Isembard (also spelled Isembart or Isembert) was a

vassal A vassal or liege subject is a person regarded as having a mutual obligation to a lord or monarch, in the context of the feudal system in medieval Europe. While the subordinate party is called a vassal, the dominant party is called a suzerain. W ...

(''vassus'') of

Charlemagne Charlemagne ( , ) or Charles the Great ( la, Carolus Magnus; german: Karl der Große; 2 April 747 – 28 January 814), a member of the Carolingian dynasty, was King of the Franks from 768, King of the Lombards from 774, and the first Holy ...

. According to the ''

Vita Hludovici ''Vita Hludovici'' or ''Vita Hludovici Imperatoris'' (The Life of Louis or the Life of the Emperor Louis) is an anonymous biography of Louis the Pious, Holy Roman Emperor and King of the Franks from AD 814 to 840. Author The work was written ...

'', in 805 he took part in

Louis the Pious Louis the Pious (german: Ludwig der Fromme; french: Louis le Pieux; 16 April 778 – 20 June 840), also called the Fair, and the Debonaire, was King of the Franks and co-emperor with his father, Charlemagne, from 813. He was also King of Aqui ...

's campaign against the

Emirate of Córdoba The Emirate of Córdoba ( ar, إمارة قرطبة, ) was a medieval Islamic kingdom in the Iberian Peninsula. Its founding in the mid-eighth century would mark the beginning of seven hundred years of Muslim rule in what is now Spain and Port ...

. He, along with Adhemar,

Bera Bera may refer to: Acronyms * Bioelectric recognition assay, a method in electrophysiology * Botswana Energy Regulatory Authority, an energy regulatory body in Botswana * Brainstem evoked response audiometry, a screening test to monitor for heari ...

and Burrellus, was one of the leaders of the raiding party that crossed the

Ebro river , name_etymology = , image = Zaragoza shel.JPG , image_size = , image_caption = The Ebro River in Zaragoza , map = SpainEbroBasin.png , map_size = , map_caption = The Ebro ...

, sacked the Muslim base at Villa Rubea and defeated an army in pitched battle. After twenty days' raiding, they rejoined the main army besieging

Tortosa Tortosa (; ) is the capital of the ''Catalonia/Comarques, comarca'' of Baix Ebre, in Catalonia, Spain. Tortosa is located at above sea level, by the Ebro river, protected on its northern side by the mountains of the Cardó Massif, of which Buin ...

. Isembard may have been leading his own men on this campaign. Bernard S. Bachrach, "Military Organization in Aquitaine under the Early Carolingians", ''Speculum'' 49, 1 (1974): 27.

Notes

{{Reflist People of the Reconquista