A gigantic operation is underway to wipe the BETA off of Europe and slow their advance.  The Schwarzesmarken have been chosen to represent East Germany, as they are among the last East German TSF units that are still functional.
That's an artillery recon unit...
...وحدة المسح الجويّ المدفعيّة
Das waren Artilleriebeobachter.
Es la unidad de reconocimiento de artillería.
Es la unidad de reconocimiento de artillería.
C’était la troupe d’observation…
È un'unità di ricognizione per l'artiglieria.
Essa é uma unidade de 
reconhecimento de artilharia...