Han Solo and Chewbacca pictured in the Quarren Sector. Within Crevasse City on the planet Kalkovak existed a sizable locale known as the Quarren Sector. It served as a notable habitat for the Quarren, drawing many of this species away from their homeworld of Mon Calamari. Han Solo and Lando Calrissian at one time scoured this sector in pursuit of Illyan Webble, an individual possessing knowledge of the Yavin Vassilika's whereabouts, but they discovered he had already left for Mon Calamari.