A Dream I Once Had

 is the 70th chapter of the Attack on Titan manga, written and illustrated by Hajime Isayama.

Overview
Two months after Historia's crowning, the Survey Corps now rule over the Walls with the monarchy just acting as a display. Historia opened an orphanage using the properties confiscated to the nobles for all orphans within the Walls. Eren has mastered his Titan hardening abilities and the Survey Corps are preparing a strategy to confront Reiner and Bertolt in case they return. All members of the old government have been arrested and their allies obliged to pay high taxes; their technology was confiscated and the shining Titan stones found in the Reiss chapel were given to the citizens as an infinite source of light. Hange develops a guillotine-like weapon made with Eren's Titan stone capable to kill Titans without need to fight them, though at great cost for Eren's health. The Survey Corps prepare a plan to retake Wall Maria using this new weapon. Hange reveals the results of the studies made to the Titan serum and its care is trusted to Levi. Marlo and some other members of the Military Police join the Survey Corps. Eren recalls some memories of Grisha encountering Keith Shadis after the massacre in the Reiss chapel and plans to meet with him and ask him what he knows about it. In Shiganshina District, Reiner is defeated by the Beast Titan. The human inside it emerges and orders him and Bertolt to wait for the Survey Corps so the three can ambush them when they come.

Summary
Two months after Historia's crowning, on the orphanage, Historia is chasing two kids. Eren, Armin, and Jean are talking about how Historia seems more the head of an orphanage than a queen. They talk about how Historia rounded up all the poor and the orphans in a farm and is looking after them. Historia spots them, and tells them to carry some boxes and sacks before the sun sets. Jean remarks on how she is acting like his mom while Armin remarks on Historia "the goddess". Behind them, Eren and Historia talk about his hardening training. Eren says that if he meets Reiner Braun and Bertolt Hoover, then he will kill them. Historia asks if he wants to kill them but he ignores it, repeating that he will kill them. She comments that she wants to find out soon why the world became like this, stating that she does not want to regret that she denied the power of the First King. Mikasa then comes up to them and carries Eren's sacks to the house. A flashback then ensues of how the Survey Corps sent the nobility to various prison camps and stripped them of their titles. The Survey Corps found technological innovations that was believed to have been destroyed by the Military Police Brigade. The shining stones found in the vast underground space of the Reiss family territory were given to the citizens as a source of light that consumes no energy and its use helped improve productivity. At Trost District, there are Titans