Excerpts from Books and Wikipedia
"This left Shirkuh in control of Egypt. He paid nominal homage to the Fatimid caliph Al-Adid, now barely twenty and completely powerless in affairs of state, but for all practical purposes Shirkuh had added Egypt to Nur ad-Din’s empire. Two months later, Shirkuh died after overeating fat meat at a banquet; his move from soldier to ruler had happened at the very last moment of his life. His nephew Saladin took his place as administrator of Egypt. Seven months later, the Crusader-Byzantine army returned to lay siege to the port city of Damietta, 120 miles north of Cairo. . . . After fifty days, the Christians gave up and went home, blaming one another for the loss. Once again, crusade had failed. . . . The Fatimid caliphate, which had ruled in North Africa since 909, was done; and although Nur ad-Din now claimed Egypt, Saladin was its true ruler. [Bauer: Renaissance World, p. 106]