How a trap in a desert town ended the Seventh Crusade's ambitions in Egypt
In 1250, King Louis IX of France led the Seventh Crusade into Egypt, aiming to dismantle the Ayyubid dynasty and reclaim Jerusalem. Instead, his forces were lured into a lethal urban trap at Mansurah, marking a turning point where Mamluk commanders rose to power and the Crusade collapsed in disaster.
By the mid-13th century, Crusaders viewed Egypt as the primary obstacle to their goal of capturing Jerusalem, which had been lost in 1244. Backed by Pope Innocent IV at the First Council of Lyon in 1245, Louis IX launched the Seventh Crusade. The strategy relied on a pincer movement, with Crusaders attacking from the west while hoping for Mongol support from the east. However, the Great Khan Güyük rebuffed these overtures, demanding submission from European leaders instead.
The campaign began with the occupation of Damietta in June 1249, following a chaotic retreat by the Ayyubid garrison. Emboldened by the death of Sultan as-Salih Ayyub, the Crusaders marched toward Cairo. Shajar al-Durr, the Sultan's widow, managed the crisis by concealing the death while summoning the heir, Turanshah. As the Crusaders approached the canal of Ashmum, a local guide revealed a crossing point. Robert of Artois led a surprise assault on the Egyptian camp at Gideila, pushing toward the royal palace in Mansurah.
The battle shifted when Mamluk commanders—Qutuz, Faris ad-Din Aktai, and Baibars—took control. Baibars executed a tactical masterstroke by opening the town gates, drawing the Crusaders into a confined urban space where they were besieged by both soldiers and the local population. The slaughter was near-total; Robert of Artois and William of Salisbury were killed, and only five Knights Templar survived. This engagement marked the first time Mamluks operated as supreme commanders in Egypt.
Following the defeat at Mansurah, Louis IX attempted to negotiate a trade of Damietta for Jerusalem, but the Egyptians refused. Struck by disease and retreating toward Damietta, the remaining Crusader forces were annihilated at the Battle of Fariskur in April 1250, where Louis IX was captured. While false reports of a French victory circulated in Europe, the reality of the defeat eventually triggered the Shepherds' Crusade movement in France.
Source: Battle of Mansurah (1250)
