There is a good chance the nuke threats and mobilization orders by putin are for 1 attempting to dilute western aid supply to ukraine AND try to bolster what was once a much stronger bargaining position to keep captured Ukrainian lands. Without much thought this was probably sometime back when they were closest to Kiev. At this stage should he had agreed to back off Kyiv he probably could have kept the gains in the east and south but now he recognizes that most of his 2014 gains are at serious risk and cost to keep.
New thought given the comments of defense commissioner stating martial law there is a good possibility a portion of the 300k called up will bolster the riot police and or putins protection from internal threats.
“You can resolve to live your life with integrity. Let your credo be this: Let the lie come into the world, let it even triumph. But not through me.”
- Alexander Solzhenitsyn