John James Rambo is the titular main protagonist of the Rambo movie/film series as well as the novel First Blood.
A Vietnam War veteran, Rambo returned home to reunite with his former squad mates, only to find himself battling against the Ligget County Sheriff Department. As the series continues, he fights against numerous threats that showcases his military tactics and combat prowess against his enemies. It should be noted that Rambo began as a villain in the novel and was adapted into a hero in future depictions.
Coincidentally, he shares his birthday with his actor, Sylvester Stallone, who was born in the year before him, 1946.
Steve McQueen (who passed away around the start of the 80s), Dustin Hoffman, Jeff Bridges, Robert De Niro, Michael Douglas, Paul Newman, Nick Nolte, Al Pacino, James Garner, James Woods, John Travolta, Chuck Norris, and Clint Eastwood were considered for the role before Sylvester Stallone was cast.
Jonathan Rambo from First Blood and John Matrix from Commando both resemble Lance Bean and Bill Rizer (The Contra Duo) from the Contra video game series with the similarities between video game characters/heroes and 1980s action movie/film characters/heroes and the portrayal of the 2 legendary actors from the 1980s, Sylvester Stallone and Arnold Schwarzenegger.
Both Stallone and Schwarzenegger are the only action movie actors/celebrities to have also co-starred together in the animated TV show, Liberty's Kids along with Liam Neeson and portrayed as the voice actors for the life people in a cartoon series, Paul Revere, Baron Von Steuben and John Paul Jones.
As mentioned before, Rambo was an antagonist in his first appearance, in which he was only named as "Rambo".