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No, he is a character in a movie. There was a man named John Rambo who fought in Vietnam. But he died in the war. The character was not based on him.
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.
Since the fourth movie does not have John Rambo die- they were planning to make another one sometime in 2011. But now Sylvestor Stallone says that series is done for and he is never playing the character again at all.
The plot of the movie Rambo 3 is that the government needs Rambo to fight some bad people. Rambo then attacks the bad people and wins, and saves the world.
The only person John Rambo is Based ON is John rambo But to answer Your question he is a fictional character (that means he is not real).
John Rambo. The main character of the Rambo series.
Rambo: First Blood Part II
quote from a rambo movie...it was Rambo.