This information is classified within the Foundation, which maintains that the Insurgency defected in 1924 and that the actual defections in 1948 were simply raids made by the already-existing splinter organization. All attempts to find, apprehend, or assassinate the defecting Insurgency operatives failed.

The motives behind the Insurgency's betrayal remain unknown to the Foundation. The defection or even the slightest hint of disloyalty from Red Right Hand personnel had been unprecedented. Their covert black ops team had defected, and the Foundation faced a new threat from an organization now calling itself by a new name: the Chaos Insurgency. The Foundation's biggest lie had become a reality. The Insurgency seized SCP objects with great research and military potential and inflicted severe casualties to Foundation personnel. That same day, multiple other unplanned raids of Foundation facilities occurred. In 1948, as part of a seemingly routine staged operation, the Insurgency removed several SCP objects from Foundation containment and transported dozens of defecting Foundation researchers to various safe locations.

For approximately twenty-four years, the Insurgency operated under the guise of Foundation defectors, using anomalous objects to secretly further the goals of the O5 Council. In reality, the O5 Council had created the Insurgency to complete missions with ethically questionable methods and politically unsavory results-while keeping the Foundation's public reputation clean. with several researchers and anomalous objects. To the majority of the Foundation and the anomalous world, the Insurgency was a splinter group that went A.W.O.L. The Insurgency leadership was supported by research, security, and retrieval personnel, all taken from Foundation ranks. In 1924, the SCP Foundation formed a covert special task force, known only to the O5 Council, codenamed the 'Insurgency.' The leadership of the Insurgency was comprised of members of MTF Alpha-1, the Red Right Hand, famed for their loyalty to the O5 Council and the total secrecy of their origins, identities, and operations.

Squad vs insurgency