G.I. Joe is the code name of an elite covert special mission unit operating under the control of the United States Military in the fictional G.I. Joe universe.
They are sometimes referred to as the G.I. Joe Team, the Joe Team or simply the Joes. The G.I. Joe Team was first introduced in the 1982 G.I. Joe: A Real American Hero toy line from Hasbro. Subsequently, comic books and television cartoons based on the revamped toy line were also released. Prior to this, G.I. Joe was the name of the military and later adventure character that appeared throughout the 1960s and 1970s. From 1982 and on, the name tends to refer to the group rather than the classic character.
Their battle cry is "Yo Joe!"