John Rambo is a fictional character created by author David Morrell in his 1972 novel, "First Blood." He is a former Green Beret and Vietnam War veteran known for his combat skills and survival abilities. Rambo's character became widely recognized through the film series that began with "First Blood" in 1982, starring Sylvester Stallone. The Rambo films explore themes of trauma, isolation, and the struggles faced by veterans. The character often finds himself in conflict with authorities while trying to help others, showcasing his complex personality and moral dilemmas. Rambo has become an iconic figure in popular culture, symbolizing resilience and the impact of war on individuals.