The Rakata species had created a glorious Infinite Empire with their Force-fueled machines, but cracks were beginning to show. The cruelty of the Rakata to their slaves and occupied worlds grew more pronounced. If a planet's population rebelled, that entire world would be burned to glass.
Despite this, more slave rebellions began to rise across the galaxy, forcing the Rakata to divide their forces to deal with them. A plague, either created by the rebelling slaves or by Rakata dissidents, began to decimate the Rakata population. The Rakata realized that, possibly due to the plague, they were losing their connection to the Force; without it, they were cut off from their technology.
The fall of the Infinite Empire, once it began, was swift. The slaves overwhelmed their Rakata overseers, who fled into the Unknown Regions of the galaxy. The Rakata degenerated into a tribal culture and even resorted to cannibalism. The Infinite Empire was gone; only its technology was left behind.