|More walls? I'm sick and tired...of walls.|
|— Reiner Braun, reflecting on his time in Paradis as he transforms|
Marley besieges Fort Slava, aiming to end their four-year conflict with the Mid-East Allied Forces sparked by their defeat in Shiganshina. Warrior candidate Falco Grice is saved by his brother Colt, who returns him to the trenches nearby. The presence of an armored train prevents Marley from deploying its Titans. Warrior candidate Gabi Braun is approved to destroy it by Marleyan Commander Magath, which she succeeds in through the use of perfidy.
The deployment of Galliard and Pieck clears the Mid-East trenches, which allows their airborne operation to begin. Zeke Jaeger uses his Titan power to transform Eldians into Pure Titans, creating a powerful airstrike. The Armored Titan joins the battle, destroying the remaining anti-Titan artillery with the Jaw. With the fort secure, Zeke uses his Beast Titan's pitching to sink the naval fleet stationed nearby, however, artillery fire from the ships heavily damages the Armored Titan. A peace treaty is signed, but the battle's outcome reminds Marley of the growing need to acquire the Founding Titan.
It is the year 854, and Marley has been at war with the Mid-East Allied Forces for four years, and as a result, has been forced to put its mission to retrieve the Founding Titan from Paradis Island on hold. The Marley fighting force consists mostly of Eldians under the command of Marleyan officers. To finally win the war, Marley's forces intend to capture Fort Slava, which will allow them to invade the port where the Mid-East Allied Forces' fleet is currently residing, and destroy it.
A young soldier named Falco is injured on the battlefield and has to be carried to safety by his brother Colt. Arriving in the safety of a nearby trench, Falco's comrades begin giving him first aid as Colt reports to his superior, Commander Magath. Colt reports that digging another trench will be impossible due to the artillery fire, but his superior is unwilling to listen to him.
As the delirious Falco receives medical attention, one of his fellow soldiers, Gabi, reminds him of their mission to capture Fort Slava. Falco asks why they, as candidates, are fighting on the front lines, and Gabi explains that they are being tested to see who will become the next Warrior. The battle is being used to determine who will inherit Reiner Braun's Armored Titan. Fellow candidates Udo and Zofia muse that Gabi will most likely be chosen, due to her high scores, but Gabi insists that her scores are not the reason why she will be chosen. She will be chosen because she is determined to exterminate the evil Eldians living on Paradis Island, and prove that the Eldians living in Marley are good ones, whom she desires to free from the Liberio internment zone.
Colt informs Magath that the soldiers will not have the power to destroy the fort's rail tracks, and that if they do not move soon, they will be wiped out by artillery fire. Magath asks Colt if he has any ideas, to which he suggests releasing their two Warriors Galliard and Pieck, the Jaw Titan and Cart Titan respectively. Magath rejects the idea, not willing to risk using two Warriors yet. As the two are discussing, Koslow informs them that the fort is bringing out the Mid-East Allied Forces' new weapon mounted on an armored train: the anti-Titan artillery, a 150mm-shell cannon that can kill any Titan, including one of the nine original Titans, with a single shot.
Colt argues that Galliard and Pieck's Titans are fast enough to evade any shots, but Magath, unwilling to risk losing more Titans after the loss of the Colossal and the Female Titans, orders the 800-man Eldian unit to prepare to fight. Colt tries to protest, but Magath stops him, reminding him that he will need to change his attitude if he hopes to inherit the Beast Titan. The traumatized Eldian unit are prepped to rush the enemy trenches, to blow up the armored train.
As the armored train begins to move closer to their position, Gabi asks Magath to allow her to destroy the artillery herself. Although Magath is reluctant at first, Gabi convinces him to allow her to try out her plan. As part of her plan, Gabi takes off her uniform and armband before leaving the trench in plain clothes.
As Gabi approaches the Fort, two Allied soldiers spot her, but fail to notice the small bomb she has tied to her ankle. Afraid that Gabi might be an Eldian with the power of the Titans, the Mid-East soldiers hesitantly prepare to shoot her, but are surprised to see her collapse on the ground. Gabi waits for the anti-Titan artillery on the armored train to draw closer before throwing her bomb onto its tracks, derailing it. Enraged, one of the soldiers begins firing at her. Seeing this, Magath gives Galliard the order to transform.
Falco, seeing Gabi is in trouble, leaves the trench to stop her. However, as he reaches Gabi, Galliard appears on the battlefield, using his Titan to physically shield the two from fire, before charging forward and destroying the outpost the two Mid-East soldiers are in.
After receiving word that Fort Slava's armored train has been disabled, Zeke and Reiner are ordered to begin their plan to parachute into Fort Slava.
Marley's Eldian unit begin to advance upon Fort Slava, and the Mid-East Allied Forces begin to retreat in terror as Galliard uses the Jaw to massacre them. Mid-East soldiers begin firing at the approaching Eldians, but are dispatched by Pieck, whose Titan has been outfitted with machine guns allowing four soldiers riding her back to fire upon their enemies. As Pieck and Galliard continue fighting, Falco drags an injured Mid-East soldier to safety, to his superior's ire.
Gabi assumes that Falco intends to use the soldier to prove that he follows international law, in order to earn the Armored Titan, which Falco denies. He asks Udo to translate what the injured soldier is saying, and his Marleyan superior laughs when Udo reveals that the soldier is calling the Warrior candidates "devils." A flair signaling the order to withdraw is shot, and the Eldian soldiers on the battlefield begin to retreat as Zeke's forces exit the airship flying above Fort Slava.
After all of the captive Eldians inside the airship are parachuted out, Zeke lets out a roar, causing them all to turn into Pure Titans. Dozens of Titans rain down on Fort Slava, crushing soldiers and buildings alike. Although roughly half of the Titans die due to the impact of the fall, those remaining begin to rise and devour the remaining Mid-East soldiers inside the Fort. As the Warrior candidates and their superiors watch, one of their superiors muses that many Marleyans were devoured in the same way that the Mid-East force are being annihilated before their eyes.
As he parachutes into Fort Slava, Reiner takes note of where the remaining anti-Titan artillery is stationed, before noticing the wall that surrounds the Fort. Recalling his time on Paradis Island, Reiner angrily adds that he has had enough of walls, and transforms into the Armored Titan, destroying a large section of the wall upon landing. He begins attacking the remaining artillery, but quickly comes to the realization that even his armor is vulnerable to their shells.
He is caught off-guard when his left arm is severed at the elbow, courtesy of a second armored train. Reiner then changes his target and goes after the train, successfully derailing it (though he loses the remainder of his left arm in the process). He is almost shot with regular anti-Titan artillery, but Galliard comes to his aid, destroying one cannon and becoming a target for the others. With the soldiers now focused on Galliard, Reiner grabs the derailed train and uses it as both shield and spear, deflecting multiple anti-Titan shells before annihilating the remaining soldiers and artillery cannons. With the targets destroyed, Reiner waves to signal Zeke.
Zeke, noting Reiner's signal as he parachutes in, reflects on the fact that the Warriors' defeat on Paradis Island was the reason for the war between Marley and the Allied Forces. After transforming into the Beast Titan, Zeke gathers up some unused artillery shells and hurls them in the direction of the Mid-East fleet. However, he is caught off-guard when the fleet turns their weapons on him and return fire. Zeke is unable to react in time to dodge the barrage of shells, and is only saved when Reiner uses his own Titan as a shield to protect him. With some ships still operational, Zeke launches a second barrage of artillery, successfully sinking the remaining Mid-East fleet.
Having lost their fleet, the Mid-East Allied Forces agree to a peace treaty with Marley, bringing the two nations' four-year war to an end. However, the revelation of weaponry capable of destroying even the Warriors' Titans makes it clear that Marley now needs the power of the Founding Titan more than ever, as their power will soon be eclipsed. In a city in Marley, civilians celebrate the victory over the Mid-East Allied Forces, as a mysterious man takes to reading a newspaper.
Currently Publicly Available Information
Marley: A Military Dictatorship
Following the Great Titan War where the hero Helos led them to victory, Marley was revived as a formidable military power. Utilizing seven of the Nine Titans as "Warriors," Marley conquers enemy nations with their overwhelming strength. In addition to their Warriors, Marley's army, navy, and airborne forces assist in trampling their enemies.
Characters in order of appearance
- In this episode, the fifth opening "Shoukei to Shikabane no Michi" was replaced by the sixth opening, "My War".
- Due to the COVID-19 pandemic, Funimation added a disclaimer at the beginning of each episode stating that the English dub voice actors were able to record their lines from the safety of their homes. This disclaimer is played weekly before the English dub broadcast on Toonami.