What if they won't claim the territory. They'll just destroy infrastructure and all the military of the Western and rump Ukraine and that will jump start the influx of refugees to Europe, which likes Ukrs, does it not? It will have to accommodate them and help those who stayed to somehow survive. Out of love for the needy, which seem to be the main reason it's been supporting Ukraine's fight for freedom. Russia all the while will be slowly acquiring regions that are crucial to it and that are mostly Russian in its essence: Odessa, Nikolaev, Kharkov, Transnistria etc, rooting out Nazies and their idiology. They'll hopefully remain more or less intact and won't need much of rebuilding. There'll be no guerrilla war, it's not 1941 after all and Russians are not Germans. Buchas are Banderites' doing, people will come to eventually. ;-)