In December, Pepelyayev's forces resumed their high tempo advance, this time to the west. His greatest victory was the Capture of Perm, where about 20,000 Red Army soldiers were taken prisoner on 24 December 1918. Further advance on Vyatka was impeded by heavy frost. As the spring rasputitsa arrived Pepelyayev's position deteriorated. His armies had outrun their supply lines and were exhausted from many months of incessant warfare, while the Red Army was pouring newly raised troops into the area.