After being demoted from his previous director's position in the CIA after Operation Snake Eater, and subsequently sent to oversee the Agency's activities in Central America, an embittered Hot Coldman decided to initiate the development of the Peace Walker Project. Believing that only a machine intelligence could carry out the principles of mutually assured destruction (and motivated to regain his former position), Coldman aimed to create a "perfect nuclear deterrent" through the use of AI weapons, and commanded the Peace Sentinel unit to achieve this end.