The Philistine cities farther south along the Mediterranean coast would observe Tyre"s fate and fear, especially Ekron, the northernmost of the four cities mentioned. The fifth city of the Philistine pentapolis, Gath, had lost all significance by Zechariah"s time, which probably explains its omission here (cf. 2 Chronicles 26:6). God would also destroy these cities and populate them with a mixed group of citizens. Thus He would humble the pride of the Philistines. This too happened when Alexander swept south. [1][source]