What is the author's style in Going After Cacciato by Tim O'Brien?

This story is told by a soldier, and in simple soldier's language. The language is meant to convey a time and place where an educated, thinking person is not appropriate; where fancy words and ideas had nothing to do with the simple survival of every moment. Doc is respected for his way with words and his advice but none of the men strives to speak like him or learn from him other than what is absolutely necessary to survive.