The army brought by the emperor and his reputation in the Muslim world were enough to recover Jerusalem, Bethlehem, Nazareth and several strongholds without fighting, as signed by a treaty with the Ayyubid Sultan al-Kamil.

However, Jerusalem did not remain in the hands of Christians for long, as, despite further territorial gains a few years earlier in the Barons' Crusade, the latter did not control the surroundings of the city sufficiently to be able to ensure an effective defense.

The Khwarazmians plundered the Armenian Quarter, where they decimated the Christian population and drove out the Jews.

On 23 August, the Tower of David surrendered to the Khwarazmian forces and some 6,000 Christian men, women, and children marched out of Jerusalem [4] where they were massacred even after a promise of safe passage, only 300 would escape to Jaffa.

[6] Moreover, the events encouraged the king of France Louis IX to organize the Seventh Crusade.