Bonus if you understand the PoD reference from a alt history movie.
PoD being in the 1920s, the Reichswehrs investigation of mechanization and the theories of the tank as a "strategic weapon" is stillborn and the trend continues into the nazi/Wehrmacht era. The doctrine chosen is more mainstream, that tanks are a support weapon, a sort of assault weapon supporting infantry and cavalry like artillery, pioneers, ect...
First: how does this affect the choices in general Wehrmacht & ground forces doctrine, and the organization & weapons selection?
Second: what is the effect externally in other nations military theory?
In the latter case I am wondering if the development of other nations tank or armored divisions would be far less 1937-1941 absent the German example. In the USSR there was a trend from 1937 to question the doctrine of massed mobile armored or mechanized forces. That changed after the polish defeat & there was a reformation of tank dominated 'armored' corps in the Red Army. Less clea to me was the mechanization of the French cavalry. I'm not sure how much of that & the formation of the DLM was inspired by internal French cavalry theory and external German example.