Mike,
Of the countries you listed, only Estonia and Latvia are NATO nations.
We would be duty bound under our treaty obligations to defend either of them, should Russia attack them.
The other former Soviet republics you mentioned are NOT NATO nations.
We have no obligation to defend them, and likely will not.
Russia likely won’t attack Belarus simply because Belarus is, for all intents and purposes, a Russian client state. Its dictator, Alexander Lukashenko, is an open admirer of Joseph Stalin, and has always been close to Russia.
Regarding those other nations, Russia probably won’t attack them simply because a) many of them, especially those Central Asian “stans,” are major suppliers of cheap expat labor to Russia, and b) in other cases, like Armenia, Russia has good relations with them.
Also, given that Russia has had to deal with Jihadist rebels in some parts of their country, I don’t see them adding Azerbaijan, or any stan, if for no other reason than that it might radicalize a segment of those populations, and create another Chechnya situation.
But for largely Eastern Orthodox Christian nations like Georgia and Ukraine which were historically a part of both the Russian Empire and the Soviet Union………WHOA NELLIE!!!
Remember……what ethnicity was Joseph Stalin?
GEORGIAN!!! Not Russian!!! His real name was Iosip Dzhugashvili.
Russia wants it back!!!