What is notable about the Early Bronze sites is their fortification system. Walls surrounding the sites, some three to four meters thick, with horseshoe-shaped towers, were seen at Arad, Taanach, Ai, Jericho, Yarmuth, and Megiddo (Stratum XVIII). In the latter part of EB II and EB III, the walls tended to thicken and to be strengthened, some reaching seven or eight meters in width. Now elongated, rectangular towers also begin to appear at points where the fortifications were the weakest along with earthwork glacis (an artificial solid steep slope) composed of layers of dirt and crushed lime, to strengthen the foundations of the city wall and to prevent easy access to the wall by the enemy’s siege equipment.
- Many thanks my dear brother.