[7] According to Mariano Torrente [es], it was revenge for the military incursions sent by the Emir of Córdoba against the Kingdom of Asturias after the Battle of Lutos.

[3] Alfonso II of Asturias, since he had an alliance with the Frankish Kingdom, decided to invade the western part of the peninsula to distract the Moorish forces, already broken by their civil war.

[8] He crossed the Duero, reached the Tagus and, after some resistance, captured and sacked the city.

[7] After the sacking, Alfonso II sent to Charlemagne coats of mail, mules, Moorish captives and a tent from a Saracen chief.

[12][13] Lisbon may had remained abandoned for a decade until Tumlus started a rebellion and was executed by the Caliphate of Córdoba in 808.