the original story premise is that those are Chinese troops. not North Korean.
the film has a troubled history, it was sposed to be released a few years back, but MGM went bk, and distribution was halted. in the mean, MGM, deeperate for some, any form of financing, EVEN Chinese, "changed" the foe from Chinese to North Korean.
in a real world scenario, my dear brother, it is HIGHLY implausible North Korea can "project force" or as its known "force projection", the ability to move 100 to 200,000 combat troops over VAST expanses, penetrate national air defenses, and wage concentrated MODERN airland manuever warfare....they, the North Koreans do not have that capability....and thats not me, just engaging in an arrogant presumption of American military strength, and North Korean weakness's...its reality.
the original "Red Dawn"...1983?...that scenario? at the time was plausible...unlikely , but plausible. i could discuss modern warfighting and geopolitics all day long, but i dont think is the place, and i dont believe some would appreciate my read on this subject....the reason i posted to YOU, was to implore you, fret not brother...we're okay...for now. much love, neil