Not sure what you’re talking about. the Defense line that Ukraine broke through is identified as the Surovikin line. I would say that it looks like they’ve only penetrated the first TWO of what looks like THREE defensive lines, but this is DEFINITELY NOT the No Man’s Land. In fact, once they punch through the THIRD line, it’s pretty much wide open until Melitopol. I mean, I presume the Russians will expend mobile forces in places like Orkhiv, but these three lines ARE the big three defensive lines, and now two of three are gone.
Check with Colonel McGregor, though. He’ll be able to reassure you that the neo-Soviets will never get past Robotyne.