The fortress of Ascalon, a vital stronghold along the coastal route to Jerusalem, was surrendered by the Fatimid Caliphate to Crusader forces under the command of King Baldwin III of Jerusalem in August 1153. This event followed a protracted siege that showcased the military prowess of the Crusaders, particularly the heavily armed contingents of the Knights Templar and the Knights Hospitaller. The stronghold had strategic importance due to its position, commanding control over key trade routes and serving as a defensive bastion against incursions from both Christian and Muslim forces.

Baldwin III's campaign aimed to solidify Crusader control over the region and expand the Kingdom of Jerusalem's influence. The collaboration between the various military orders highlighted the alliances formed among the Crusaders, particularly as they pushed deeper into territories held by the Fatimids. The siege was marked by several tactical assaults and a demonstrated commitment to achieving their objectives. The fall of Ascalon was celebrated by the Crusaders as it substantially weakened Fatimid defenses along the coast.

Following the surrender, the new Crusader possession of Ascalon allowed for greater movement and supply lines, facilitating further military campaigns in the surrounding areas. This victory not only elevated the standing of Baldwin III within the European Crusader community but also instilled newfound confidence in his leadership. Meanwhile, for the Fatimids, the loss of Ascalon indicated the growing threat posed by the Crusaders and the need to reassess their military strategy in the region.