It started out as a trilogy in the 1980's- but a fourth one was made later in 2008.
Rocky series and Rambo series
John Rambo was the main character in a series of Sylvester Stallone movies. In order they are First Blood, Rambo: First Blood Part II, Rambo III and Rambo.
Currently, there are four films in the Rambo series. They are First Blood (1982), Rambo: First Blood Part II (1985), Rambo III (1988) and Rambo (2008). In 2012, Sylvestor Stallone was in the process of writing a fifth film, but it has since been put on hold.
John Rambo. The main character of the Rambo series.
The series consists of four films: First Blood (1982) Rambo: First Blood Part II (1985) Rambo III (1988) Rambo (2008)
"First Blood" (1982) "Rambo: First Blood Part II" (1985) "Rambo III" (1988) "Rambo" (2008) Alternate title: "John Rambo"
First Blood (1982)Rambo: First Blood Part II (1985)Rambo III (1988)Rambo (2008)
The fifth film was set for a possible release in 2011- but Sylvestor Stallone has confirmed that the Rambo series is now done forever.
VIBGYOR
Dottie Rambo was only married one time to Buck Rambo. After their divorce, he got married again, but she never did.
Currently there have been screenplays submitted for Rambo V but it has not been picked up or put in production. There are also talks of a potential TV-series or a movie prequel.
Yes, "First Blood" is a novel by David Morrell that was published in 1972 and was the basis for the popular "Rambo" film series starring Sylvester Stallone.