Belarus Masses Troops Near the Polish and Lithuanian Borders for a Four-Day Exercise

Belarus began command and staff exercises with its Western Operational Command on 15 September, concentrating forces near the borders with Poland and Lithuania. The Belarusian defence ministry describes the drills as "purely defensive" and says there is no cause for concern, according to Euronews. The exercises run to 18 September under the direction of Chief of the General Staff Pavel Muraveiko.

Ukrainian military reporting describes the content of the training as securing the border, enforcing martial law, countering saboteurs and irregular armed groups, and defending against light aircraft and drones, with tank battalions deployed and mobilization procedures rehearsed in the Grodno region adjoining Lithuania. Those tasks describe territorial defense rather than offensive operations, which is consistent with what Minsk says, though the location is what neighboring governments object to.

Warsaw and Vilnius have responded with physical measures. Poland moved to close its border with Belarus and Lithuania increased security along its frontier for the duration of the exercises, repeating a pattern established during previous drills. Border closures of this kind interrupt road freight between the European Union and Belarus, Russia and onward to Central Asia.

This year does not include Zapad, the large quadrennial Russian-Belarusian strategic exercise, which last took place in 2025 and has not been announced for this autumn, so the current activity is a national Belarusian exercise rather than a joint one with Russia. What matters is the pattern now established on the European Union's eastern border: an exercise on one side, border closures and troop reinforcement on the other, and a steady increase in the baseline cost of moving goods and insuring activity in the region.