In one parallel universe, the Kaleds were a species native to Skaro. "Centuries" prior to the Dalek Time Strategist arriving on this reality's Skaro, the Kaleds had warred with the Thals before, according to legend, the races of Skaro were attacked by the Time Lords, seeking to destroy the Kaleds. According to the same legends, this prompted a permanent unity between the Skarosian races which led to the destruction of the Time Lords. In this peaceful world, some Kaleds even married Thals.
When the Dalek Time Strategist arrived on Skaro, he manipulated Davros into helping him, the Strategist commencing a fusion of realities to resurrect the Dalek Empire, the Kaleds of the planet slowly turning into their Dalek counterparts from other realities. (AUDIO: Palindrome)