Polish Chief of the General Staff Tadeusz Rozwadowski, a soldier who graduated from Austrian military schools, returned from a military mission in Paris, knew that the Russian position was not as bright as it seemed.
Any invasion of Poland from Russia inevitably had to take two axes quite distant from each other. The northern route, along which Tukhachevsky's western front advanced, was separated from the Konarmiya on the S.-0.
front by the huge expanse of the Pripet marshes. Although the terrain was not entirely marshy, there were too few tracks to imagine a major troop movement.
The Polish armies, falling back on either side of the this natural obstacle, improved their communications while the marshy area narrowed, which increased their ability to support each other.
As war drew closer to Warsaw, the time had come for a daring Polish counter-offensive. The deeper the penetration into Poland, the more the Russians would be weakened.