The Soviet Union army was led by General Georgy Zhukov. Adolf Hitlerwas very angry at General Paulus for losing the battle. He stripped Paulus of his rank and held a national day of mourning for the shame Paulus had brought on Germany by losing. German tanks had trouble fighting in the streets of Stalingrad.
Russia won the battle of Stalingrad during World War II
The answer is Steel. This was the beginning of the industrial revolution. With the factory system in place, steel was able to thrive greatly and be produced in much greater quantity. This allowed other developments to rise as steel was a primary resource for development at the time.