Walls

The Walls exist since more than a century ago. The humans started to become extinct at the hand of the Titans. Due to this the humans made huge walls to protect their last stronghold. The walls reach about 50 meteres in height. The tops of the walls are lined with cannons, which can fire on approaching Titans.

Because the walls are too long for humanity to guard their entire lengths, each has four towns on their edges. Because Titans are drawn towards large concentrations of people, they focus their attacks on these towns, and humanity's defenses can be focused there.

The interior of the walls seem to contain numerous dormant Titans. It has been suggested that the walls were originally created by Titans using their hardening ability.

Wall Maria
Wall Maria is the most outer wall of the kingdom. It was breached 5 years before the current storyline by the Colossal Titan.

Towns along the edge of Wall Maria include Shiganshina District.

Wall Rose
Wall Rose is the second most outer wall. It is thought to have been breached when Titans appear within the wall in Warrior's Dance, but investigation reveals there are no cracks in the wall.

Towns along the edge of Wall Rose include Chlorba District, Karanese District, and Trost District.

Wall Sina
Wall Sina is the internal wall and the last wall to protect the kingdom.

Towns along the edge of Wall Sina include Hermiha District, Stohess District, and Yalkell District.