Walls

Overview
Walls are a type of your base upgrade along with Archers, Ballista Towers and later Catapults. Walls protect the base from intruders - enemy waves. The higher the level of wall the the more HP your city has. Sometimes when you upgrade your walls you get a tower or catapult. Walls look better with each upgrade. For Example: the level 1 wall looks like a dinky fence. Upgrading your walls helps your [ [:Category:Troops|]] fight the incoming waves of attackers. If invaders break past the walls you will lose in a single player wave. When conquering other checkpoints on the world map try to go for the walls.

Enemy waves
The waves you'll fight consist of the following enemies:

wave 1 -100 Italian units

wave 101 - 350 Barbarian units

wave 351 - 800 Iberian units

wave 800+ Carthaginian units

Defensive installations
Levelling up the wall also unlocks the following features:

level 3 - the 1st ballista

level 13 - the 2nd ballista

level 23 - the 1st catapult

level 33 - the 3rd ballista

level 69 - the 4th ballista

level 79 - the 2nd catapult

level 89 - the 5th ballista

level 149 - the 6th ballista

Maximum levels
Wall: 175

Archers: 100

Towers: 100

Catapults: 100