Erebus was a planet located in the galaxy. A mountainous and muddy world, Erebus had valuable resources that would be extracted by Imperial strip mining, which left the terrain even more barren and potholed. Erebus housed an Imperial labor camp which utilized prisoners for their mining operations.
Around 18 BBY, Clone Force 99 landed on Erebus to infiltrate the labor camp and extract former Vice Admiral Edmon Rampart in order to acquire the coordinates of Tantiss Base from him.