Lubb Ibn Muhammad
Muhammad's son, Lubb ibn Muhammad ibn Qasi, was born in 870, and was already active at the time of his father's death. In 896, he was refortifying Monzon when al-Tawil of Huesca tried his luck. Though being attacked by a larger, better equipped army, Lubb was able to rout al-Tawil's men, taking his brother prisoner. In January 897 he went to Toledo to take up the leadership offer the citizens had made his father. Back in the east, he launched an attack on Aura that led to the death of Wilfred of Barcelona. Returning through Toledo in 898, he next marched to Jaén, with the intent of forming a coalition with another rebel, Umar ibn Hafsun, but before Umar reached Jaén, the news of his father's death at Zaragoza forced Lubb's return to Tudela, where he formally recognized the sovereignty of the emir, Abd Allah, in exchange for the formal governorship over Tudela and Tarazona. His return north found al-Tawil moving to take advantage of the temporary power vacuum and three weeks after his father's death, Lubb captured the Huesca ruler in a skirmish. To buy his freedom, al-Tawil ceded lands between Huesca and Monzon to Lubb, and agreed to pay 100,000 gold dinares for the possession of Huesca. Paying 50,000 immediately, he gave his son Abd al-Malik and daughter Sayyida as hostages to ensure payment of the second half. Lubb would relent, forgiving the remaining debt and returning the hostages except Sayyida, who he married.
Lubb ibn Muhammad continued his father's siege of Zaragoza, but found himself drawn in other directions. Perhaps in 900, Alfonso III, in conjunction with Fortún Garcés of Pamplona, launched a raid against Tarazona, in Lubb's realm, which he successfully blocked. Then in 903, Toledo again rebelled against Córdoba, asking Lubb to take control. He sent his brother Mutarrif, who was proclaimed their lord. Mutarrif's fate is unknown, but by 906, he had been replaced by Lubb's kinsman Muhammed ibn Isma‘il, son of Isma‘il ibn Musa, who was then assassinated. Alfonso again attacked Lubb's lands, laying siege to Grañón, but was forced to lift the siege when Lubb moved with an army toward Alava. This threat neutralized, Lubb turned toward Pallars, ravaging the lands, killing hundreds and taking a thousand captives, including Isarno, Count Raymond's son, who was kept in Tudela for a decade before being freed.
In 905, a coalition of the King of Asturias, the counts of Aragon and Pallars, and, it is sometimes claimed, Lubb ibn Muhammad, engineered a coup in Navarre that brought Sancho Garcés to the throne in place of Fortún Garcés. Two years later, Lubb launched an attack on Pamplona and fought at "Liédena" on 30 September 907, resulting in a total rout of the Banu Qasi forces, while Lubb was killed. The transcendent battle marked a permanent change in the regional balance, Sancho's Pamplona becoming a major regional power, while it initiated the final decline of the Banu Qasi.
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