I am surprised at the apparently AWFUL quality of the Russian planning and leadership. They have a large number of examples of why this attack at this time of year was an poor idea. Seems even minimum competency would be to do this as soon as the ground froze for winter, or wait for May. There is a report That Xi asked Putin to put it off past the Olympics. Having everyone spend that month freezing, drinking, and selling their fuel to drink more may have doomed the entire enterprise