Governor of the brand top of al - Andalus born to 800 and died in 862. Related to the Arista of Pamplona and in the service of the Emirs of Córdoba, came to gather in their hands an enormous power that made him call themselves the third King of Spain.
Belonging to the dynasty of the Banu Qasi, was son of Musa ibn Fortun and uterine brother Iñigo and Fortún Íñiguez of House Arista of Pamplona Navarre and married Assona, belonging to the aforementioned House. To 817 the Banu Qasi settled in Tudela, probably according to the Governor of the upper border, the future of Abd al-Rahman II. When it ascended to the throne in Cordoba, Musa, Chief at the time of her family, received the post of Governor of Tudela and its region. In 824 led the Muslim army in fight against the Franks in Cerdagne and Narbonne, collaborating with its relatives, the edge, and rejecting the counts Eblo and Aznar, sent by Louis the pious. Collaboration between muse and the emir continued during the following years and materialized in expeditions against Alava in 824 and 825, 837, and in 841 Musa ibn Musa very was actively involved in a campaign that is sent by the Amir against the Christians in the Pyrenees, leading the vanguard of the Muslim army.
But shortly after the campaign of the Pyrenees had a personal confrontation with al - Mutarrif, son of the emir of Córdoba, by not personally attend a razzia against Pamplona; Although he sent his son Fortun, Musa remained in the fortress of Arnedo, which angered thereby al - Mutarrif that on his return to Córdoba appointed wali of Zaragoza to Bazi ibn Harit brand, whom he sent against Musa. Harit defeated Musa near Borja and later laid siege to Tudela, where Musa had taken refuge. You saved a life in Exchange for the delivery of the square and fled to Arnedo where it was again besieged by Harit. So Muse asked the help of García Íñiguez of Pamplona and together Harit attacked with Cavalry, defeating him near Calahorra and doing prisoner.
The following year Musa concluded Amnesty with the emir and freed the prisoners, who joined the Muslim army to carry out an expedition of punishment against the navarros. The emir then signed peace with García Íñiguez, but both this and Musa ibn Musa broke the agreement, triggering the violent campaign of the cordoban emir on the lands of Pamplona. Musa led the cavalry in the defense and the battle took place at the end of July of 843, beating Abd al - Rahmán and having to flee Musa on foot, having lost his horse. A year following Musa was subjected in Tudela to the son of the emir, Muhammad and took part of the Muslim side in a new campaign against Pamplona.
In November of 844 Musa the emir received a request for aid against the Normans pirates who had landed in Lisbon and were plundering the coast of Andalusia. In the letter it was revealed ties clientele between the Umayyad with the Banu Qasi and Musa went to Andalusia, taking an important role in the defence of Seville.
However, during the following years Musa uprisings against the central power, continued producing although it seems that his enmity was more headed for the delegates of the emir to towards the own Abd al - Rahmán, specifically against Abd Allah ibn Kulayb, amil of Tudela brand. In the uprising of July's 850 Muse was aided by his half-brother Íñigo Arista; in Amman (capitulations of peace) with the emir also the navarro took part. In 851 Musa fought against Ordoño I of Asturias; According to Muslim chronicles the victory was theirs, despite receiving thirty-five lanzazos in its loriga; Christian Chronicles awarded victory to the Asturian King. Whatever it was, this confrontation was revealed the change of policy of Musa, who was unlinking the edge and approaching the emir. Soon Musa was also appointed wali of Tudela and in October 852 of Zaragoza. With the new emir, Muhammad I, was appointed Governor of all top brand and built the fortress of Albelda, South of Logroño, to defend their States.
In 854 it provided support to Muhammad in a revolt of the Toledo, where the Christians counted with the support of Ordoño I and the King of Pamplona, defeating Musa at Guadalcelete. In the year following Musa directed the punitive expedition launched by Muhammad against the lands of Alava. There are also in 859 reported an attack by Musa Pamplona, although on this occasion he was defeated and that same year was conquered by Ordoño I at monte Laturce (Clavijo) and wounded in battle; Albelda was occupied by the Asturian monarch. In 861 Musa attacked the Catalan counts, coming close to Barcelona and Tarrasa appropriating. At that time called the third King of Spain himself and dominating over the Valley of the Ebro and Monjardin Montejurra. In the course of an attack on Guadalajara was badly hurt, dying before returning to Tudela. His domains were inherited by their children, who did not have his talent nor came to exercise its authority.
DOZY, R. Histoire des Muslim d'Espagne juste la conquête de l' Cordoba pas les Almoravides. Paris, 1932.
LACARRA and DE MIGUEL, J.M. history politics of the Kingdom of Navarre, from its origins until its incorporation into Castile. Pamplona, 1973.