Some time after the Thousand Year War, the planet Skaro had become a nuclear wasteland. Its principal features were the petrified jungle, in which the Thals lived, and the city of the Daleks. The First Doctor and his companions, Ian, Barbara and Susan, visited Skaro at this time and led some of the Thals to attack the Dalek City. They disabled the power generator and deprived the Daleks of the static electricity they needed to move about the city. (TV: The Daleks) The Third Doctor and Taron identified this period as the First Dalek War. (PROSE: Doctor Who and the Planet of the Daleks) Federation Archivist Ven Kalik used the same name to refer to the Daleks' invasion of Earth and its colonies in the 22nd century. (PROSE: Prelude Deceit)