I'm not even playing - Been on vacations for 1 week. Waiting for my flight home just as we speak.
Not only that. SU wanted an alliance, in which they wouldn't have to respond if the enemy was Nazi Germany. For Allies that offer was ridiculous. (And they were right) It was impossible for Poland to declare a war aganist SU. That country was just raising from ashes after 100 years of misery and 20 years weren't enough to create a chance to bear attack from two sides.
BTW, Great AAR.