There is no “Mongol Heleer” in 71: Into the Fire . The film is strictly about Korean War student soldiers.
The formidable North Korean commander whose presence serves as the ultimate test for the student soldiers. 71 Into The Fire Mongol Heleer
Most likely, the master tape of 71 Into The Fire was wiped and reused in 1975 to record a propaganda speech about grain harvests. Such was the fate of "unapproved" art in the Eastern Bloc. There is no “Mongol Heleer” in 71: Into the Fire