In Good Morning Vietnam, Robin Williams stars as Adrian Cronaur. Adrian is not only the main character, but he is also the person whose point of view most of the movie was filmed. The feel of the beginning of the movie is almost a clear a reflection of the way America first felt about the war, just as the end and other turning points in Adrian's time in Vietnam expresses the feelings of the American public.
We feel, from beginning to end, the same way that Adrian feels, moment to moment. We start with the feelings he does that this "police action" is practically a joke. The director truly succeeds and makes us believe the views, and feel the intensity of emotion that is projected by his Adrian character. It is not until he realizes that what is going on is real and no joke, that we too feel the severity of the situation.
We also learn and disapprove of the military's actions through out in the same way and time he does. We are completely sympathetic to Adrian's state of mind at all times. We see what he sees, experience what he experiences become confused, hurt and astounded just as he does. The director, in a sense, runs us through a sequence of emotions to as the story progresses and develops our sense of distrust as develops Adrian's.
The movie all takes place in Vietnam, but we never see any real fighting. We don't even see very much of the army. In the beginning we listen to the American radio show that is broadcast for the men in the line of fire, and basically see the same few officers. The radio station decides that is wants to bring in a new DJ to liven the show...