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Across the sea, the nation of Marley finishes its fight with the Mid-East Allied Forces using the Power of the Titans. However, it becomes all too clear to the Marley military that the power of the Titans is losing its place in the modern age. In order to maintain its hold on the world, the power of the Founding Titan is needed now more than ever. Unfortunately for the warriors, the Founder still rests in the hands of Eren Yeager and the last remnants of Eldia, the devils of Paradis whom Reiner Braun will soon have to confront once more.
|91|| The Other Side of the Ocean|
(海の向こう側 Umi no Mukougawa?)
|March 8, 2017|
| Four years after the battle of Shiganshina District, the Warriors of Marley besiege Fort Slava of the Mid-East Allied Forces. Falco, a Warrior cadet, is saved by his brother Colt who returns him to the trenches nearby. As his comrades patch Falco up and remind him of their goal in the battle, Colt reports the situation to Marleyan Commander Magath. He suggests sending their Titans Porco Galliard and Pieck to attack, but the presence of the anti-Titan artillery prevents this strategy.
Cadet Gabi offers to destroy the armored train carrying the artillery, and the commander reluctantly agrees. Gabi approaches the bunker in plainclothes while secretly carrying a bundle of grenades. When the train approaches, she collapses to the ground and throws the bombs on the tracks, putting the weapon out of commission. As she returns to the trenches, Galliard transforms into his Titan and shields the Warrior cadets from machine gun fire before charging the bunkers and wiping out the Allies' defenses.
|92|| Marley's Soldiers|
(マーレの戦士 Māre no Senshi?)
|April 8, 2017|
| Above Fort Slava, Marley prepares an airstrike as Porco Galliard's Jaw Titan and Pieck's Cart Titan lead the 800-Warrior unit in a charge against the Mid-East Allied Forces. Falco attempts to save an Allied soldier's life, though the soldier is ungrateful and disgusted towards the Eldians. As Commander Magath and Colt survey the situation, the signal is given for the Marley zeppelin to begin the next phase of the attack. From above, Zeke transforms parachuting Eldian captives into Titans with his Titan power, creating a devastating airstrike. The Warrior cadets look on as Titans begin eating the soldiers.
Reiner Braun joins the battle as the Armored Titan, destroying the remaining anti-Titan artillery as Galliard assists. Once the coast is clear, Zeke joins the ground forces as the Beast Titan and uses leftover artillery in the fortress to destroy the Mid-East naval fleet stationed in the nearby bay. The fleet is destroyed, but artillery fire from the ships heavily damages the Armored Titan. A peace treaty between Marley and the Mid-East is later signed, but the outcome of the battle reminded Marley of the growing need to acquire the Founding Titan.
|93|| Midnight Train|
(闇夜の列車 Yamiyo no Ressha?)
|May 8, 2017|
| After the surrender of the Mid-East Allied Forces, an outraged general demands answers concerning the world's slander against Marley's Titans. Magath explains that the modern age is leaving the Power of the Titans obsolete, and Marley's inferior technology leaves them at a disadvantage. Zeke proposes that Marley must acquire the Founding Titan as soon as possible to gain full mastery over the Titans while also focusing on improving conventional weaponry. The general takes Zeke's advice and the meeting concludes. Afterwards, Colt marvels at Zeke's influence in Marleyan matters and wonders at how Zeke is able to use his spinal fluid to create and control Titans despite not having royal blood. As Zeke suggests Colt will inherit a secret upon receiving Zeke's Beast Titan, Magath arrives to congratulate Zeke on his meeting conduct. He reveals to Zeke that in the past three years, many scouting ships sent to Paradis have gone missing. Zeke believes it may be the doing of Eren's
Reiner awakens from a nightmare elsewhere with Porco Galliard at his side. Galliard is cold towards him, feeling that Reiner was responsible for his brother Marcel Galliard's death. He says that when he inherited the Jaw Titan from Ymir, he could see her memories but not Marcel's. Pieck arrives and tells Galliard to go easy on Reiner, whom she tells to meet with the Warrior cadets. Reiner leaves to meet the cadets on the dock, who are watching traumatized Allied soldiers get sent away as a reminder of the Eldians' demonic nature. The children are excited to see Reiner, who sees his old comrades in the faces of the cadets, and together they walk around the town. Afterwards, the Marley soldiers take a train back to their homeland. Colt praises Gabi for her heroic deeds during the battle at Fort Slava, and Falco is bitter to see she will likely inherit the Armored Titan and die an early death. Reiner demands for Falco to correct his views on the power of the Titans, and Falco quickly apologizes. Reiner suggests that if Falco wants to save Gabi, he must work hard to surpass her and inherit the Armored Titan in her place.
|94|| The Boy Inside the Walls|
(壁の中の少年 Kabe no Naka no Shōnen?)
|June 8, 2017|
| The Warriors return at long last to their hometown, reuniting with their families. At the Braun family residence, Gabi's heroism is praised and Reiner tells of the horrors he experienced living among the devils of the island.
Later that day, Reiner recalls his youth when he trained as a Warrior so that his Eldian mother and Marleyan father could live together. Faced with many struggles and shortcomings, Reiner's dream kept his resolve alive.
|July 7, 2017|
| While Gabi and the Warrior cadets train, Zeke and his fellow Titans discuss Eldia's situation, and Zeke informs them that the Tybur family will use their status order to boost Eldia's reputation in the eyes of the world when the time comes to attack Paradis once again.
Afterwards, Reiner recalls his final days in Warrior training when he, Bertolt, Annie, and Marcel were sent to Paradis to reclaim the Founding Titan. On their journey, Reiner learned that Marcel set up Reiner to inherit the Armored Titan instead of his brother. Reiner's shock was worsened when shortly afterwards, a Titan consumed Marcel.
|96|| The Door of Hope|
(希望の扉 Kibō no Tobira?)
|August 8, 2017|
| The Warriors lost hope for their mission after Marcel's death, but Reiner's determination to live and succeed spurred his comrades on. Arriving at Wall Maria, the Warriors began their attack.
Two years later, Annie emphasized their need to retrieve the Founding Titan urgently, but Reiner was convinced that a slow and steady approach would be best for humanity's sake. Planning to enter the Military Police Brigade to enter the interior, the Warriors joined the 104th Training Corps.
|97|| From One Hand to Another|
(手から手へ Te kara Te e?)
|September 8, 2017|
| Following a close encounter between Annie and an elusive MP, the Warriors decided to breach Wall Rose after their Training Corps graduation to make new progress. Recalling his past, Reiner nearly takes his own life, but decides otherwise after remembering the importance of his role in the new Warrior cadets' lives. Falco is worried that he will not inherit the Armor, but a wounded soldier named Mister Kruger assures him that it is best for him to live a long life.
After the unexpected arrival of the Tyburs, Magath speaks with Willy Tybur, head of the family, and learns of the Tyburs' role as the true leaders of Marley. Worried about the fate of Marley and Eldia, Willy plans to reveal the truth to the world at the coming festival. Meanwhile, Falco delivers a letter from Mister Kruger.
|98|| Good to See|
(よかったな Yokatta Na?)
|October 6th, 2017|
| Following a military meeting one month after the war, the Warriors watch the cadets finish a training run, after which Falco admits to Gabi that he has been trying to outrank her for her sake. The cadets later visit the site of Willy Tybur's upcoming stage in Liberio, and nearby Tybur converses with Magath concerning the fate of Marley. In a nearby hospital, Kruger meets Grisha's father.
On the eve of the Liberio festival, Willy announces that he will reveal his plan to solve the Titan problem tomorrow night. The cadets enjoy the festival the next day, and before Willy's announcement Falco leads Reiner aside to meet Kruger. Reiner recognizes Kruger as Eren Yeager in disguise, who is glad to see Reiner has made it home.
|99|| Guilty Shadow|
(疾しき影 Yamashiki Kage?)
|November 8th, 2017|
| Reiner is shocked by Eren's presence in Marley, and begins breaking down after Eren indirectly threatens the civilians watching the festival above. Falco is instructed to stay in the room. Lord Tybur finishes his preparations, as crowds take their seats. The presentation begins, and an apparent Marleyan soldier summons the Warriors on behalf of Magath.
Reiner questions Eren on why he came to Marley. Then they begin to listen to Willy's speech, where he recounts the understood history of the world. Eren and Reiner continue talking, and Pieck and Porco are led into a room, where a trap door is pulled underneath them. Falco realizes Eren is from Paradis, whilst Willy declares that the known history is a lie. He explains it was King Fritz who saved the world, and never actually posed a threat. He expands though, that Karl Fritz' power has been stolen, and a rebel resisting world peace had appeared: Eren Yeager.
|100|| Declaration of War|
(宣戦布告 Sensen Fukoku?)
|December 8th, 2017|
| Before the festival in Liberio, Willy Tybur and Theo Magath suspect their enemies are already hidden within Marley. Willy intends to use the festival to draw them out by using himself as bait. Magath is concerned that he will be unable to protect Willy, but Willy emphasizes the importance of having the Eldians of the internment zone become tragic victims, including himself.
In the present, Willy continues his story about how the Tyburs sided with Karl Fritz and sold out the other Eldians to Marley. Meanwhile, Magath is informed about the disappearance of the Warriors and deploys a search party. As Willy warns of the danger posed by Eren Yeager and the Colossus Titans contained inside the Walls of Paradis, Eren tells Reiner Braun that he now understands what Reiner went through while living with the enemy, but Reiner does not want any excuses and accepts responsibility for what he did. Eren offers him a hand, but as Willy calls on the nations of the world to join his fight, Eren transforms into the Attack Titan. He emerges from the building behind Willy and then crushes him with his hand.