For example, countries in the Balkans claimed their independence after the political upheavals of the 1990s and Kazakhstan reclaimed its land from the Soviet Union as well. Are there no ethnic groups in eastern Russia that have some sort of claim to Russian land in that area?
Similar question: Was there any sort of 'Manifest Destiny' in exploring / claiming land eastward?
There was a good answer recently by u/poob1x that might answer your question, take a look: https://www.reddit.com/r/AskHistorians/comments/9ee5s4/was_the_russian_far_east_colonized_in_a_similar/?utm_source=reddit-android