It looks like nukes are off the table. In any way, Russia is invading countries who don't possess nuclear weapons, and uses unflagged troops. From that logic it

It looks like nukes are off the table. In any way, Russia is invading countries who don't possess nuclear weapons, and uses unflagged troops. From that logic it would be illogical to retaliate with nukes for attacks on troops that aren't yours... Putin is deliberately isolating conflict regions from each other and from the bigger picture, somehow hoping that no single attack is worth it for NATO to actually retaliate in any form. So far, as long as no NATO countries are in immediate danger, this works extremely well.