Near the end of the Age of Enthronement, the vale was also a major trade route between Cheliax and its northern holdings in Varisia. The trail, however, fell into disuse during the Chelish Civil War and was eventually overtaken by the encroaching wilderness. In 4707 AR, King Arabasti of Korvosa called upon Sir Gyrad Tolgrith to reclaim the vale and reopen the trade routes, resulting in the founding of Fort Thorn within the vale to aid in this effort.