After the Republic had moved on, the lords emerged from their refuges to a world in ruin. What industry that had been established had been devastated, almost all means of interplanetary travel was lost, and almost every trace of Sith culture and knowledge the Jedi could find had been looted or destroyed. Anticipating that attempts to communicate with the rest of the Sith Empire would draw attention, the surviving lords remained isolated in their enclaves, rebuilding their fortresses and cautiously expanding their influence.
 
The survivors of the planet’s slave population—those freed after the deaths of their masters—began to establish their own settlements in the more temperate and sub-tropic regions of the planet, away from the Sith’s lairs. By the time the Sith lords encountered these populations they found themselves unable to conquer them, outright. Hundreds of years of these groups living side-by-side resulted in the mixing of governance and bloodlines. Eventually groups of leaders—progressing toward feudal houses of Red Sith and human families—controlled most of the inhabited areas of the planet. Large-scale political alliances began to form, with many crowning emperors and kings over the lords of Drezzi.
 
Though given hundreds of years and a starting technological understanding equal to the rest of the Old Sith Empire at the time of its fall, many of the previously-accessible resource reserves were no longer able to be exploited due to the devastation wrought by the Republic. Industrial expansion was slow during the re-establishment of Drezzi due to the lack of readily-available resources. Its technological progress was slowed considerably due to a lack of a major hyperspace lane passing through the world’s system, limited resources, and self-imposed isolation.
 
The people of Drezzi focused on the affairs of their own kingdoms. The world’s Sith, having lost those most war-inclined in them long-ago, turned to politics and their explorations of the Force. A period of relative peace began, and cultural development flourished.