Still expecting the emperor's imminent arrival, in July 1221, the crusaders set off towards Cairo, but they were stopped by the rising Nile, which al-Kamil allowed to flood by breaking the dams along its course.
虽然还期待着皇帝能很快到来，1221年七月，十字军向开罗开拔了，但他们却被上涨的尼罗河水挡住了去路，是阿尔-卡米尔通过破坏沿河的堤坝制造了洪水。