The Battle of Toulouse (721) was a victory of an Aquitanian Christian army led by Odo the Great, Duke of Aquitaine over an Umayyad Muslim army besieging the city of Toulouse, led by al-Samh ibn Malik al-Khawlani, the Umayyad wāli (governor-general) of al-Andalus. The decisive Aquitanian victory checked the spread of Umayyad control westward from Narbonne into Aquitaine.