15,000 German soldiers were killed in the September 39 campaign, it wasn’t quite the walkover that people think it was.
Poland was done in after the Soviets invaded from the East.
Any linked reading on how well the Poles defended against the Germans would be appreciated.
In terms of 2 MILLION Axis Soldiers involved in the Invasion of Poland, 15,000 killed IS a “cakewalk”.
Polish forces suffered around 70,000 killed, and outside of Regiment-sized events, never put together a cohesive defense. They never recovered from the “Defend-Forward” positions they held at the beginning of the War.
By the time the Soviets moved in, most of the Polish Army was unavailable above regimental strength. In point of fact, the Germans were well past the demarcation line when the Reds showed. Guderian had to give them Brest-Litovsk. [He had to retake it in 1941.]