Stalin proposed German reunification on the condition that Germany was to be a neutral country after reunification. Of course the US didn't agree with that. Since they wanted to conserve West Germany to use as a battering ram against the Soviet Union.West/East Germany could only peacefully reunify once USSR collapsed. North/South Korea and North/South Vietnam had violent struggles as neither supermaster patrons collapsed. Unless the US collapses, I don't see a peaceful reunification with Taiwan either. In fact, it's very unlikely Taiwan would just give up power without a fight. They are ethnic Chinese after all, they are not quitters.