Except that Russian officials up and down the flagpole - including the head honcho just this week - have very clearly and publicly said they'd rather that Poland, Romania and Hungary split up the Western half, and deal with the rebellious Galicians than them.
They don't want the headache and would be rather content to stop their efforts at Kharkhiv-Odessa line (if that's even possible to achieve for them, of course).
They don't want the headache and would be rather content to stop their efforts at Kharkhiv-Odessa line (if that's even possible to achieve for them, of course).