What Viet Cong parallels? Whatever you mean, it can’t have been very visible to the audience, since clear Viet Cong sympathies would not have gone over well (at least not universally) in 1977-1983.
This 3 minute clip of a conversation between George Lucas and James Cameron might help.
https://youtube.com/watch?v=fv9Jq_mCJEo
This 3 minute clip of a conversation between George Lucas and James Cameron might help.
https://youtube.com/watch?v=fv9Jq_mCJEo