Battle of Shiganshina District

The was a conflict between the Survey Corps and the warriors of Marley within the ruins of Shiganshina District, in which Wall Maria was reclaimed five years after its fall and the truth of the outside world was discovered in the basement of Grisha Yeager's home.

Prelude
The Survey Corps marched during the night so that they reached

Early conflict & The Armored Titan
The Survey Corps arrived at Shiganshina, and quickly secured the area while cloaked to prevent the Warriors from discovering Eren. Armin found that the Warriors has just left the camp on the wall in a very short time. As per Armin's instruction, they managed to force Reiner Braun, who is hiding in the wall to appear and Levi Ackerman forced him into the Armored Titan in the last second. It is revealed that the stable on the inner gate is destroyed and they are trapped. In Reiner's Imp\age, The only hope is for Eren Yaegar to escape back to Wall Rose.

After all the chaos plunged in the ruin of Shiganshina, However, Bertolt Hoover the Colossus Titan is nowhere to be found.

The Colossus Titan
It is revealed that Bertolt Hoover is stationed in a Rum bucket, and is thrown by the Beast Titan to Squash up the city below it.

Armin decided to sacrifice himself to let Eren defeat the Collussus Titan, in which the operaton suceeded.

The Beast Titan
On the other side, Erwin Smith ordered everyone to a suicidal charge to open a gap for levi to secretly take care of the Titan surrounding.

Aftermath
The Survey Corps Member, fighting the Beast Titan became annihilated. Reiner Braun escaped along with Zeke. Bertolt Hoover, however, lost his Titan Power and life to Armin Artlet, who became the new Colussus Titan.