Why Ukraine is confronting Belarus, and what it means for Minsk-Moscow ties

Ukrainian President Volodymyr Zelensky issued an ultimatum to Belarus to dismantle Russian drone relay infrastructure or face Ukrainian military action, escalating tensions significantly. Eastern Europe researcher Balazs Jarabik of Carnegie Politika argues this shift reflects not just security concerns but Ukraine's emerging ambition to become a regional security actor. The standoff is further complicated by nascent US-Belarus and France-Belarus diplomatic contacts that Kyiv views with deep suspicion.

Since early spring 2026, Volodymyr Zelensky has been warning that Moscow could attempt to drag Belarus into the war. By summer, his rhetoric hardened into an explicit ultimatum: Belarusian authorities had one week to dismantle relay stations used to guide Russian drone strikes against Ukraine, or the Ukrainian Armed Forces would destroy them. Zelensky noted he had taken "non-public de-escalation steps" before going public and had previously warned Minsk to "stop helping the Russians."

Kyiv's core security grievances

Ukraine's primary concern is that Belarus continues to function as a critical component of Russia's military infrastructure. Kyiv accuses Minsk of allowing Russian drone operators to use facilities near the Ukrainian border. These fears intensified after Russia deployed tactical nuclear weapons (TNW) to Belarus, tying the country even more tightly to Moscow's military posture. Large-scale nuclear exercises on Belarusian territory in May 2026, involving elements of Russia's strategic forces and TNW, alarmed Kyiv further, arriving as a pointed signal to both Ukraine and NATO following unprecedented Polish-French manoeuvres. No definitive evidence emerged that Russian nuclear warheads are now permanently based in Belarus, as Moscow deployed additional TNW specifically for the drills, but Minsk's strict secrecy on the matter stands in notable contrast to Moscow's more demonstrative behaviour.

Meanwhile, escalation risks beyond the Ukrainian theatre are growing more broadly: increasing numbers of drones are crossing into neighbouring countries' airspace, including Belarus and NATO member states. Minsk claims Kyiv is deliberately directing these drones toward Belarusian territory.

The US-Belarus factor

Analyst Balazs Jarabik argues, writing for Carnegie Politika, that Ukraine's sharp policy shift is less a response to any immediate Belarusian threat and more the product of several interlocking factors. Chief among them is Kyiv's anxiety about an emerging US-Belarus dialogue. Under Donald Trump, Washington began seeking new communication channels with Minsk to secure the release of political prisoners, gather intelligence, and limit Russian influence in Belarus. A personal meeting between Trump and Alexander Lukashenko has not been ruled out, potentially accompanied by the release of more than 600 political prisoners still held in Belarus, though the process remains fragile given Minsk's dependence on Moscow and existing sanctions.

Previously, when Andriy Yermak headed Zelensky's office, Ukraine avoided steps that might push Belarus further into Russia's military embrace, even covertly cooperating with Minsk on security matters. The pivot came in December 2025, when Zelensky met opposition leader Sviatlana Tsikhanouskaya in Vilnius for the first time, after which Kyiv imposed two rounds of sanctions against Belarus and raised the prospect of prosecuting Lukashenko.

France, the EU, and Belarus's mediator ambitions

European diplomatic movement is also a source of concern for Kyiv. On 24 May 2026, Emmanuel Macron spoke by phone with Lukashenko at French initiative, preceded by numerous formal and informal Paris-Minsk contacts, with the two leaders discussing regional security, EU-Belarus relations and bilateral issues. The call took place ahead of an informal EU foreign ministers' meeting focused on prospects for Brussels-Moscow dialogue.

These developments reflect growing EU concern about escalation risks on NATO's eastern flank. Belarus is positioning itself as a useful intermediary, a role it played after 2014. Lithuania, however, has consistently opposed any EU rapprochement with the Lukashenko regime, making a significant policy shift difficult without a broader settlement around Ukraine. A potential recalibration of Poland's stance, if Belarus releases political prisoners and reduces migration pressure, could accelerate internal EU debate.

Ukraine as a regional security actor

Jarabik argues that the evolution of Ukrainian policy toward Belarus also mirrors a profound shift in how Kyiv sees itself: no longer merely a country seeking Western protection, but an emerging regional security actor in its own right. Ukrainian public opinion supports this self-image. Surveys show that 40% of Ukrainians now regard their country as one of Europe's leading states, up from just 8% before the war. Nearly three-quarters believe the Ukrainian Armed Forces are defending not only Ukraine but all of Europe.

These sentiments reinforce Kyiv's desire to shape the architecture of future regional security arrangements, despite structural constraints including continued dependence on Western financial and military support, growing war fatigue, demographic decline, and uncertainty about the pace of EU integration.

For Ukraine, Belarus poses a larger strategic question: will the future European order rest on long-term deterrence of Russia, or on a managed coexistence with it? As Jarabik concludes, Belarus is becoming the first testing ground for these competing visions, and Kyiv is determined to influence the answer.