The Cylon Civil War is a conflict between two factions of humanoid Cylons. One faction consists of the Number Ones, the Number Fours, the Number Fives, and the Number Eight copy known as Sharon Valerii, under the leadership of the Number One copy known as Cavil. The opposition, known as the rebel faction, consists of the Number Twos, the Number Sixes, several Centurions with restored free will, and the majority of the Number Eights, under the leadership of the Number Six copy known as Natalie. Natalie is later slain, and leadership of the rebels is taken up by the restored Number Three copy known as D'Anna until she elects to remain behind on Earth for the rest of her days. ...continued...