Eons ago, a species of star-shaped organics created the Silentium to resemble their form, in much the same way that humanoid sentients created bipedal droids. Though the organics were wiped out by a radiation storm from a nearby supernova, their droid creations lived on. These droids continued to reproduce and improve themselves, and developed a culture based on the prime numbers of five, seven, and eleven. The two sides fought a galactic war until the Yuuzhan Vong, one of the galaxy's native organic species, rose up and forced the droid species to flee.