Stalin's Blitz 9: Red 1939

Comrade, your orders are to help the third army group is assaulting Lodz. With you forces, it will be a piece of cake. With our.....

... Comrade, we have just received an information that multiple units have appeared from nowhere to the west of our positions. Their equipment is of no precedence - we've never seen such advanced machines and uniforms before. Anyways, they mostly have polish distinctions, but there are some americans as well...

PS. This scenario is a fantasy scenario, based on www.1939.com.pl book and Open General Campaign.
Modern Polish units travel in time to 1939. But this time they meet the Soviets and your task is to destroy them! 