Russia would lose up to 1.8 million troops and take 5 years to capture the 4 Ukrainian regions it wants: UK Army Chief
Gen. Sir Roly Walker said Russia's minimum goal of taking four oblasts would, based on current attrition rates, cost it more than 1.5 million troops.
https://www.businessinsider.com/ukraine-war-four-regions-russia-lose-1-million-troops-walker-2024-7