Battle of Stohess
Armin deduces that the Female Titan is Annie Leonhart, now in the Military Police. During Eren's transfer to the capital, the Survey Corps tries to capture her in Stohess. Annie transforms and her fight with Eren wrecks the district. Eren defeats her, but she encases herself in crystal; in addition, a Titan is discovered inside the Wall.
Sides
Survey Corps
Leaders: Erwin Smith, Armin Arlert, Eren Yeager, Mikasa Ackerman
104th scouts and Hange's squad
How it unfolded
The underground trap
Armin tries to lead Annie into an underground passage. She grows suspicious, refuses to enter and transforms.
Eren vs. the Female
Eren transforms and fights Annie across the city; trapped civilians die in the battle.
The escape over the Wall
Annie climbs Wall Sina, but Mikasa slices off her fingers and makes her fall. Eren defeats her and she encases herself in crystal.
A face in the Wall
In the damaged Wall, a colossal Titan appears inside the structure. Pastor Nick begs that it not be exposed to sunlight.