The Yerej system, a star system, was situated in the Tungra sector of the Outer Rim Territories. The planet Yerej was a component of this system.
In the era of the Galactic Civil War, the system served as the location for the Drekker Industries Special Materials Factory known as Drekker. This facility was an Imperial Deep Space Manufacturing Facility. A Rebel Alliance Nebulon-B escort frigate, named the Meteor, along with its Z-95 Headhunters squadrons, launched an assault on this factory.