Belarus sent tank and mechanized battalions to training grounds near Poland and Lithuania for four-day drills that Minsk says focus on border security, counter-sabotage operations, and defense against drones and light aircraft, Militarnyi reported on 17 September, citing the Belarusian Defense Ministry.

The exercise includes tank and mechanized infantry battalions, units typically used in conventional ground warfare. Minsk says their tasks include guarding checkpoints and infrastructure and defending against drones. Some drills are taking place near the Suwałki Gap, the only land route connecting Lithuania, Latvia, and Estonia to the rest of NATO. The corridor lies between Belarus and Russia’s Kaliningrad region, which is separated from the rest of Russia. Belarus denies any offensive intent.

What Belarus says it is practicing

Belarus’s Western Operational Command is holding the exercises from 15 to 18 September under Chief of the General Staff Pavel Muraveyko, according to the ministry’s schedule outlined by Militarnyi.

The drills are taking place at the Gozha range near Lithuania and at the Brest and Ruzhany ranges near Poland. RBC-Ukraine wrote that mechanized and tank battalions are taking part and that the Brest and Ruzhany sites lie about 15 and 60 kilometers from the Polish border, respectively. Reservists have also been called up to local territorial-defense units, the ministry said.

Militarnyi cited the ministry as saying that one unit guarded a water intake, another directed traffic with police, and a mechanized brigade manned a checkpoint with border guards. The ministry also said truck-mounted fire teams were posted around the clock to defend against drones and practiced firing at targets imitating surveillance drones.

Muraveyko said the army was not considering offensive action and called allegations of preparations for an attack baseless, according to remarks quoted by Militarnyi. Belarus has not disclosed the total number of troops involved, and the exercise’s scale has not been independently verified.

The Moscow Times reported that the ministry also claimed the exercise remained below the notification thresholds set by the 2011 Vienna Document, an international agreement requiring advance notice of large military exercises.

How Russia could exploit the Suwałki Gap

In December 2025, security analyst Taras Zhovtenko warned that Russian propaganda had laid the groundwork to cite an alleged blockade of Kaliningrad to justify a limited incursion and the establishment of temporary checkpoints.

A German war game later modeled Russia staging border incidents before seizing key routes, although Baltic officials said the scenario severely underrated their armed forces.

Separately, French open-source analyst Clément Molin found that defenses along the Polish and Baltic borders with Russia and Belarus remained patchy and shallow, with Lithuania the most exposed. These assessments describe possible vulnerabilities, not evidence that an attack is planned.

ZVS Holding evacuated its ammunition factory in Snina, a town in eastern Slovakia, on 16 September after a fire broke out on the roof of a production building. Work stopped temporarily in the affected section, but nobody was injured, Militarnyi reported.

The Snina plant has an annual capacity of roughly 100,000 shells and plans to triple it, Noviny reported. The blaze briefly disrupted part of a facility under expansion for Europe’s ammunition buildup, although co-owner CSG expects no impact on customer deliveries. Authorities across Europe are investigating suspected Russian sabotage against defense companies, but no evidence links the Snina fire to that campaign.

ZVS Holding is owned equally by the Slovak state and the Czech defense conglomerate Czechoslovak Group (CSG). It makes 155 mm artillery shells, 120 mm tank rounds, and 30/35 mm cannon ammunition.

In December 2025, ZVS signed a seven-year framework agreement with Slovakia’s Defense Ministry to supply EU states. Purchases under the agreement may be financed through the bloc’s SAFE defense-loan program. Its Euro 58 billion ceiling represents the maximum possible value of future orders, not guaranteed purchases.

Firefighters brought the blaze under control during the afternoon. As thick black smoke rose over Snina, town officials advised nearby residents to limit time outdoors, close windows and doors, and switch off ventilation systems drawing in outside air.

Slovak Defense Minister Robert Kaliňák said the fire had not reached the plant’s production equipment and that the affected part of the building was not being used for manufacturing at the time. That section makes metal projectiles, he said.

Kaliňák said welding during the renovation may have sparked the fire, but stressed that investigators had not established the cause.

CSG said the fire started during roof repairs conducted by an external contractor. The company said the damage and cause still had to be assessed, but it did not expect the incident to affect customer deliveries, STVR reported.

Why sabotage fears shadow Europe’s arms plants

The Snina blaze was at least the fourth fire or explosion at a European ammunition facility since 10 August, after two fires struck a Bulgarian company and an explosion hit an Italian factory. No common cause has been established.

Preliminary findings pointed away from outside interference in the first Bulgarian fire. No evidence of sabotage, however, was reported after the Italian blast, and only the second Bulgarian fire remains under investigation for possible sabotage.

Czech authorities are examining a possible Russian trail behind an arson attack on a factory making drones and thermal optics for Ukraine.

Estonia has also probed suspected arson at a military-robot maker after courts documented earlier attacks directed by Russian military intelligence.