It was once a member-world of Xim's Empire. Once a swampy, wet world, its seas evaporated, making it into an arid, dusty world of valleys, plateaus, mesas, and colorful rock formations of red sandstone and blue granite. It was plagued by windstorms and sandstorms. Geodes were mined for their crystals.
At some point, the Galactic Empire subjugated the planet.
A plague sparked by the spice Tempest struck Endregaad in 19 ABY, and the world was quarantined by the Corporate Sector Authority.
- The Complete Star Wars Encyclopedia