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 Soldier (Army), Action Sailor (Navy), Action Pilot (Air Force) and Action Marine (Marines). The term G.I. stands for Government Issue 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."
he premise of the cartoon 1985 series was "good vs. evil". The show's opening theme song included the narration: "G.I. Joe is the code name for America's daring, highly trained special mission force. Its purpose: to defend human freedom against Cobra, a ruthless terrorist organization determined to rule the world".
The show featured physical fighting and high-tech weapons as a way to compensate for toned-down violence and lack of bullets in what was intended to be children's program. The show also featured public service announcements placed at the end of each show. These PSAs ended with the phrase: "Now you know, and knowing is half the battle." The series ran for a total of 95 episodes, from 1985 to 1986.
Throughout the existence of the G.I. Joe media franchise, there have been several video games released.
Source: Wikipedia, "G.I. Joe", available under the CC-BY-SA License.