EDIT: For example, in the Russian Far East, were there similar alternating attempts to Russify indigenous peoples, kill them, and/or crowd them into reservations? If so, did Russian policy toward such peoples tend to be analogous to American policy toward indigenous peoples at the same point in time?
I don't want to suggest that there's no more room for answers, but this old thread about "Russian Manifest Destiny" has a very nice answer from u/Cetashwayo that you might want to check out.