Bresnan, a world located within the Wellte-ir system in the Mid Rim, was situated in the Trax sector; it was designated as a planet.
Ki Sazen, a Jedi, took part in the signing of the Treaty at Bresnan during the time of the Cold War.
Many years afterward, during the era of the Galactic Civil War but before the Battle of Yavin, the Wellte-ir Massacre transpired on Bresnan. On the plains of Bresnan, fifteen out of twenty-one members of the Rebel Alliance's Scandium Team perished; the surviving Special Forces infiltrators numbered six: Aven Cholus, Commander Dutra Zeneta, Harovan Toth, Korgath, Opit-Wenbruh, and Rith Tar'ak while Nyik and Tor'ara were among the deceased.