sentences:  When the news of the sack of Aleppo reached an-Nasir Yusuf, he and his army fled towards Gaza on January 31, stopping at Nablus for several days and leaving a contingent which may have been intended as a rearguard.Damascus fell to the hands of the Mongols, under general Kitbuqa, 16 days after the sack of Aleppo.The Emirs of Damascus surrendered without resistance.