In 732, Abdul Rahman Al Ghafiqi's troops raided Vasconia, advanced towards Bordeaux and ransacked the city. Odo engaged them but was defeated by the Umayyads near Bordeaux. Following the defeat, Odo re-organised his scattered forces, and ran north to warn Charles Martel, Mayor of the palaces of Neustria and Austrasia, of the impending threat and to appeal for assistance in fighting the Arab-Berber advance, which he received in exchange for accepting formal Frankish overlordship. The duke, aged almost 80, joined Charles Martel's troops and was to form the Frankish army's left flank, while the Umayyads and the multinational army commanded by Charles built up their forces somewhere between Vienne and Clain to the north of Poitiers in preparation for the so-called Battle of Tours (732, or possibly 733).