The Emperor, learning of Aisso’s raids in…

The Emperor, learning of Aisso’s raids in Barcelona, orders his second son, Pepin, King of Aquitaine, to take action.

A Frankish assembly at Quierzy-sur-Oise decides to send an expedition against the Córdoban caliphate but the counts in charge of the army—the brothers-in-law Hugh of Tours and Matfrid of Orléans—are slow to act.

The young count Bernard having requested and received some help from the Emperor, as well as that of some local hispani (probably Gothic noblemen), Aisso, to counter these reinforcements, had sent his brother to request help from Abd ar-Rahman II, Emir of Córdoba, the only potential ally powerful enough to threaten the Franks.

Abd ar-Rahman had sent the general Ubayd Allah Abu Marwan to Zaragoza in May 827, from whence he invades the territory of Barcelona, reaching the city itself in the summer.

He besieges it and ransacks its environs, but fails to take it.

By the time the Frankish army arrives, in late 827, Abu Marwan has already returned to Muslim territory, taking Aisso and his followers with him.

This reprieve, seen as a victory, greatly increases Bernard's prestige.