When Alexander marched southwards from Tyre, he met with resistance at one place only, the old Philistine city of Gaza, the last great coast-town before the Egyptian frontier, a strong fortress on an eminence, which was bravely and skilfully defended by the eunuch Batis with the help of Nabatean mercenaries. Not until the heavy siege-engines had been fetched from Tyre and placed upon an artificial rampart and the walls had been undermined, did he succeed in taking the city after a two months’ siege. In the course of it he was wounded by a shot in the shoulder. As a clean sweep had been made of the population partly by death and partly by enslavement, Alexander fetched in new settlers from the neighborhood, and converted the town into a Macedonian fortress.
–Ulrich Wilcken, Alexander the Great, p. 112