The character of Green Beret "John Rambo" was the creation of Canadian-born writer David Morrell, and his novel was adapted to the screen with Stallone in the lead role in First Blood (1982), also starring Richard Crenna and Brian Dennehy. The movie was a surprise hit that polarized audiences because of its commentary about the Vietnam war, which was still relatively fresh in the American public's psyche. Political viewpoints aside, the film was a worldwide smash, and a sequel soon followed with Rambo: First Blood Part II (1985)