"decided in General Dreedle's favor by ex-P.F.C. Wintergreen"

This is another example of power (in the form of military command hierarchy) being overturned by sheer whim and arbitrariness. Former Private First Class Wintergreen, a mere mail clerk, “settles” a power struggle between General Dreedle and General Peckem by tossing the latter’s mail in the trash.

The action is not entirely arbitrary -- Wintergreen chooses his action because he finds General Peckem’s communications “too prolix” while General Dreedle’s views were expressed in a “less pretentious literary style” and “pleased” the private -- but it is utterly contrary to the way official decisions are supposed to be made in the Army.

A similar relationship -- though more open, ongoing, and intimate -- exists between Corporal Walter Eugene “Radar” O’Reilly and his commanding officers during the Korean War, Lt. Col. Blake and then Colonel Potter, as depicted in the movie “M*A*S*H” and its long-running television spinoff.