The Soviet experience of warfare was very different from that of its Allies, Britain and the United States. Large in territory and population, the Soviet Union was poorer than the other two by a wide margin in productivity and income. It was Soviet territory that Hitler wanted for his empire, and the Soviet Union was the only one of the three to be invaded. Despite this, the Soviet Union mobilized its resources and contributed combat forces and equipment to Allied fighting power far beyond its relative economic strength.
These same factors meant that the Soviet Union suffered far heavier costs and losses than its Allies. After victory, Hitler planned to resettle Ukraine and European Russia with Germans and to divert their food supplies to feeding the German army. He planned to deprive the urban population of food and drive much of the rural population off the land. Jews and communist officials would be killed and the rest starved into forced migration to the east.