My impression is that Putin wants all of the Ukraine. I do not think this massive military effort is all just to get hold of two eastern provinces. My suggestion is for people to do teshuva.[repent of their sins]. But since repenting of sins can be a little tricky because of the problem of identifying what is a sin I suggest that people learn Musar. Musar is a set of books on Ethics written during the Middle ages and Renaissance.
Also i should mention that we find that Rebbi Nachman thought fear of God is connected with length of days. People will do a lot to lengthen their days. learning Musar seems a lot less effort a that what people usually spend on this kind of effort.
Also I recommend opening up yeshivas of Musar. that means yeshiva that learn Gemara rashi Tosphot and also Musar. And especially for people that have sinned i think this is important. Because we find that one who has sinned and caused others to sin can’t repent. The only solution to this problem is to bring many people to be better.
You see many people that want to repent get involved in fanatic religious cults. This is because of the fact that one who has sinned and caused other to sin they prevent from heaven from repentance. That is they deflect and divert them into some insane path like Chabad that pretends to be Torah but is in fact anti Torah