In his autobiography, Chuck Norris stated that he made this film as a memorial honor of his younger brother Wieland, who was killed in the Vietnam War in 1970.
Filmed right after_Missing in Action 2: The Beginning (1985)_, this film was supposed to be the sequel. However when the producers realized this film was the better of the two, they simply renamed them and made the other film a prequel to this. This explains why Steve Bing receives a credit for "characters" because he wrote the screenplay for what became the prequel.
Aaron Norris (Chuck's Brother) was the stunt coordinator for the two sequels even though he was uncredited in the 2nd one, then he became the director of the last Missing in Action film.
Both the North Vietnamese and Vietnam People's Army are seen using the Chinese Type 56 assault rifle - originally produced in the People's Republic of China as a licensed copy of the Soviet AK-47 (when technology transfer between both nations were commonplace) prior to the Sino-Soviet split in 1962.