It is a bit strange indeed, why Kazakhstan and Kyrgyzstan but none of the other "stans"? Why Czechia but not Slovakia? Why Georgia and Armenia but no Azerbaijan?
I would like to point out that this quiz totally sums up how disconnected the entire continent of Africa is from all our first-world political turmoil. Good job, Africa. No, I'm not being sarcastic. Really.
Austria is neutral. Luxembourg is a member of NATO. I don't see any Asian countries getting involved with the exception of Turkey (NATO) and Georgia (opportunism). I assume Serbia and Belarus are on the Russian side. Iceland will be a reluctant participant as the US needs to use it as a naval/air base
Well I see Iceland as a pacive country in this. Used yes, but for the most part indirectly. Luxembourg I also see Luxembourg most likely staying out of the fight except for maybe giving out bank loans or something since they only have a defense force
Question is, who would be the aggressor? Russia, as you say? In my opinion, they would more likely attack Ukraine. Also, I think China is far more aggressive these days than most countries.
Russia would invade Ukraine (as they already have.)
I presume China has it's sights on a Naval invasion of Taiwan.