Russian Offensive in the Donbas

If the russian offensive in the donbas falters and stalls, do you think that we're going to see a a retreat like we had seen in the battle of kiev? Or do you think it's going to be more of holding some of the territory that they've taken. There might even be an operational pause for some time for the crane military to build up before conducting an offence. I suppose their first plan will be to try to hold on to what they have taken but all depends on whether or not they're given the forces to actually do that.