The Zaloriis system, a part of the Expansion Region's the Slice region, was situated within the Askarian sector. This star system was the location of Zaloriis, a barren desert planet. The Zaloriis system was linked to the Circarpous and Attahox systems via the Nanth'ri Route hyperlane. Human inhabitants known as the Zalorians resided on Zaloriis, and their language was Galactic Basic Standard.
During the time of the Galactic Civil War, the Zalorians sought independence from the Galactic Empire and allied themselves with the Alliance to Restore the Republic. Not long before the Battle of Hoth in 3 ABY, Darth Vader, the Sith Lord, was on a mission to find the secret Rebel base and journeyed to Zaloriis to find out why the planet had not paid its monthly tax to the Empire. Vader arrived in the Zaloriis system aboard his Super Star Destroyer, the Executor, accompanied by another Imperial-class Star Destroyer, a squadron of TIE fighters, and a Lambda-class T-4a shuttle. Vader's forces located and destroyed the Rebel presence on Zaloriis.
The LucasArts video game Star Wars: Galactic Battlegrounds, released in 2001, was the first appearance of the Zaloriis system. The 2009 reference book The Essential Atlas identified its location as grid square P-12 within the Expansion Region, which superseded the Galactic Battlegrounds placement of Zaloriis in the Outer Rim Territories.