As the routed North Korean People's Army (NKPA) withdrew into the mountainous reaches of their country and the People's Republic of China (PRC) funneled in its massive infantry formations in preparation for a momentous counter-offensive in the last months of 1950, both lacked adequate air power to challenge US and UN air supremacy over both the battlefields and the logistics channels from China into North Korea. Reluctantly, Josef Stalin agreed to provide the requisite air cover, introducing the superior swept-wing MiG-15 to counter the American's straight-wing F-80 jets and to repel the...