Ukraine

Doesn't matter 25 thousand odd troops rock to the border. You either die or let them through. How Prigozhin survived this is incredible to me either he is going to fall out of a high window or or accidentally come into contact with radioactive Polonium or Novichok. Or it was a false flag to get the Ukranians to commit their reserves or to expose traitors in the Russian military.
I'm going with false flag/staged. Not much else makes any sense.