Tactical nuclear weapons:
https://www.subsim.com/radioroom/sho...nu#post2832008
https://www.subsim.com/radioroom/sho...nu#post2844539
https://www.subsim.com/radioroom/sho...postcount=7164
https://www.subsim.com/radioroom/sho...ht=tactical+nu
To me it makes less and elsser sense to expect a nuclear escalation by Putin. If he would have done so, then at the beginning of the conflict when it became obvious his army was failing to live up to the expectations. Since then he has tried a lot to improve it - by conventional means.
A singluar use of a tactical nuke meakes no sense, militarily, and I doubt Russia will dare to send several dozens in the first blow. And the use of just one or a few tactical nuclear weapons is something that the Ukraine and the army as a whole would survive. The political fallout would outcost the military mini-gains by many, many factors.