The Nameless Soldiers

Na mo Naki Heishi (名も無き兵士) is the 2nd chapter of the 20th volume and the 80th chapter overall of the Attack on Titan manga, written and illustrated by Hajime Isayama.

Overview
The Survey Corps watch in shock the motionless body of Eren's Titan slammed atop Wall Maria, wondering if he's still alive, but they can't be distracted much since the Colossal Titan keeps aproaching the Wall. Jean orders his comrades to draw his attention while Mikasa shoots Thunder Spears to the Titan's nape, but Bertolt easily sees through their scheme and releases a burst of hot steam, deflecting the Thunder Spears and injuring his former friends. Armin goes to help the wounded Mikasa, but admits that he still doesn't have any plan to take them out of their predicament. To make matters even worse, they watch in horror as a fully recovered Armored Titan stands up, ready to rejoin the fight.

Meanwhile, Levi urges Erwin to order the retreat and save the few survivors, but Erwin reveals that he still has an strategy to defeat the Beast Titan, though at the cost of his and the new recruits' lives. He admits that the only thing that stops him is his desire to live long enough to see the basement, but Levi prompts him to forget his dreams and do what he has to do.

Erwin leads the recruits into a direct suicide attack against the Beast Titan to serve as decoys while Levi sneaks through the horde of Titans, using them as trees to maneuver with the 3DMG as he approaches the Beast Titan in order to attack him by surprise. Erwin and his troops continue riding towards the enemy, using the Signal Flares to obstruct his sight. As Zeke launches a rain of rocks towards them, Erwin and his horse are quickly hit by a projectile.

Summary
Atop Wall Maria, Eren lies immobile after being brutally slammed there by the Colossal Titan's kick. Erwin and Levi watch the scene in shock while Mikasa wonders if he's still alive. However, Jean assures her that Eren is alive and shouts for everyone to focus on the Colossal Titan, who continues on his way to attack the Wall.

Jean orders Connie and Sasha to help him draw Bertolt's attention while Mikasa shoots Thunder Spears to his nape. The three attempt to distract him with insults and nicknames, but Jean realizes they are being too obvious and Bertolt probably has already realized that Mikasa is behind him; though still hopes that she will be able to hit him. Mikasa launches the spears, but Bertolt responds by releasing a massive burst of hot steam, which deflects the spears as well as blows away the grapple hooks of her maneuver gear and violently pushes everybody back, causing them superficial burns.

Armin comes to help Mikasa, who was hit in her right arm by a Thunder Spear shrapnel, though she replies that the wound isn't deep. She asks him if he has devised a plan to counterattack, but Armin admits that he still doesn't have any. At that moment, they and Jean hear a sound at their backs, and watch in horror that the Armored Titan has fully recovered and is standing ready to return to the fight.

Meanwhile, the Beast Titan continues launching rocks at the Survey Corps' hiding spot. Levi tells Erwin that at that rate it won’t be long before he turns it all into rubble, and urges him to order the retreat if he doesn't have any counterattack method left, using Eren to carry the few survivors.

As Erwin and Levi speak, the new recruits are overcome with terror. Marlo Freudenberg tries to calm down a recruits who has allowed a horse to escape, but is taken aback when the recruit lashes out, claiming that they will all be killed and therefore din't need horses. As Marlo watches, the recruit begins bemoaning his decision to join the Survey Corps, despite the risks involved.

Levi volunteers to engage the Beast Titan while the rest of the Corps escapes. Erwin tries to convince him otherwise, but Levi insists that all hope will be lost if Erwin and Eren don't escape. At Levi's prompting, Erwin reveals that he still has one last plan to defeat the Beast Titan, and that he did not reveal it to Levi because it would result in the deaths of all of the Survey Corps' recruits and Erwin himself. As he watches the recruits panic, Erwin notes that although most of them will likely die regardless of his decision, they will only willingly give up their lives if he leads them into battle. Noting that this will mean he will be the first to die, Erwin quietly notes that his plan will mean he will never get to see Eren's basement, a statement which draws Levi's attention.

Erwin reveals to Levi that his only desire is to reach Eren's basement, and discover the secrets within it, so that he will finally be able to answer all of the questions he's had since his father's death. As he reveals this to Levi, he bemoans the fact that, after staving off death so many times, he will have to sacrifice his life before discovering these secrets, which are now within his grasp. Finally, he asks if Levi can seem them: the fallen Survey Corps soldiers, who want to know what has happened to their hearts, which they devoted to the Survey Corps' cause. Levi assures Erwin that he has done his job leading the Corps well, but advises him to abandon his dream. His only job now is to lead the Survey Corps' recruits straight into hell, so that Levi can engage the Beast Titan.

As the Beast Titan crushes another rock in preparation for his next attack, he is surprised to see the Survey Corps coming straight at him in a direct attack. Amused, he notes that while he hadn't expected to give up without a fight, he had assumed they would have a better strategy than a frontal assault. The soldiers, under Erwin's command, begin firing their signal flares, and the Beast Titan observes, as he prepares to throw his next volley of projectiles, that they are using the flares as signals. Watching the Beast Titan, Erwin warns the recruits that another attack is coming, as he reflects on how he convinced them to agree to his frontal assault.

Erwin ordered the recruits to line up, informing them that they will be charging the Beast Titan from the front, and using their signal flares to disrupt his aim as much as possible, while Levi uses the diversion to kill the Beast. After his speech, he instructed a bewildered Levi to use his Three Dimensional Maneuver Gear to approach the Beast Titan, using the Titans surrounding him to maneuver into a position where he can kill him.

As Levi advances his way to the Beast Titan's position, slaughtering mindless Titans as he goes, he sees Erwin's forces firing their signal flares and silently apologizes to them as he recalls the recruits' reactions to learning of their impending demise.

Upon hearing Erwin's plan, one of the recruits had approached him, noting that they will die whether they obey their commander's orders or not. Erwin confirmed his observation, noting that no matter what, getting crushed by a rock would result in the same experience for all of them, and that everyone would die sooner or later. However, this did not make their lives, or the lives of their fallen comrades any less meaningful. They would remember the lives of their fallen soldiers, while the next generations of soldiers would remember their lives after they died.

Leading his soldiers into battle, Erwin continues to encourage them. Even as he and his comrades are torn to pieces by the Beast Titan's projectiles, he encourages his soldiers to fight and let their voices be heard.

Trivia

 * This chapter marks the first appearance of Isabel Magnolia and Farlan Church in the main manga, among the soldiers Erwin envisions while feeling responsible for their deaths.