On that day, mankind received a grim reminder. We lived in fear of the titans, and were disgraced to live in these cages we called walls.

Year: 847

Around 107 years ago, Giant humanoid beings called Titans appeared and started eating off Humanity, they are to this day very unknown, very little is known about them, but they driven Humanity to the brink of destruction where now they are guarded by three walls, The Walls are Maria, Rose, and Sina, the walls protected Humanity from the Titans for one hundred years and lived in peace from the Human-Eating Titans.

Just a note:
THERE IS NO KNOWN HUMAN LIFE OUTSIDE THE WALLS.
(so far in the story, that is)
(Its not much, Work in Progress)