"G.I. Joe is a line of action figures produced by the toy company Hasbro. The initial product offering represented four of the branches of the U.S. armed forces with the Action Soldier (U.S. Army), Action Sailor (U.S. Navy), Action Pilot (USAF), Action Marine (USMC) and later on, the Action Nurse. The term G.I. stands for Government Issued and became a generic term for U.S. soldiers (predating the action figures), especially ground forces. The development of G.I. Joe led to the coining of the term "action figure". GI JOE's appeal to children have made it somewhat of an American icon among toys.
The G.I. Joe trademark has been used by Hasbro to title two different toy lines. The original 12-inch line that began in 1964 centered on realistic action figures. In the United Kingdom, this line was licensed to Palitoy and known as Action Man. In 1982, the line was relaunched in a 3¾-inch scale complete with vehicles, playsets, and a complex background story involving an ongoing struggle between the G.I. Joe Team and the evil Cobra Command which seeks to take over the Free World through terrorism. As the American line evolved into the Real American Hero series, Action Man also changed, by using the same molds and being renamed as Action Force. Although the members of the G.I. Joe team are not superheroes, they all had expertise in areas such as martial arts, weapons and explosives.
G.I. Joe was inducted into the National Toy Hall of Fame at The Strong in Rochester, New York, in 2004."
Source: Wikipedia, "G.I. Joe", available under the CC-BY-SA License.