what is the story behind attack on titan
Attack on Titan Attack on Titan (Japanese: 進撃の巨人, Hepburn: Shingeki no Kyojin, lit. "Advancing Giant") is a Japanese manga series written and illustrated by Hajime Isayama. The series began in Kodansha's Bessatsu Shōnen Magazine on September 9, 2009, and has been collected into 26 tankōbon volumes as of August 2018. It is set in a world where humanity lives in cities surrounded by enormous walls protecting the humans from gigantic humanoids that are referred to as titans. The titans vary in height and endlessly eat humans seemingly without reason. The story initially centers on Eren Yeager and his childhood friends Mikasa Ackerman and Armin Arlert, who join the military to fight the titans after their hometown is invaded and a titan eats Eren's mother, whom he swears to avenge. As the story progresses and the truths about the titans are slowly revealed to the reader, the narrative shifts to encompass Historia Reiss, squad leader Levi, Eren's father Grisha, and other supporting characters.
Attack on Titan Over 100 years before the beginning of the story on an alternate world, giant human-shaped 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 three enormous curtain 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, sometimes 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 uneasy peace for one hundred years; many people growing up without ever having seen a Titan. This all changes when one day, a giant 60-meter (200 ft)-tall Colossus Titan mysteriously appears after a strike of lightning and breaches the outer wall of the Shiganshina district, a town at Wall Maria, allowing the smaller Titans to invade the district. An Armored Titan smashes clean through the gate in Wall Maria, forcing humankind to abandon the land between Wall Maria and Wall Rose, evacuating the remaining population into the inner districts. The sudden influx of population causes turmoil and famine.