Attack on Titan, Hajime Isayama's dark fantasy epic, unfolds across a meticulously crafted timeline that spans over a century of history while focusing intensely on a handful of pivotal years. New viewers and returning fans alike often find themselves untangling the series' layered chronology, from the Fall of Wall Maria in the year 845 to the final echoes of the Rumbling. Understanding how each arc connects—through character revelations, shifting allegiances, and the slow unveiling of the world’s secrets—is essential to grasping the story’s full emotional and philosophical weight. This guide breaks down the major story arcs, the in-universe years they encompass, and the narrative threads that weave them into one of anime’s most cohesive sagas. (Stream the full anime on Crunchyroll.)

The Beginning: The Fall of Wall Maria (Year 845)

The series opens on a catastrophic single day that shatters humanity's hundred-year peace. In the year 845, the Colossal Titan appears over Wall Maria and breaches the outer gate, allowing a flood of mindless Titans into the Shiganshina District. This trauma sets every subsequent event into motion. Young Eren Yeager watches his mother being devoured, Mikasa Ackerman’s protective instincts become cemented, and Armin Arlert’s intellectual curiosity gains a desperate edge. The invasion exposes the hypocrisies of the Military Police and the sacrifices of the Garrison, while the Survey Corps returns from an expedition to find their world irrevocably changed.

  • Introduction of key protagonists: Eren’s burning desire for freedom, Mikasa’s fierce loyalty, and Armin’s strategic mind are forged in the flames of this tragedy.
  • The Survey Corps’ mission: With 20% of humanity’s territory lost and famine looming, the Corps shifts from passive reconnaissance to an aggressive campaign to reclaim Wall Maria, eventually sending a massive expedition that fails catastrophically.

In the aftermath, the survivors retreat behind Wall Rose, and a generation grows up in overcrowded refugee camps, nursing a collective thirst for vengeance. Eren’s oath to “kill them all” becomes the story’s foundational motivation, but Isayama already plants subtle anomalies—why did the Armored Titan aim for the inner gate, and why did the Colossal Titan vanish so abruptly? These unanswered questions build a quiet tension that will echo through every arc that follows.

The Trost District Arc (Year 850)

Five years after the fall of Wall Maria, the 104th Training Corps graduates in the year 850, and tragedy strikes again during the Battle of Trost. As another Colossal Titan appears and kicks a hole in Wall Rose, the cadets are thrust into a chaotic urban battle that forces them to confront their mortality and their reasons for fighting. The arc redefines Eren’s role from traumatized boy to a weapon of mass possibility when he transforms into a Titan for the first time, punching a hole through a Titan’s neck to save Armin.

The Test of the 104th

Before the battle, we see the cadet corps formations—Jean Kirstein’s pragmatism, Sasha Blouse’s unconventional bravery, and Connie Springer’s earnestness. Under the guidance of veteran trainer Keith Shadis, they learn ODM gear maneuvers and the harsh realities of Titan combat. This training period both humanizes the supporting cast and establishes the skill hierarchy that will prove critical later. Mikasa scores top marks, Eren must overcome his broken gear with sheer willpower, and the quiet philosophical tensions between those who want to join the Military Police for safety (Jean) and those who see the Survey Corps as humanity’s hope (Eren) simmer loudly.

The Battle and Eren’s Awakening

The battle itself is a masterclass in tension and chaos. Supply lines are cut, morale crumbles, and characters are brutally killed. Eren’s apparent death inside a Titan’s stomach marks a harrowing low point, only for him to emerge as a rogue Titan that fights with terrifying intelligence. His subsequent capture by the military and the debate over his fate exposes the deep-rooted fear and ignorance surrounding Titan shifters. It is Commander Erwin Smith’s inspired gamble—proposing to use Eren to retake Trost—that saves his life and brings the Survey Corps their first real strategic advantage.

This arc introduces the series’ core theme: the tension between viewing someone as a monster or a weapon versus recognizing their humanity. Eren’s Titan is a tool, but he is also a scared teenager struggling with horrifying power. The connection to the Fall of Wall Maria is direct: the same Colossal Titan that destroyed Shiganshina has now attacked Trost, proving the threat isn’t random but intentional. The narrative begins to ask: Who is the enemy, and what do they want?

The Female Titan Arc (Year 850)

Following the victory at Trost, the Survey Corps embarks on the 57th Exterior Scouting Expedition, where they encounter a new, agile Titan shifter that targets Eren with unnerving precision. The Female Titan Arc accelerates the series into a cat-and-mouse investigation that fractures trust inside the Corps and reveals that Titan shifters are hiding among humanity, potentially within the military itself.

Annie’s True Nature

Annie Leonhart, the stoic and isolated cadet from the 104th, is unmasked as the Female Titan after a tense chase through the Forest of Giant Trees. Her capture attempt forces the Corps to acknowledge a painful truth: the enemies they’ve fought for years are not just mindless monsters but people with faces, families, and agendas. The revelation that Annie crystallized herself to escape interrogation underscores the desperation of her mission and the limits of human understanding.

Cracks in the Corps

Commander Erwin’s willingness to sacrifice soldiers—including Levi’s entire special operations squad—to capture the shifter drives a wedge between utilitarian strategy and personal loyalty. Levi’s silent fury, Eren’s guilt over Levi squad’s deaths, and Armin’s growing willingness to emotionally manipulate others all mature rapidly. The arc also introduces the concept of hardening abilities and the latent power of the Coordinate, though neither is fully explained yet. Crucially, the Female Titan’s uncanny resemblance to Annie feeds into the series’ recurring visual symbolism: the same hair color, the same fighting stance. The circle of suspects narrows to familiar faces, making the eventual betrayal all the more personal.

This arc directly connects to the Trost battle’s unresolved questions: how many more Titan shifters exist, and have they been moving among the soldiers all along? The trust that held the 104th together begins to crack, setting the stage for the devastating revelations ahead.

The Clash of Titans Arc (Year 850)

Barely a month after the Female Titan incident, the world is upended again when the Beast Titan appears near Wall Rose, turning the villagers of Ragako into Titans. The arc explodes with a cascade of betrayals that reshape the core cast forever. At Utgard Castle, Reiner Braun and Bertholdt Hoover—two of Eren’s most trusted comrades—reveal themselves as the Armored and Colossal Titans. The confession is so casual, so matter-of-fact, that it feels surreal: “I’m the Armored Titan, he’s the Colossal.”

Ymir’s Hidden Past and the Coordinate

During the struggle at Utgard, the mysterious Ymir transforms into the Jaw Titan to protect Historia, proving that her own history is deeply intertwined with the larger conspiracy. The arc later reveals that Ymir was once a mindless Titan roaming outside the walls for sixty years before eating a shifter and regaining her humanity. Her devotion to Historia and her eventual decision to return with Reiner and Bertholdt to Marley inject a heartbreaking pattern of sacrifice that ripples into the Uprising and Marley arcs.

The Beast Titan’s Threat

Zeke Yeager’s introduction as the Beast Titan—a talking, intelligent ape-like Titan who commands other Titans with a scream—shatters previous assumptions about Titan biology. His overwhelming power at Ragako and his strategic mind foreshadow a much larger world beyond the walls. The battle to rescue Eren from Reiner and Bertholdt culminates in a desperate clash where coordinate powers instinctively activate, allowing Eren to command Pure Titans. This moment is the first major hint that the Founding Titan’s power lies dormant inside him, a thread that will unravel the history of Eldia itself.

The Clash of Titans arc ties the personal betrayal of Reiner and Bertholdt to the larger existential war. It demonstrates that the warriors are not simply evil; they are brainwashed soldiers operating under a mission they believe is just. The internal guilt that will plague Reiner for years begins here, paralleling Eren’s own descent into extremism.

The Uprising Arc (Years 850–851)

After the chaos of the Clash of Titans, the story pivots from Titan battles to political warfare. The Uprising Arc reveals that the true enemy within the walls may not be Titans but the corrupt monarchy that has suppressed the truth for a century. The arc spans the remainder of 850 and bleeds into 851, centering on Historia Reiss and the conspiracy that erased her identity.

The Overthrow of the Fake King

Erwin Smith, Levi, and Hange uncover that the real power lies with the Reiss family, the true royal bloodline with the ability to wield the Founding Titan’s full strength. The current king, Rod Reiss, has been using a puppet ruler to maintain a false peace while erasing potential threats—including Historia’s mother. The Survey Corps orchestrates a coup, revealing the government’s illegal human trafficking and Titan experiments. This political revolution, while morally gray, frees the walls from centuries of stagnation and allows humanity to finally confront the world beyond.

Historia’s Choice and Grisha’s Memories

At the story’s emotional core, Historia rejects her father’s plan to consume Eren and become the God-like Founding Titan, instead smashing the syringe and reclaiming her own identity as a queen who serves the people. Simultaneously, the arc unlocks fragments of Grisha Yeager’s past through Eren’s memories: a childhood in a ghetto called Liberio, a younger sister fed to dogs, and a shadowy warrior organization called the Restorationists. These visions hint at a civilization far more advanced than the medieval society inside the walls, complete with photographs, trains, and flying machines. The connection between the walls’ religion, the memory erasure of the Founding Titan, and the outside world’s hatred of the “Subjects of Ymir” is now explicitly drawn.

The Uprising Arc thematically bridges the insurrection within Paradis to the global conflict that will dominate later seasons. It teaches that freedom cannot rely on a single savior; it requires collective defiance. For more on the series’ intricate political themes, Anime News Network’s deep dive into freedom and oppression in Attack on Titan offers compelling analysis.

The Return to Shiganshina Arc (Year 851)

With the monarchy overthrown, the Survey Corps launches Operation to Retake Wall Maria, culminating in an all-or-nothing battle in the ruins of Eren’s hometown. This arc delivers the long-awaited basement revelation while slaughtering beloved characters in a brutal confirmation that heroes are not immune to tragedy.

The Battle and the Basement

Erwin leads a suicide charge against the Beast Titan to give Levi an opening, a tactical masterpiece that costs nearly every Survey Corps soldier their lives and leaves Armin gravely burned. The emotional stakes reach a fever pitch when Levi must choose between reviving Erwin or Armin with the Titan serum, a decision that reshapes the moral calculus of the story. Eren finally reaches his basement and uncovers Grisha’s journals, which reveal the truth: humanity is not extinct. The walls exist on an island called Paradis, walled off from a world that sees its inhabitants as devils. The Titans are not a natural phenomenon but a biological weapon created by Marley, a dominant global empire, using the Eldian race as disposable tools.

The World Beyond the Walls

The basement revelation splits the narrative into “before” and “after.” Everything the characters believed about their world was a lie. The story pivots from a post-apocalyptic survival tale to a geopolitical tragedy where racism, imperialism, and historical guilt shape every action. The arc connects Grisha’s revolutionary past in Liberio, the Marleyan Warrior Program, and the mysterious “Attack Titan” that has always pursued freedom. Eren’s memory fragments from Uprising now snap into place, and the readers see the chilling parallels between his father’s radicalization and his own growing coldness.

The Return to Shiganshina arc ties together every clue dropped since the first chapter: the Colossal and Armored Titans’ coordinated attacks, the reason for the walls’ existence (they are made of millions of colossal Titans), and the purpose of the Coordinate. It marks the end of the first major narrative block and the transition to a much wider stage.

The Marley Arc (Year 854)

Following a three-year time skip, the perspective shifts to the other side of the ocean, following the warrior candidates of Marley’s Eldian internment zone. This arc forces the audience to see the “enemy” as complex, traumatized individuals fighting for the chance to be seen as “honorary Marleyans.” The year is 854, and the world is gearing up for a global war that leaves Marley desperate to acquire Paradis’s resources and the Founding Titan.

Warriors and Victims

Through the eyes of Falco Grice, Gabi Braun, and the returning Reiner—who still suffers from severe PTSD—the arc depicts the brutal propaganda and systemic racism that drove Reiner, Bertholdt, Annie, and Zeke to breach the walls. Reiner’s shattered psyche, split between “warrior” and “soldier,” reveals the weight of genocide on a child soldier. This reframing makes the previous arc’s betrayals feel less like villainy and more like tragedy, deepening the thematic exploration of cycles of violence.

Eren’s Infiltration and Declaration of War

Eren, now a hardened, emotionally distant man, infiltrates Liberio under a false identity and reconnects with Reiner at a tense underground gathering. When Willy Tybur, the true ruler of Marley, declares war on Paradis before a global audience, Eren transforms and begins a massacre. This event—the Attack on Liberio—mirrors the Fall of Shiganshina, casting Eren in the role of the Colossal Titan who destroys a home. The arc ends with the global alliance forming against Paradis and Eren returning to the island to prepare for the Rumbling. Every action in the previous arcs—the sacrifices, the discoveries, the political shift—has led to this irreversible point of global conflict.

The Final Season: The Rumbling (Year 854–857)

The final arc of Attack on Titan chronicles the ultimate confrontation between Eren’s apocalyptic plan and the last-ditch alliance of former enemies. Once the rumbling is unleashed, millions of Wall Titans trample the earth, exterminating 80% of humanity. The story shifts into full philosophical crisis mode, questioning whether any end can justify such omnicide.

The Alliance and the Yeagerists

Paradis fractures into two factions: the Yeagerists, who follow Eren and Zeke’s plan to use the Founding Titan to euthanize all Eldians (or unleash the Rumbling), and the Alliance, a fragile coalition of Survey Corps veterans, Marleyan warriors, and former Titans who vow to stop the massacre. The internal conflict between Mikasa’s love, Armin’s hope for diplomacy, and Eren’s fatalistic determination drives heart-wrenching moments. The rumbling becomes the ultimate expression of the “cycle of hatred” that the series has chronicled since the beginning.

Confronting Eren and the Paths

The final battle in the Paths—a timeless, ethereal dimension where all Subjects of Ymir are connected—reveals the true history of Ymir Fritz and the origin of Titan powers. Eren’s motivations are finally laid bare: he saw the future through the Attack Titan’s power and concluded that a world without hatred is impossible without erasing it violently. The climax sees Armin and Zeke engaging in philosophical debate, Mikasa’s final choice breaking Ymir’s curse, and Eren’s death ending the Titan era for good.

The epilogue, set three years after the battle (around year 857), shows a world rebuilding from ash, with Paradis as an independent nation struggling to survive. History does not end neatly; marleyan survivors still harbor resentment, and the survivors on Paradis turn to militarism. The interconnected arcs come full circle: Eren’s original desire for freedom, born from his mother’s death, ultimately destroyed almost all freedom. The final scenes affirm that humans will always fight, but perhaps with enough memory of horror, they can choose differently.

Conclusion: The Interconnectedness of Arcs

Every arc in Attack on Titan builds a narrative architecture where early events reverberate with later revelations. The Colossal Titan’s appearance in 845 created the trauma that forged Eren; the basement reveal of 851 reframed every Titan battle as a proxy war; the Marley arc humanized the warriors and exposed the poison of nationalism; and the Rumbling executed the most extreme possible response to a cruel world. Isayama’s timeline is not a linear list of events but a spiral, where each return to a place or memory deepens the themes of freedom, sacrifice, and the cyclical nature of violence. Understanding these connections transforms the viewing experience from a simple action spectacle into a profound meditation on history and human nature. (You can revisit the manga’s complete narrative through Kodansha’s official Attack on Titan page.)