https://en.wikipedia.org/wiki/Chollima_Movement
Citation #2 points to a book that collates many sources. Here's what it has to say:
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Wikipedia is just a collection of opinions laundered by loosely-relevant citations appearing next to them (or in this case, completely irrelevant ones).
I think Blowback Season 3 gets into it. They cover the war end-to-end. I can't even remember what podcast went into it first... TrueAnon or maybe Lions Led by Donkeys... The Dollup?
It was so long ago, I honestly can't recall.