The Defense line during the Mandalorian Wars.
During the Mandalorian Wars, specifically in 3964 BBY, the Jebble-Vanquo-Tarnith line represented a demarcation between the forces of the Galactic Republic and the Neo-Crusaders in the Outer Rim. It is believed that this line was established around 3966 BBY because Lhosan Industries successfully lobbied the Republic to safeguard the resource worlds surrounding Taris.
This defensive line was positioned in proximity to the planets of Jebble, Vanquo, Tarnith, and of course, Taris. Captain Saul Karath of the Republic Navy held responsibility for a segment of this line, alongside Admiral Jimas Veltraa.