One of the points that Russian President Vladimir Putin was supposedly concerned about was the spread of NATO to nations that border Russia. Besides his desire to re-acquire the Soviet empire, he says that he feels that NATO is a threat to Russian independence. You may parse those sentiments anyway you want.
But what may transpire is a number of nations that share 800 miles of border with Russia being pushed into NATO. That would be Finland and Sweden who have remained free of that alliance but with the recent Russian invasion of Ukraine, have renewed their conversations about whether to join the alliance or not. So Putin may actually cause one of his fears to occur on his border by supposedly preventing it by his ruthless invasion of Ukraine.
I have this from an American ex-pat and retired journalist currently living in Finland.
And Finland of course has more than a little first hand reason to be concerned…