Destination was the planet native to the Dalmari. Humans colonised the planet during the early Segments of Time. The Master arrived on Destination after his TARDIS broke up during his flight from Gallifrey.
Posing as "the Inventor", the Master created a chamber in which time passed far more slowly than the rest of the planet. This allowed him to watch and guide the humans' industrial and technological progress with the aim of using nuclear fission to repair his TARDIS.
War broke out between the city people and the Dalmari, but was resolved by the First Doctor. The Master was sealed in his chamber and the people declared a new world of co-operation between the two species. (AUDIO: The Destination Wars)