Russia only needs to not lose Poland anyway, and Germany's goal is to protect Berlin, so they can withdraw forces as long as battles don't occur.
However, there's a condition - they must only withdraw enough forces to maintain balance between both sides. And both sides must do it simultaneously.
"The Russian Empire Special Forces (13th Army) has appeared in the south!"
"The Eastern Front's 10th Army is withdrawing from the front! Russia appears to be reinforcing all forces for the Slovakia-Hungary offensive!"
That difficult condition was observed on the Eastern Front.
Amiens headquarters.
The Allied headquarters controlling British, American, and French forces is located here, and right above is where American and British forces are landing.
However.
"...What about General Pétain's side?"
