I think there is another solution. Putin retires along with the responsible heads involved and a vice president or such uses the chance to retreat back to prior invasion. And negotiations start there.
Is a-boomin alright!TB2 needs to have a quote that paraphrases Lt. Aldo Raine...
"'We in the killin' Russians business.
And brother, let me tell you that business is a-boomin...'"
If they can't prevent the markings, Ukrainians should mark every building.