When Vladimir Putin took to Russian television on September 21 he wanted to send three clear headline messages.
The first is that the threat of nuclear war is credible and serious. The second is that partial mobilisation and rapid changes to military desertion laws is a sign of intent and intractability and a stepping stone to full mobilisation. And the third is that Russian annexation of Donetsk and Luhansk are non-negotiable.
On the question of annexation, Putin suggested that his immediate war goals are now limited to these two regions. This provides an opportunity to contain the conflict and allow Putin the off-ramp that he requires for his domestic public audience and the more important audience of the policy elites for his own survival.