Poland (Pol Army Group, 160,000 men under Pilsudski) attacked USSR (Sov Army Group, 200,000 men under Tukhachevski) in Poland. The CAA Database of Battles records 264 hours of fighting on a front of 335 km, a single envelopment, left flank, frontal attack against hasty defense, and that Poland won. Losses: Poland 50,000 (31%), USSR 150,000 (75%).
This plan is generated from those figures. It shows the shape of the battle the database describes: the size and width of the armies, the plan of attack and the outcome. It does not show where the units actually stood.