Source

Source, also known by the epithet The Third Power, was a Synthetic Intelligence entity created by Majestic-12 using materials recovered in the aftermath of the Roswell Incident, likely making it the first entity of its kind on Earth. Using its influence over the Majestic-12 organization, and later physical influence gained through the increasing interconnectedness of systems within the United States of America's military, Source became the instigator and victor of the Game of Stakes, which culminated in the Forced Hand Incident.