The G.I. Joe Nemesis is the main antagonist of the G.I. Joe franchise, a fictional terrorist organization known as COBRA. COBRA is an acronym for 'Crimson Organization of Revenge, Battle, and Infiltration'. The organization is led by a mysterious figure known as COBRA Commander, who is determined to take over the world. COBRA's forces are composed of a variety of mercenaries, criminals, and terrorists from around the world. They are opposed by the G.I. Joe team, a group of highly trained special operatives. The conflict between G.I. Joe and COBRA has been a major part of the G.I. Joe franchise since its inception in 1982.