The Siege of Masyaf was an invasion of the Masyaf, the stronghold of the Assassins under command of Al Mualim, conducted by the Saracen armies of Saladin, the Sultan of Egypt and Syria. Though conceived as a siege, the attack lasted only a couple of days, as Saladin was intimidated into retreat after the Assassins proved with Umar Ibn-La'Ahad that a lone agent could easily kill him in his sleep at their discretion no matter his defenses.