A modern-scale Polish force translated into 1939

How would the 1939 invasion change if Poland had period equipment at the scale and readiness of its modern forces?

The panel expects a much larger, better trained combined-arms army to overwhelm the German invasion force before the Soviet advance, under its chosen interpretation of the counterfactual.

The prompt says Winter War, but the panel interprets it as the German and Soviet invasion of Poland in 1939. The counterfactual gives Poland period equipment at a scale and readiness comparable to its modern forces. Proposed vehicles include the 10TP and TKS-D, with the latter explicitly acknowledged as a design represented by only two prototypes in reality. A much larger force with 37 mm anti-tank weapons and heavy artillery is expected to put early German armoured formations under severe pressure. Training with Britain and France stands in for modern NATO interoperability and combined-arms practice. The panel expects this hypothetical army to inflict catastrophic losses on the German invasion before the Soviet advance, although several details of German tank armour are disputed during the exchange.