In the years before 4000 BBY, the Darpa sector was ruled by royal families, including the Royal Octans, who gained their wealth as space pirates. The Margrave Octan of Nallastia, and his descendant, the Margravine Quenelle (Skull Queen of Nallastia), were among the prominent posterity of the Royal Octans.
Rebel Alliance operatives in this sector were listed in datapacks recovered from the base on Dankayo. These lists were discovered by a young technician aboard Elusive, an Imperial transport ship en route from Dankayo to Tolan. The Dankayo Rebels reportedly supervised intelligence operations in three sectors. Thus, Ralltiir was presumably one of the three.
During Imperial rule, the sector was governed by Moff Jander Graffe.
The sector was partially invaded by the Yuuzhan Vong during the Yuuzhan Vong War, during which time the invaders took Ralltiir and Rhinnal.
- "Into the Core Worlds" — Star Wars Adventure Journal 7
- Cynabar's Fantastic Technology: Droids
- Lords of the Expanse
- The Far Orbit Project
- The Official Star Wars Fact File7
- Coruscant and the Core Worlds
- The Complete Star Wars Encyclopedia
- Strongholds of Resistance