Let us say this war springs up over North Korean aggression going too far. If the USA ended its wars in Iraq and Afghanistan right now, and both sides committed all of their assets to the war, who would win?
Both sides refrain from nuclear weapons until the very end when a decisive victory hasn't been reached.
The war is fought in North Korea and eastern China.
Also to be clear this is a TOTAL WAR, no complaints about civilian casualties and such.