I doubt that there was anything most WWII countries could do to make the Nazis march back, but if it were possible, while retaining their sovereignty, I Think it would have been wise to do so.

I agree WWII is a poor analogy for the Ukrainian war, which is quite different, but I did not pose the question.

>I don't believe there's anything realistic that can be done right now to make Russia march back to where they came from, other than showing them we won't accept such aggression in modern day Europe.

This is where we fundamentally differ. As in the other thread, I think that Russia would pack up their bags and go home if Ukraine agrees to stay neutral with respect to NATO, and perhaps cede Crimea and Donbas to Russia. I gather that you think this is not the case.

>One of their demands at the start was that Poland and other Baltic countries that joined NATO most recently should leave it, they would call the invasion then

Not that they should leave NATO, but that the US would reduce their troops there, in exchange for Russia drawing down troops from its boarder. This was proposed as a path to lowering tensions and avoid war in Ukraine.

https://www.reuters.com/world/russia-unveils-security-guaran...