But anyway, what some other states did nearly a hundred years ago has no bearing on today’s. There’s different motivations and actors involved for different reasons.
Russia has no interest in invading anywhere else. Remember Russia spent 8 years trying to negotiate peace with the west who had no interest in peace? (See Hollande and Merkel’s admissions). Even after the invasion Russia was still offering peace and their demand was independence for the breakaways, not annexation. Boris Johnson ordered Ukraine to reject the offer.