It's been nearly 40 years since First Blood arrived in theaters, introducing the world to a Vietnam veteran named John Rambo. That movie paints the traumatized war hero as someone who doesn't want to kill, even though he can with ease. The three sequels that followed quickly cast that aside, instead indulging in the kind of over-the-top violence that action movies in the '80s were known for. Rambo blew things up, crashed tanks into helicopters, and seemed satisfied with the very high body count.