AFAIK the maps were restricted.
As I read the german accounts of the invasion, they ran down the road , found a city and just took it as it came.
Niet, see my points above.
No, but - again - AFAIK - the official maps were official rather than true representation.
Yes, Angle - like Communism - is a German invention, only the German Democratic Republic had an angle in the official insignia 
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Best regards
Peter Kamp Nielsen
Chakoten
Danish Military Historical Society