Walls

Provides extra protection for your city.

It is also the only building which is always upgraded to a higher level before the castle. At level 1, it provides 50 battle points, level 2 it provides 100 battle points, and so on to level 5, where it provides 250 battle points. However, these battle points can be reduced in effectiveness, with the tech Battering Ram, which at level 5, reduces the wall's effectiveness to 50%.