Ubayd Allah (Arabic: عبيد الله), known as Abu Marwan (Arabic: أبو مروان), was a general in the service of Emir Abd ar-Rahman II of Córdoba.
In 826, Aissó revolted and requested help from Abd ar-Rahman, who sent the general Abu Marwan.
[1] It besieged Barcelona without success, ransacking the city's environs.
Abu Marwan then moved on to Girona, which he attempted to occupy on October 10, 827.
[2][3] The Emperor Louis the Pious, knowing of the Muslim raid, ordered his son Pepin I of Aquitaine and the counts Hugh of Tours and Matfrid of Orléans to recruit an army, but the recruitment was slow and by the time it was formed, Abu Marwan and his army had returned to Muslim territory.