturally use Belarus as a launchpad for a new invasion of Ukraine or some kind of armed conflict with NATO countries,” Zhyhar explained, noting that Belarus offers a “very convenient springboard” for any new northern push toward Kyiv.
Last week, Ukrainian President Volodymyr Zelenskyy confirmed that Kyiv’s intelligence services had detected a sharp increase in Russian efforts to push Belarus into deeper direct involvement in the war, and prepare for new offensive operations launched from Belarusian territory. Zelenskyy said potential targets include the Chernihiv-Kyiv corridor in northern Ukraine, or even a strike against a NATO member state sharing a border with Belarus. In response, Zelenskyy has ordered Ukrainian military and security agencies to strengthen northern border fortifications and prepare a coordinated defensive response.
Both Lukashenko and senior Russian officials have rejected Kyiv’s warnings. Lukashenko has insisted Belarus has no plans to enter the war unless it is directly attacked, while Russian Security Council Secretary Sergei Shoigu dismissed Zelenskyy’s claims as a fearmongering tactic designed to pressure Western allies into sending more military aid to Kyiv.
Even so, the growing risk has prompted unprecedented diplomatic outreach from Western powers. On May 24, French President Emmanuel Macron held his first call with Lukashenko since the 2022 invasion to warn of the severe risks if Belarus is dragged deeper into the conflict. Lukashenko responded by announcing he would host a French envoy the following week to discuss European security and potential easing of European Union sanctions on Minsk.
Ukrainian border guard spokesperson Andrii Demchenko noted that while intelligence confirms Russia is increasing pressure on Lukashenko to enter the war directly, Ukrainian forces have not yet detected a large-scale buildup of Russian or Belarusian troops and equipment along the border. Belarusian opposition leader-in-exile Sviatlana Tsikhanouskaya, who visited Kyiv last week, emphasized that “Belarus must never again become a springboard for aggression. Russian tanks must never again march through Belarus to Chernihiv, Zhitomir, Rivne, or Kyiv. Ukraine is fighting for itself and for all the peoples who have lived in the shadow of empire for too long. It is fighting for the right to live in peace. And the fate of my country, Belarus, also depends on Ukraine’s success.”
Independent military analysts based in Minsk argue that a large-scale offensive launched from Belarus is militarily unlikely at this stage. Belarus has just under 49,000 active-duty troops, a fraction of Russia’s 1.5 million active force, and while Minsk could theoretically mobilize up to 290,000 reservists, those forces lack modern weapons and sufficient training to conduct offensive operations. Minsk-based military analyst Alexander Alesin estimates an offensive would require mobilizing as many as 500,000 personnel — a move that would cripple Belarus’ domestic economy and require massive Russian arms supplies to equip the force.
“Even with a small force, the Ukrainians can easily defend themselves and inflict heavy losses on the Belarusian army,” Alesin said, noting that Ukraine has already built layered heavy fortifications along the entire border and planted extensive minefields that would slow any incursion. Alesin added that Lukashenko has little incentive to pursue direct involvement, pointing out that the Belarusian leader benefits greatly from his current role as a quiet supplier to Russia’s war machine. “The last thing Lukashenko wants is to fight, and he’ll cling to his current position at any cost, so he can avoid fighting while profiting handsomely from the war,” Alesin said.