Tsarist ww2 Russia falling after nukes drop on Vladivostok, Bolsheviks rapidly seizing power and inheriting the imperial war machine.
What's that, the Korean War still needs to happen? Fuck it, Mikuland becomes a guarantor of South Korea, and the US backs Mikuland because it's a crucial ally against communism. And this makes the South Koreans love Mikuland and blah blah blah now Mikuland created K-pop.
The alt-history for that episode was as low effort a shoulder shrug as "Somehow, Palpatine is back."