Factual error: when Mac Taylor's ID card from the Marine Corps is being shown, there are two unintentional mistakes and one probably intentional. First, the design of the ID card in no way resembles an actual DoD issued military ID, but this was probably an intentional mistake by the creators of the show. The picture on the ID however, has two unintentional mistakes. First, Marines are never photographed in their dress blues for official purposes; Mac would have been in cammies or service dress charlies for the photograph. Second, Mac is revealed in several episodes to have been an officer, yet he is shown wearing the dress blues of an enlisted man.