Wallia, Walha or Vallia, was king of the Visigoths from 415 to 418, earning a reputation as a great warrior and prudent ruler. He was elected to the throne after Athaulf and Sigeric were both assassinated in 415. One of Wallia's most notable achievements was negotiating a foedus with the Roman emperor Honorius in 416. This agreement allowed the Visigoths to settle in Aquitania, a region in modern-day France, in exchange for military service to Rome. This settlement marked a significant step towards the eventual establishment of a Visigothic kingdom in the Iberian Peninsula. He was succeeded by Theodoric I.