You're assuming that Putin wants to expand into Poland.........which is ridiculous.........but that's the fear narrative being spewed by DC......by which they 'justify' the proxy war with Russia.
Putin made it very clear what his objectives were.
1. To De-Nazify ukraine....which has been shelling it's own Russian citizens in the Donbas for the last 14 years. 2. To stop nato expansion into ukraine.
That's all he wants....and it seems reasonable to me.......I mean, if Russia installed missiles in Mexico it would be the same......we wouldn't stand for it.