The manga series 'Attack on Titan' by Hajime Isayama started serialization in Kodansha's Bessatsu Shōnen Magazine.
The first season of the 'Attack on Titan' anime television series premiered in Japan.
The concluding chapter of the 'Attack on Titan' manga was released, ending the story.
The final season of the anime adaptation began airing.
King Fritz establishes the three concentric walls: Maria, Rose, and Sina, to protect humanity from Titans.
Colossal Titan and Armored Titan breach Wall Maria, leading to a massive Titan invasion and displacement of many humans.
After witnessing the fall of Wall Maria and the death of his mother, Eren enlists in the military and later joins the Survey Corps.
Eren demonstrates his power to transform into a Titan for the first time and helps seal the breach in Wall Rose at Trost.
Survey Corps conducts a large expedition beyond Wall Rose to explore the outside world and discover truths about Titans.
It is revealed that some humans can transform into Titans, including Reiner Braun and Bertholdt Hoover as enemies within.
Eren and Survey Corps fight to retake Wall Maria and uncover the secrets in the basement of Eren’s childhood home.
Eren and his friends discover Grisha Yeager’s basement which contains books revealing the history of the world, Marley, and the origin of Titans.
Eren launches an attack on Marley, escalating the conflict between Eldians within the Walls and the Marleyan nation.
Eren activates the Founding Titan’s power, causing the colossal Wall Titans to awaken and march to destroy much of the world outside the Walls.
