| The subject of this article has no official name.|
It is a fan-given name as substitute for lack thereof, and should not be considered as part of the Attack on Titan universe.
In the aftermath of the 57th Exterior Scouting Mission, the Scout Regiment was summoned to the capital in order to hand Eren Jaeger over to the Military Police Brigade as per the agreement made during Eren's trial a month prior. However, Commander Erwin Smith devised a secret mission for the Scout Regiment to confront and capture Annie Leonhart, a former cadet of the 104th Cadet Corps suspected of being the Female Titan which sabotaged the 57th Expedition. This operation would commence in Stohess District, Annie's stationing as a recruit in the Military Police and the half-way point between Calaneth District and the capital.
With the identities of the Colossal Titan and the Armored Titan remaining unknown at the time, the Stohess District operation was made known to only the most trusted members of the Scouts. In order to isolate Annie from any potential accomplices, a majority of the new recruits from the 104th Cadet Corps were sent to a remote base in Wall Rose under the watch of Section Commander Miche Zacharius and his subordinates.
Sighting and evacuation
Shortly afterwards in the early morning, Section Commander Miche Zacharius detected the presence of the Titans in Wall Rose. He quickly sent out his subordinate Tomas to deliver a report of the sighting to Commander Erwin Smith in Stohess District. Tomas departed immediately as Miche's comrade Nanaba alerted the recruits of the incident. After Miche and Nanaba briefly assessed the situation, Miche's squad and the recruits set out on horseback to start an evacuation of Wall Rose.
Miche organized the soldiers present into four teams which would spread news of the invasion north, south, east, and westwards. Due to the direction of the incoming Titans, the breach was estimated to lie somewhere between Krolva District in the far west and Trost District to the far south. The south team was assigned the most soldiers in order to assess which area of Wall Rose was breached after spreading information as necessary, starting near to Trost and working westwards. The west team would do the same, investigating Wall Rose starting from Krolva and working southwards. As the teams began to disperse, the nine Titans spotted began running at an erratic pace. Miche chose to break away from the teams in order to act as a decoy, leaving command of the south team to his subordinate Gelgar.
Miche succeeded in slaying five of the nine Titans present before he encountered the Beast Titan, believing it to be an Abnormal. Before he could act, the Beast Titan caught Miche's horse and hurled it towards him, sending Miche into the mouth of a gluttonous Titan. Before Miche could be eaten, the Beast Titan began to speak with Miche. With Miche too terrified to respond, the Beast Titan chose to steal Miche's omni-directional mobility gear for inspection, leaving Miche to be devoured alive by his Titans.
Five hours after the sighting, Sasha Braus on the north team encountered a Titan in a newly established village, much farther north than it was expected the Titans would advance in that time. She succeeded in saving a young girl from a 3-meter Titan, and she afterwards encountered a group of riders led by her father spreading information to the villages of Wall Rose. Sasha remained with her father's riders rather than rejoining with the north team. Seven hours after the sighting, the west team led by Nanaba successfully spread news of the invasion to Wall Rose's western settlements and began their southward ride to search for the breach in Wall Rose.
Eight hours after the sighting, the south team succeeded in alerting Commander Dot Pyxis in Trost District of the invasion. The Garrison counter-measures unit led by Captain Hannes was sent out to assist the Scout Regiment in locating the breach in Wall Rose. The Garrison 1st Division led by Captain Kitz Woermann was also sent out to establish an eastern line of defense to prevent the spread of the Titans into Wall Rose's eastern villages.
Nine hours after the sighting, the Garrison 1st Division's line of defense was successfully established as Captain Hannes' unit continued to investigate Wall Rose. Elsewhere, Gelgar's south team came across the ruins of Ragako. Conny Springer, a recruit and former resident of the village, frantically began searching for his family. While there were no corpses or blood to be seen and all the village's horses were still tied in the stables, many houses were broken apart as if something had burst out from the inside. Furthermore, Conny discovered a Titan with underdeveloped limbs lying atop his house with no explanation as to how it got there. Lynne proposed that the citizens had safely evacuated, attempting to lessen Conny's worries, but Gelgar and the others remained suspicious of the scene. Leaving Ragako behind, Gelgar initiated the south team's investigation of Wall Rose. As Conny left the ruins of his house, the Titan spoke to him saying "Wel...come... home...".
Eleven hours after the sighting, when night had fallen over Wall Rose, the west and south teams met up alongside Wall Rose much to their surprise. Both Gelgar and Nanaba reported that no breach had been located in Wall Rose. A second investigation was proposed, but it was decided that the exhaustion of the recruits would compromise their focus, making an immediate second investigation ineffective. Instead, the south and west teams made their way to Utgard Castle nearby to rest for the night, since the Titans would not be active in the absence of sunlight.
Twelve hours after the sighting, Tomas arrived in Stohess District and warned the leaders of the Scout Regiment of the Titan invasion. The participants of the Stohess District mission immediately set out for Ehrmich District to assist in the evacuation of the citizens of Wall Rose. Section Commander Hange Zoë chose to bring Pastor Nick of the Order of the Walls with them due to his apparent knowledge of the Titan within Wall Sina that was spotted in the aftermath of the Stohess District mission. On the way to Ehrmich, Hange, Armin Arlelt, Mikasa Ackermann, and Eren discussed the possibility of using hardening power similar to Annie Leonhart's to seal the breach in Wall Maria, since the Walls and Annie's crystal were found to be made of the same substance.
Sixteen hours after the sighting, the Scout Regiment arrived in Ehrmich. Once Nick had seen firsthand the reality of a Titan invasion, Hange questioned him a second time concerning what he knows. Nick once again refused to speak, but mentioned that Christa Lenz, a new recruit of the Scout Regiments, would have the ability to learn and speak the truths about the Walls. With this information, a part of the Stohess participants led by Section Commander Hange made ready to enter the battlefield.
Before departing, Hange received background checks delivered by Sasha on Annie Leonhart as requested, discovering that she was registered as originating from the same region as Reiner Braun and Bertholdt Hoover. The connection between the three was questioned, and Armin recalled that Annie had changed her plan of attack during the 57th Scouting Mission after her encounter with Reiner, realizing that Reiner must have informed her of Eren's true position in the scouting formation. With the possibility of Reiner and Bertholdt being Annie's accomplices becoming very likely, all soldiers present agreed to remain quiet about the topic until Reiner and Bertholdt could be confronted in an underground location.
Seventeen hours after the sighting, the Stohess District mission participants under Hange's command set a course for Utgard Castle, where a proper view of Wall Rose could be established.
Upon arriving at Utgard Castle over eleven hours after the sighting, the south and west teams discovered that the castle had been inhabited by an unknown individual or group. Various supplies had been left in the castle, with labels marked in an unknown writing. The recruits discussed the events of that day, and Conny mentioned the Titan that was found in his house, noting how it resembled his mother. Reiner and Ymir dismissively called his idea stupid to bring the conversation to a halt.
As Ymir searched through the supplies left by the previous inhabitant of the castle, Lynne spotted Titans moving in the moonlight and called for all the soldiers and recruits. As they wondered at the situation, the Beast Titan passed by the castle heading for Wall Rose. Nanaba ordered the recruits, who lacked ODM gear, to remain in the castle as the soldiers engaged the Titans.
During the combat, the smaller Titans managed to break into the tower. Lynne ordered the recruits to set up barricades to prevent them from infiltrating too far into the tower. Reiner descended the castle as the others gathered barricade supplies, and he was nearly caught and eaten by a Titan until Bertholdt saved his life. The other recruits used an antique cannon to block the door, but a smaller Titan came through and nearly killed Conny. Reiner risked his life to send the Titan out of a window, injuring his arm in the process. Outside, the fighting continued as Nanaba and Gelgar killed several Titans while Lynne and Henning went to the top of the castle to check on the recruits. At that moment, the Beast Titan began hurling projectiles at the castle from atop Wall Rose, destroying the stables and killing Lynne and Henning with a boulder thrown at the top of the tower.
Twenty hours after the sighting, after many hours of combat with the Titans, Nanaba and Gelgar had run out of gas in their ODM gear and were killed by the Titans. With all commanding officers absent or deceased, the recruits of the south and west teams were left to fend for themselves. Seeing their hopeless situation, Ymir chose to fulfill a promise made to Christa Lenz a long time ago: when she chooses to publicly reveal her secret, Christa would go by her true name that she had abandoned long ago. As the sun began to rise, Ymir dove into the horde of Titans swarming around the castle and transformed into her Titan form. Ymir's Titan began to slaughter and incapacitate the Titans below, and Reiner and Bertholdt recognized Ymir's Titan as the one that ate their comrade five years ago during the fall of Wall Maria. 
Ymir's battle with the Titans began to damage the castle structure, and she chose to be overwhelmed rather than escaping and damaging the castle further. Christa gave encouraging words to Ymir, disregarding the safety of the castle for Ymir's sake. Ymir ascended the castle and told the recruits to mount her Titan's back, and Utgard Castle collapsed on top of the horde of Titans. Ymir attempted to kill the Titans as they began to escape the rubble but was soon overwhelmed, but before the Titans could kill her the Scout Regiment participants of the Stohess District mission arrived at Utgard, slaughtering the remaining Titans. Ymir was extracted from her Titan, slipping into a comatose state from her injuries, and Christa revealed to Ymir her true name Historia Reiss.
Return of the Titans
After the battle at Utgard Castle, the south team, west team, and Stohess mission participants regrouped atop Wall Rose a short distance from the ruins of the castle. Historia pleaded for Ymir's well-being despite her hidden powers, and Section Commander Hange ordered for Ymir to be sent to Trost for medical attention. Shortly afterwards, Captain Hannes and his Garrison team met with the Scouts, announcing that there was in fact no breach in Wall Rose. Hange and the other Scout Regiment leaders present discussed the implications of this news, deciding that the soldiers should head to Trost and wait on standby. At this time, Reiner chose to reveal to Eren the secret that he was the Armored Titan and that his comrade Bertholdt was the Colossal Titan. He explained that the goal of his group was to wipe out the inhabitants of the Walls, but that Eren's existence could overrule this necessity if he were to go with them to their hometown. Eren refused, and Reiner decided that the time had come for him and Bertholdt to reveal their true powers. Mikasa attempted to kill both before this could be done, but both managed to transform successfully into the Armored Titan and Colossal Titan. Bertholdt caught Ymir and another soldier in his Titan form as Eren was caught by Reiner, but Eren transformed in time and began his battle with the Armored Titan.
Mikasa aided Eren in his fight against Armored Titan as Hange commanded the Scout Regiment forces atop Wall Rose against the Colossal Titan. Having caught Ymir and another soldier, Bertholdt threw both into the mouth of his Titan. As Hange's soldiers attempted to strike at the Colossal Titan, Bertholdt unleashed an extreme burst of continuous steam from his Titan, burning those nearby and preventing their ODM gear from grappling to his Titan's skin. Hange divided the soldiers present into four teams, placing Rashad in charge of Teams 3 and 4 to flank the Colossal Titan while Lauda and Team 2 remaining in front on standby. Hange led Team 1 to assist Eren and Mikasa in the fight against Reiner.
Eren's attempts with hand-to-hand combat with Reiner proved ineffective until he utilized a tactic learned from Annie, tackling him and putting him in a lock long enough to tear off an arm of the Armored Titan. With Reiner briefly at a disadvantage, Eren regrouped with Team 1 and a new plan was made to destroy Reiner's legs in order to cripple him. Reiner shed the armor behind his knees, gaining speed and advantage over Eren for a moment. Eren grappled the Armored Titan's neck and immobilized him as Team 1 noticed Reiner's new disadvantage. Mikasa went for the opportunity and cut the muscles behind Reiner's knees, completely immobilizing him as Eren began to break the armor over Reiner's nape. With failure imminent, Reiner's Titan let out a loud cry to Bertolt, signalling a last-resort move. The Colossal Titan, still emitting steam, let itself fall from Wall Rose right on top of the brawling Titans.