The arrogance of Adolf Hitler and the German high command was heightened by the enemy’s stupendous losses in Operation Barbarossa. The great offensive of 1941 might not have destroyed the Soviet Union, but more than 3 million Russians were dead. Three million more were in German prison camps. Add to those grim statistics the tens of thousands murdered, or dead from deliberate starvation and mistreatment at the hands of the Wehrmacht and the SS. German flags flew over the Ukraine, Russia’s granary, and over the Donbas, industrial heartland of the Soviet Union. A third of the country’s rail network was in German hands; its heavy industrial production was down by three-fourths. The Red Army had become a blunted instrument, its tanks and aircraft destroyed, its best divisions chewed up and spat out by the blitzkrieg, its winter 1941 counterattack met, then checked, by a German army at the very nadir of its own resources and fortunes.