From: Atlantic Council By Alesia Rudnik

In late March, Ukrainian MP Ihor Guz unfurled the flag of the Belarusian Kalinouski Regiment in the Ukrainian Parliament and paid tribute to the Belarusian volunteers helping to defend Ukraine against Russia’s invasion. This gesture was a reminder that Belarusians currently make up one of the largest contingents of foreign nationals fighting for Ukraine. Their growing presence is helping to shape the battlefield in Ukraine and has broader implications for regional security.
Belarusians have been part of the Ukrainian struggle against Russian aggression since 2014, when dozens joining the volunteer battalions that emerged in response to Russia’s seizure of Crimea and invasion of eastern Ukraine. When Putin launched the full-scale invasion of Ukraine in Febuary 2022, Belarusians responded by forming their own battalion and naming it after Kastus Kalinouski, a nineteenth century Belarusian national hero who led an uprising against imperial Russia.