A homeless girl from beyond the Walls is also given the name Ymir by the leader of the Cult of Ymir in 780. She joins the cult and becomes a figure of worship until 785, when they are all rounded up and turned into the Pure Titans that roam the wilderness. Meanwhile, Paradis establishes three military branches inside the walls: the Military Police, Garrison Regiment for internal security, and the Survey Corps, also known as the Scout Regiment, who fight Titans beyond the borders.
Grisha Jaeger is born in Liberio in 806. His younger sister is tortured to death by Marley Public Security. In 824, Grisha joins the Restorationists, a group that wants to bring Eldia back to supremacy. He has one biological son, Zeke, with Dina Fritz in 825.
Marley starts the Warriors program, where Eldian children are trained to operate the seven Marley Titans. Grisha sends Zeke to join the Warriors as a spy in 832, but Zeke turns all the Restorationists in instead. They are all transformed into Pure Titans except for Grisha, who receives the Attack Titan in the confusion.
In 835, Eren Jaeger is born to Grisha and his new wife Carla in Shiganshina. Also around this time, Eren’s half-brother, Zeke, inherits a Titan along with his fellow Warriors. In 844, a young Mikasa Ackerman is saved from slavers by Eren Jaeger, who kills two of the men attempting to capture Mikasa. However, Mikasa manages to kill the third and joins the Jaeger family. When the Warriors arrive to take over Paradis, the Pure Titan who was once Ymir eats one of their Titans, regaining her human form.