Donald Bellisario Relied on His Real Experience
Show creator Don Bellisario relied heavily on his past experience when he wrote the show. He serves in the US Marine Corps as a Gunnery Seargent. The Marine Corp ethos and knowledge of Marine methodology presented in the show all stem from his real life experience.
Many of the protagonists in his shows are current or former members of the armed forces. This is true in Magnum PI, JAG and NCIS. He received a star on the Hollywood Walk of Fame in 2004.