Decided by whom? Did Georgia have a say so in this?
God help us and the former Soviet states now that the Pansy in Chief is in charge of the greatest military in the world.
As of the end of WWII, Stalin had regained all the land Russia lost at the end of WWI, except for Finland and a small area at the eastern end of the Black Sea, just south of Georgia, which Turkey acquired.
Possibly their NATO membership will protect the Baltic countries from re-annexation, and maybe Putin will let go some of the mostly-Muslim republics of central Asia, but he may figure Belarus, Ukraine, Moldova, Georgia, maybe Armenia and Azerbaijan, and perhaps portions of Kazakhstan are fair game for reinclusion in his empire.