Strictly speaking, the story isn't autobiographical. However, I know enough about Webb's life to know that a number of details of the story bear close resemblance to events of his life. Therefore, if you want to understand Webb the man, you should watch this movie as well as read his book "Born Fighting".
The movie makes it obvious that Webb believes deeply in the concept of *honor*, as practiced by professional military officers. I am glad that some people in this modern world still live by this fundamental concept of personal honesty and duty. It is easy to understand why Webb has received endorsements from so many high-ranking officers.
I recommend "Rules of Engagement".
-Don