"In Thailand, John Rambo joins a group of mercenaries to venture into war-torn Burma, and rescue a group of Christian aid workers who were kidnapped by the ruthless local infantry unit." (imdb)
If you prefer the PG18 kind of story telling, with graphic blood and breathtaking filmography, then you are in for a treat. I do not think you really need the first couple of movies in this series to watch and understand this one, if you want to, have at it, I have reviewed all of them so far. But this one I think was by far the best, simply because it felt more down to Earth, believe it or not. Rambo showed skill, and not so much sheer luck. The first will always be a classic, but other than that, I think people need to see the world as it is right now, and let me tell you: it's ugly.
Until the next item on my list!