What if, after the fall of the Soviet union, outside forces took control of Soviet/Russian territory. Examples include Germany with Kaliningrad (and maybe parts of Poland?), Finland retaking territory lost during the Winter War and perhaps Karelia, Japan with the Kuril islands and Sakhalin, China retaking old Qing territory, and Romania retaking Moldova+Odessa. Could a similar thing happen with Yugoslavia, with Italy seizing Istria and maybe Dalmatia, Bulgaria/Greece taking Macedonia, Albania taking Kosovo, the list of irredentist claims goes on! Which of these would be most likely to happen, and would any of the new nations try to stop them? Also, feel free to name any possible border changes i did not mention.