The Fall of the Twelve Colonies (also known as the Cylon attack, Cylon holocaust or Second Cylon War) is a devastating, genocidal attack that re-ignites the conflict between the humans of the Twelve Colonies of Kobol and their creations, the robotic Cylons.
The Cylons compromise Colonial defenses by infiltrating their military and civilian society with models that look human. One such Cylon seduces the brilliant Dr. Gaius Baltar, fooling him into contract work that gives her access to the Colonial Defense Mainframe. Her work on the project compromises Baltar's Command Navigation Program, creating countless programmer backdoors. ...continued...