The German invasion in 1941 led to a series of staggering defeats for the Russians. In the first five months of fighting, the Soviets lost about four million men, amounting to 80 per cent of the total strength of the ground forces at the time of the outbreak of the war. Yet the Red Army managed to hold on. The Soviets had been steadily growing throughout in capability and effectiveness, and after the smashing of the German offensive at the battle...