 While the Crusade raged, the Caliph successfully defended Baghdad against Muhammad II of Seljuq in the Siege of Baghdad (1157).The Sultan and the Caliph dispatched men in response to Zengi's appeal, but neither the Seljuqs, nor the Caliph, nor their Amirs, dared resist the Crusaders.The next caliph, Al-Mustanjid, saw Saladin extinguish the Fatimid dynasty after 260 years, and thus the Abbasids again prevailed.