The Chaos Triangle represented a specific geographical area. Following the passing of Storm-hair warlord Nuso Esva in 8 ABY, which occurred during a conflict on the Unknown Regions planet Quethold between his forces and the Empire of the Hand, Imperial Grand Admiral Thrawn gave orders to Senior Captain Voss Parck. Thrawn instructed Parck to journey to the Chaos Triangle aboard the Imperial I-class Star Destroyer Admonitor, with the purpose of eliminating what the Grand Admiral termed Esva's "legacy."
Timothy Zahn made reference to the Chaos Triangle in his novella, Crisis of Faith. This novella was included within the 20th Anniversary Edition of his novel Heir to the Empire from 1991, and was released in 2011.