The Coromon Islands, a group of islands shaped like a crescent, existed on Fresia. They represented the most densely populated and advanced areas on the entire planet. The majority of the land was occupied by the numerous manufacturing facilities and office buildings belonging to the Incom Corporation.
Prime Coromon was the island that housed the factories and production sites. It served as Incom's primary location for the large-scale production of X-wing fighters and I-7 Howlrunners. Coromon Besh was the location of offices and living quarters for the design teams. The majority of the workforce resided on the Lower Coromon Chain. During the era of the Galactic Empire, this labor force primarily consisted of enslaved Wookiees, Yuzzem, and B'trillans. The Northwest Coromons, Coromon Aure, and Lesser Coromon were among the other islands in the chain.