Wait, I’m confused, how many warheads get used in this TL, because unless it’s in the thousands there’s absolutely no way a nuclear winter would occur. The entire theory behind nuclear winter is very shaky to say the least, and considering how few warheads are on standby between Russia, China, Britain, France and America, I really doubt that it’d be very bad. I doubt even the casualties would get over WW2 levels if both sides only used the warheads that they have on standby.