First Blood is a 1982 American action film directed by Ted Kotcheff and co-written by and starring Sylvester Stallone as Vietnam War veteran John Rambo. It co-stars Richard Crenna as Rambo's mentor Sam Trautman and Brian Dennehy as Sheriff Will Teasle. It is the first installment in the Rambo franchise, followed by Rambo: First Blood Part II. The film is based on the 1972 novel First Blood by David Morrell, which many directors and studios had unsuccessfully attempted to adapt in the 1970s.
https://en.wikipedia.org/wiki/First_Blood