https://en.m.wikipedia.org/wiki/Talk:The_Battle_at_Lake_Changjin
The reasoning? Because reliable sources such as CNN, BBC, WaPo, NYT, Bloomberg, and Business Insider call it “propaganda department,” therefore the neutral stance would be siding with those reliable sources.
Actually it's the other way around, "public relations" is an invented euphemism for what used to be apolitically called "propaganda".
Every company used to call their advertising department the "propaganda department" until it became associated with describing only what political enemies do.