The Er'stacians were a race of ape-like reptiloids native to the planet Er'stacia. They were continually at war with itself, as various factions fought over control of their only artifact, the Megalith. They were believed to have descended from creatures which evolved in great tidal pools, and each clan could trace its roots back to a specific birth-pool. Mace Windu was dispatched by the Jedi Council to negotiate a peace treaty among the Er'stacians, but was met with a dim-witted opposition that stemmed from the ingrained belief that the Megalith could not be shared. In his growing frustration with the Er'stacians, Master Windu destroyed the Megalith, leaving the Er'stacians to figure out what to do with the thousands of pieces left behind.