The Allies probably would have eventually won World War II even had the Nazis conquered Stalingrad, redistributed their spearhead forces as mobile reserves, repelled the Red Army’s subsequent winter 1942 offensive, and seized the Caucasus oil fields, thus depriving the Red Army of 90% of its motor fuel. But any Allied victory would have required the large-scale use of nuclear weapons, and a death toll in Europe that would most likely have been twice the actual World War II death toll of perhaps 40 million.