As the name suggests, City Walls are a defensive mechanic for your cities, helping protect them from attacking troops. The strength of the walls depends on your city’s level. The higher the city level, the stronger its walls.
When attacking an enemy city, it’s important to consider both the troops inside, opponenmt's defense skills and the city walls. Using scouting will reveal the exact defensive value of the walls, helping you plan your attack more effectively.
⚠️ Note: The cooldown on city walls only affects the experience points gained, not their defensive strength.