So we'll still have a northern communist Korea?
Nah. After all, the Soviets have less contribution to the war effort, only intervening in mid-1944, and so the Allies do not accept a communist North Korea, and even if they did want to take over North Korea, the Allies are capable of getting there faster. Bukharin, Rykov, and Tomsky are less adamant than Stalin in taking over foreign territory, so they agree that the Allies get Korea. Korea won't be divided.
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P.S. Apologies for overpromising on making an update about the guerrillas. I couldn't imagine where I can take that story to, and I'll just include stories on how all countries treat their veterans when I describe the post-war world.