Quite notably, even though the social order of the Reich was collapsing, the Army itself remained pretty strongly beholden to the old conservative organization. While there was social revolution in many major cities, and in Kiel the German navy mutinied and elected worker and sailor councils modeled off the soviets, the Army remained mostly intact.
Your challenge is to create a scenario where the enlisted men, NCOs and perhaps junior officers mutiny against the Reich. Special bonus points if they support USPD led revolutions.