During the war with the Ancients, the Wraith captured many worlds in Pegasus with human populations to use as feeding grounds. They also control some uninhabited planets which they use as outposts, construction sites, and research bases. In the aftermath of Death's defeat and subsequent death, the remaining Wraith forged a peace agreement and, as such, half of the Pegasus galaxy controlled by the Wraith was given to the Tau'ri. (SGA: "The Lost") (SGA: "Legacy")