They instinctively attack and eat humans on sight, but do not use them as food. The Titans are giant humanoids about 3-15 meters tall that are masculine in body shape but without reproductive organs. The sudden influx of population causes turmoil and famine. A second titan smashes clean through Wall Maria, forcing mankind to abandon the land between Wall Maria and Wall Rosé, evacuating the remaining population into the inner districts. This all changes when one day, a giant 60-meter (200 ft) tall Titan mysteriously appears and breaches the outer wall of the Shiganshina district, a town at Wall Maria, allowing smaller but still deadly Titans to infiltrate the district. Inside these walls, humanity has lived in peace for one hundred years many people growing up without ever having seen a Titan.
What remains of humanity now resides within a country surrounded by three enormous concentric walls: the outermost is Wall Maria the middle wall is Wall Rose, and the innermost is Wall Sheena. 'Over one hundred years prior to the beginning of the story, giant humanoid creatures called Titans (巨人 Kyojin) suddenly appeared and nearly wiped out humanity, devouring them without remorse or reason.
