Chapter 123: Island Devils

In a flashback, the Survey Corps visits Marley for the first time and learns about the state of the world; Eren notices the injustices suffered by Eldians and refugees, and meets the boy Ramzi. Hange's hope of finding allies is dashed when the "Association to Protect the Subjects of Ymir" makes clear that the island's Eldians are still hated, and Eren leaves the group. In the present, Eren has unleashed all the Wall Titans, and Armin realizes there are far more than needed to repel the invasion. Using the Founder's power, Eren announces to all Subjects of Ymir that he will exterminate all life outside Paradis to protect his people.