From the campaign:
Dawn: Rise of the Occulites is the first game in the Rise of the Occulites Saga. The Saga covers the evolution of the Occulites from small Tribes fighting for survival, to massive armies, diplomacy and the beginning of industry.
Dawn takes place at the very beginning of the Occulite’s evolutionary timescale. At this time the Occulites roam the lands in small Tribes, moving from cave to cave, collecting the precious Sungems to keep them warm during the Long Dark. They fight over territory and resources in an effort just to survive.