Stallone is a former Green Beret survivor of Vietnam whose nightmares of wartime horrors are triggered by a wrongful arrest in a small town. He escapes into the mountains of the Northwest and leads his pursuers to all manner of bloody ends. Finally, the Army is summoned to crush him. Extremely violent and frequently confused, fueled on the revenge fantasy and not much concerned with the rules of plot realism. Screen debut of Caruso. Based on David Morrell's novel. A boxoffice hit that launched the Rambo series. Followed by Rambo: First Blood, Part 2.