An American special forces veteran training Ukrainian troops says that Russia’s units fighting in Ukraine are learning from their mistakes, even though their tactics come at a high cost. 

American special forces veteran Erik, who has been working in Ukraine for the past year, has said that Russia’s beleaguered units fighting in Ukraine have learned the lessons of a year at war. Despite suffering losses, they remain motivated and are learning to exploit Ukrainian weaknesses. The Russians are using probing tactics with heavy artillery, repeatedly probing lines to find weak points and then exploiting them. However, they are being more deliberate in their actions and adapting to urban warfare by using thermobaric weapons to rubble buildings instead of allowing Ukrainians to enter and clear rooms. Ukrainian troops are still facing daunting tactical challenges and a tough slog ahead, with the possibility of the conflict continuing for multiple years. 

Source: https://www.newsweek.com/how-russian-forces-ukraine-learning-fight-american-veteran-trainer-1787239