Abd ar-Rahman II
Faced with this opposition, Aissó appealed to the sole power that could be compared to the Franks, the Emir of Córdoba. He sent a deputation, led by his brother, to request help from Abd ar-Rahman II. He sent his General, Ubayd Allah (also known as Abu Marwan), who arrived in Zaragoza in May 827. From there, his forces entered the territory of the County of Barcelona, reaching the City of Barcelona later that summer. The City was besieged without success; however, the surroundings were ransacked. The army then moved to Girona, which was attacked on October 10, 827.