Shingeki No Kyojin

Shingeki no Kyojin(Attack On Titan) History

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. What remains of humanity now resides within a country surrounded by three enormous concentric walls: the outermost is Wall Maria (ウォール・マリア Wōru Maria); the middle wall is Wall Rose (ウォール・ローゼ Wōru Rōze, pronounced like rosé) and the innermost is Wall Sheena (ウォール・シーナ Wōru Shīna, alt. "Wall Sina"). Inside these walls, humanity has lived in peace for one hundred years; many people growing up without ever having seen a Titan. This all changes when one day, a gaint 60-meter (200ft) 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. 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. The sudden influx of population causes turmoil and famine.

The Titans are giant humanoids about 3-15 meters tall that are masculine in body shape but without reproductive organs. They instinctively attack and eat humans on sight, but do not use them as food. Their skin is tough and difficult to penetrate, and they regenerate quickly from injuries, except for a weak spot at the nape of their neck.
Combating the Titans is the military, which is divided into three branches. Foremost in the story is the Survey Corps (調査兵団 Chōsa Heidan), also called the Scouts, which goes out into Titan territory in order to try and reclaim the land. The Scouts are heavily derided in society because of their high casualty rate and little sense of progress. Another branch is the Garrison (駐屯兵団 Chūton Heidan), which guards the walls and the civilian populace. The third branch is the Military Police Bridgade (憲兵団 Kenpeidan), who guard the royal family and live a relatively relaxed life. The soldiers use a tethering system called Vertical Maneuvering Equipment (立体機動装置 Rittai Kidō Sōchi) which allows them to jump onto walls, trees or nearby buildings to attack Titans.