During the Polish campaign, SS units were criticized for their high losses, prompting Himmler to advocate for their autonomy as a separate fighting force.

During the Polish campaign, SS combat units were seconded to various formations of the Heer. Still considered more parade troops than frontline soldiers, they did not prove a decisive factor in the fighting, but the campaign was important for their transformation into real fighting units. They were criticized for their losses, and the officers were blamed, being considered poorly and inadequately trained. The SS officers in turn accused Heer commanders for sacrificing SS troops in suicidal missions. Himmler became convinced that if his units were used autonomously they could have better demonstrated their full potential, leading him to push for the SS to be considered a separate fighting force.

Fully illustrated, this Casemate Illustrated describes the actions of the SS units that fought on the front line in Poland, primarily the Leibstandarte Adolf Hitler, the SS-Verfügungstruppen and the SS-Heimwehr-Danzig.