The Frankish Army Under Charles Martel That Stopped the Umayyad Northward Advance at Poitiers in October 732 Without Pursuing the Defeated Force

By 732 CE the Umayyad Caliphate controlled a contiguous territory from the Indus to the Atlantic, including most of the Iberian Peninsula since the 711 conquest of Visigothic Hispania. The Umayyad governor of al-Andalus (Iberia), Abd al-Rahman al-Ghafiqi, conducted a raiding expedition northward into Aquitaine in summer 732.

The raid was probably intended as a large reconnaissance and plunder operation rather than a serious territorial conquest. Estimates of the Umayyad force vary widely between contemporary and modern sources; the most defensible modern estimate is approximately 20,000-30,000 cavalry. The army defeated the Aquitanian forces of Duke Odo of Aquitaine at the Battle of the Garonne in June 732, then advanced north up the old Roman road through Bordeaux toward the wealthy abbey of Saint-Martin at Tours.

Odo appealed to Charles Martel, the Frankish maior domus (“mayor of the palace”) who was the effective ruler of the northern Frankish kingdom. The appeal had political cost — Odo and Martel had been hostile for over a decade — but the alternative was the loss of Aquitaine. Martel agreed in exchange for Odo’s renewed acknowledgement of Frankish overlordship.

The battle

The two armies met on a date in October 732 — the exact day is disputed; the most-cited candidates are 10 October and 25 October. The battle site was south of Tours and north of Poitiers, on a wooded plateau that the contemporary Latin sources call campus martius without precise localisation. Modern French archaeology has not securely identified the site.

Martel’s army was predominantly infantry, organised in a dense square formation with overlapping shields and long spears. The Umayyad force was predominantly light and heavy cavalry. The tactical question of the day was whether the Umayyad cavalry could break the Frankish square.

The square held through repeated Umayyad cavalry charges across the afternoon. Casualties on both sides were heavy but the Frankish formation did not break. Late in the day, contemporary Frankish accounts record, a rumour spread through the Umayyad camp that the Frankish auxiliary forces — Odo’s Aquitanians — were attacking the Umayyad baggage train at the rear. A significant portion of the Umayyad force broke away from the main battle to defend the baggage. The Umayyad cavalry charge was now smaller and disorganised.

In the late-day fighting al-Ghafiqi was killed. The exact circumstances are not recorded; the contemporary sources say only that he fell during one of the late afternoon charges. With the senior commander dead, the Umayyad command structure failed. The army withdrew south overnight without organised pursuit.

Martel chose not to follow the next morning. He returned to his northern kingdom. The Umayyad force regrouped on the Spanish side of the Pyrenees and conducted further raids into Provence and Septimania over the following years, but no further major northward expedition was attempted.

Whether it was decisive

The 19th-century European historical consensus — most prominently Edward Gibbon in the Decline and Fall of the Roman Empire (volume 5, 1788) — treated the Battle of Tours as one of the decisive battles of world history. Gibbon’s famous formulation was that, but for Martel’s victory, “the Koran would now be taught in the schools of Oxford” and Western Christianity might have collapsed. The Gibbonian reading was for two centuries the standard Anglo-American account.

Modern scholarship is more cautious. The Umayyad force at Tours was smaller than Gibbon imagined. The strategic objective was probably a raid, not a conquest. The Umayyad caliphate was about to enter its own structural collapse — the Abbasid Revolution would overthrow the Damascus-based Umayyad caliphate in 750 CE — which would have ended any plausible large-scale northward expansion from al-Andalus regardless of the Tours outcome. The 1955 work of Henri Pirenne and the 1992 reassessment by Bernard Lewis both placed the battle’s geopolitical significance well below the Gibbonian framing.

The intermediate modern position — David Nicolle’s 2008 Poitiers AD 732 is representative — is that Tours mattered, but at the strategic level of a frontier-stabilisation event rather than a civilisation-saving turning point. The Umayyad raid had been intended to extract treasure and reconnoitre. Its failure made future similar raids less likely. The cultural-religious-civilisational reading is at least partly retrospective Christian self-mythology.

What it gave to Martel

Charles Martel’s victory at Tours elevated his personal political standing. He used the post-Tours legitimacy to consolidate the Frankish kingdom and to expand Frankish control into southern France over the subsequent decade. His son Pippin the Short would depose the last Merovingian king in 751 with papal approval, founding the Carolingian dynasty named after Charles Martel. The dynasty culminated in the imperial coronation of Charlemagne in 800 — almost exactly the period that the Umayyad caliphate, the original opponent at Tours, was collapsing.

Whether the Battle of Tours saved Christianity is a question the historical record cannot answer. Whether it was the foundation of the Carolingian political order that Charlemagne would inherit is not in dispute.