First Blood is a 1982 American action film directed by Ted Kotcheff and co-written by Sylvester Stallone, who stars as Vietnam War veteran John Rambo. It also 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 and 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