While the story isn't explicitly presented as an autobiography, it's heavily based on O'Brien's own experiences in the Vietnam War. The narrator shares many similarities with the author, and many of the events in the story are known to be real events from O'Brien's life.
It's important to note, however, that the narrator also blurs the lines between reality and fiction. The story is a blend of factual events and imaginative storytelling, and the narrator often reflects on the nature of truth and memory. This creates a complex and powerful narrative voice that allows the reader to engage deeply with the themes of war, trauma, and the human experience.