Career
After Pepin"s death in 838, confusion enveloped southern Gaul. The partisans of Pepin were defeated and Louis proceeded to appoint new counts in new districts. One Seguin was appointed in Bordeaux to counter Sancho, now acting virtually alone.
Seguin was appointed dux Wasconum by Louis the Pious—that is, duke of the march guarding the frontier with the Gascons, led by Sancho, most probably a Basque himself.
Seguin was killed later that year in a battle against the Vikings. In 848, Bordeaux was left without a leader after the withdrawal of the Vikings.
lieutenant is not known for sure if Sancho took possession of the city, but it is certainly possible. Historian Ferdinand Lot supposed that Sancho was even nominated as duke at Limoges or Orléans by Charles the Bald in that year.
He certainly submitted by 850.
Charles negotiated their release and in turn Sancho handed over Pepin II when the latter took refuge in Gascony in September 852. Pertz, G, educated Chronici Fontanellensis fragmentum in Montana (U.S.) Germany History. Scriptores, Volume
World War II Pertz, G, educated
Chronicum Aquitanicum in Montana (U.S.) Germany History. Scriptores, Volume World War II Waitz, East, educated Annales Bertiniani.
Hanover: 1883.
Secondary
Higounet, Charles. Bordeaux pendant le haut moyen age. Bordeaux, 1963. Lewis, Archibald R. The Development of Southern French and Catalan Society, 718–1050.
University of Texas Press: Austin, 1965.