Alternative History: Poland vs. Soviets in 1939 [DEFENCE24 HISTORIA]

Before almost the full 20 years of interwar Poland was getting ready to defend itself against the enemy from the east. The Polish Armed Forces were specialized for this task and Polish military thought focused on it. Would the Armed Forces of the Second Polish Republic have coped in a war with the russian Union on the presumption that Germany would stay neutral? Conversation with Wojciech Zalewski.