From the Wikipedia article on Russia’s playbook: “Foundations of Geopolitics”
Ukraine (except Western Ukraine) should be annexed by Russia because “Ukraine as a state has no geopolitical meaning, no particular cultural import or universal significance, no geographic uniqueness, no ethnic exclusiveness, its certain territorial ambitions represents an enormous danger for all of Eurasia and, without resolving the Ukrainian problem, it is in general senseless to speak about continental politics”. Ukraine should not be allowed to remain independent, unless it is cordon sanitaire, which would be inadmissible according to Western political standards. As mentioned, Western Ukraine (comprising the regions of Volynia, Galicia, and Transcarpathia), considering its Catholic-majority population, are permitted to form an independent federation of Western Ukraine but should not be under Atlanticist control.
From the Wikipedia article on Russia’s playbook: “Foundations of Geopolitics”
https://en.m.wikipedia.org/wiki/Foundations_of_Geopolitics