Like a little more violent episode of Magnum P.I.
It's pretty cheesy, same music as Magnum, Vietnam veterans running into some thugs, a little romance. Could have been about 40 minutes long, the same as an episode of Magnum. Seventies had some really bad movies that people are nostalgic about. I guess I can see why this is one of them, but exactly.
Obviously Tarantino liked it. Thank God he is smart enough to take only the truly great elements about these kind of movies. Sometimes there are very few.