In this morning's radio news I heard one Ukrainian reservist being interviewed (I think it was our National Public Radio, but might have been the BBC broadcast, they are very close together in the morning). The reservist was staying close to home with her bag packed, expecting to get called up, she seemed eager to get in the fight and defend her country. If she is representative, I think Ukraine will do all it can to put up a fight.
Zelenskyy has asked the west for heavy sanctions, weaponry . . . but so far, not troops. I think he intends for his people to do the fighting. I hope the sanctions from the west become biting enough that, together with Russian soldiers in body bags, Putin calls it off. What I expect Putin will actually do is a different thing.
John, your "best option" would not bother me. I hear he's fond of polonium.
Poland, Estonia, Latvia and Lithuania have asked for consultation under NATO Article 4 (used when any member state feels their territory or independence is threatened).
What is most insulting is that Putin is referring to his attack on a free democratic country as "denazification". Maybe my recollection of history is hazy, but didn't Ukrainians also fight against the nazis?