Eh? You are a funny dude. Some contingency plans of a general staff which every army of the world has...
On April, 25th, 1920 — Poland without declaration of war has attacked Russia which is bleeding profusely in civil war, and under the Riga contract has appropriated a part of the Ukrainian and Belorussian earths.
In October, 1920 the Polish armies have grasped Vilno and Vilensky area at Lithuania, inconsiderately having broken the Suvalksky contract.
The USSR never started 1st against Poland, so what do you expect?
I agree that Stalin is bad, but it is revolution made the Stalin and if you read the history, you will find were the revolution came from.. and on who's money made...