Introduction to the World of Attack on Titan

Attack on Titan (Shingeki no Kyojin), created by Hajime Isayama, is a landmark dark fantasy epic that redefined modern anime and manga storytelling. The series follows humanity’s desperate struggle for survival in a world overrun by man-eating Titans, but as the narrative unfolds across multiple story arcs, it transforms into a morally complex tale about war, freedom, and the cyclical nature of hatred. This timeline maps out the major arcs in chronological order of the story, highlighting key events, character breakthroughs, and the philosophical turning points that make the journey unforgettable.

The Chronological Framework: Years and Walls

Isayama based the calendar on a fictional system, beginning with the year 845 marking the Fall of Wall Maria. Most of the early arcs take place inside the three concentric Walls — Maria, Rose, and Sina — on the island of Paradis. Later arcs expand the scope to the outside world, particularly Marley. Understanding this timeline is essential because the story frequently jumps forward months or even years, and the final season weaves together past and present. Below, each arc is presented with its approximate in-universe timeframe and narrative significance.

The Fall of Shiganshina Arc (Year 845)

The story opens in Shiganshina District, a peaceful town nestled against Wall Maria. Eren Yeager lives with his parents and his adoptive sister Mikasa Ackerman, alongside his best friend Armin Arlert. The trio’s quiet life shatters when the 60-meter-tall Colossal Titan appears, breaching the outer gate, and the Armored Titan smashes through the inner gate, letting a horde of mindless Titans flood the district. This cataclysmic event results in the death of Eren’s mother, Carla, devoured before his eyes — a trauma that fuels his vow to exterminate every Titan.

The arc establishes the series’ signature brutality and introduces the primary emotional core of the narrative: Eren’s obsessive rage, Mikasa’s fierce protectiveness, and Armin’s strategic mind. The survivors are forced to retreat behind Wall Rose, leading to famine, overpopulation, and a grim existence. Key characters like Hannes, who fails to save Carla, and Keith Shadis, the Survey Corps instructor, make their first impressions. The arc ends with a two-year time skip, as the trio enlists in the military to fight back.

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The Battle of Trost Arc (Year 850)

After graduating as the top cadets of the 104th Training Corps, Eren and his friends are assigned to the Trost District. The Colossal Titan strikes again, breaching Wall Rose, and the recruits are thrown into the bloodiest battle yet. This arc marks Eren’s shocking discovery that he possesses the power of the Attack Titan, an intelligent Titan shifter, when he transforms into a 15-meter class monster to save his comrades and plug the hole in the wall. The military initially regards him as a threat, but through the tactical genius of Armin and the leadership of Commander Dot Pixis, Eren is entrusted with the mission to seal the breach with a massive boulder.

This arc also introduces the concept of the “Titan shifters,” setting the stage for the mysteries that dominate the following arcs. The death and sacrifice of countless soldiers, including several named characters like Thomas and Mina, underscore the series’ readiness to kill off important figures. The victory at Trost is pyrrhic, but it gives humanity its first real hope against the Titans. Eren is placed under the custody of the Survey Corps, led by the enigmatic Captain Levi.

The Female Titan Arc (Year 850)

As the Survey Corps conducts its 57th Exterior Scouting Expedition beyond the walls, a new intelligent Titan appears — the Female Titan, who displays uncanny fighting skills and an apparent interest in capturing Eren. The arc is a tense cat-and-mouse game through the dense forests of Giant Trees. Levi’s squad is brutally annihilated, revealing the devastating gap in power between even the elite soldiers and the shifters.

The Female Titan’s identity is eventually unmasked: it is Annie Leonhart, a close friend and fellow cadet of the 104th. Her revelation shatters the trust among the main group and forces a brutal confrontation in Stohess District, inside Wall Sina. The battle not only devastates the city but also leads to Eren’s first loss of control, manifesting a berserk form. Annie crystallizes herself to avoid interrogation, escaping justice for the time being. This arc deepens the enigma of the Titans, hinting at a larger conspiracy and introducing the idea that humans can transform into Titans, raising unsettling questions about who the real enemy is.

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The Clash of the Titans Arc (Year 850)

Immediately following the Female Titan crisis, the Survey Corps is thrown into chaos when Titans appear within Wall Rose, suggesting another breach. The arc races across the countryside as soldiers discover that the Beast Titan — a hairy, ape-like shifter — has turned the residents of Connie’s village into Titans, a horrifying new power. The situation escalates when Reiner Braun and Bertholdt Hoover reveal themselves as the Armored Titan and the Colossal Titan, respectively, in one of the most iconic plot twists in anime history.

Eren, filled with betrayal and fury, battles Reiner while Mikasa and the others fight to rescue him. The conflict culminates in a desperate struggle to retrieve Eren from the shifters’ clutches, with the coordinated effort of the entire Survey Corps, including Commander Erwin Smith, who loses his arm in the process. The arc ends with the Titan shifters escaping, but not before a colossal clash atop the walls and the retrieval of Ymir, another Titan shifter with a mysterious past. This arc recontextualizes the entire narrative: the enemy is not just mindless Titans but human warriors from outside the walls with a hidden agenda. The truth about Paradis Island begins to surface.

The Uprising Arc (Year 850)

With the revelation of intelligent Titans within their ranks, the military government begins a purge of the Survey Corps to silence the truth. This arc shifts the focus from Titan battles to political intrigue and internal warfare. The ruling monarchy, led by the fake king and the corrupt nobles, conspires to execute Erwin and dismantle the scouts. The Survey Corps goes into hiding, and a game of shadows begins in the capital.

The story introduces the true power behind the walls: the Reiss family, the legitimate royal bloodline, and their secret Titan ability. Commander Erwin uncovers the truth that the Reiss family holds the Coordinate power, which can control Titans and alter the memories of mankind. The arc’s emotional core lies with the character of Historia Reiss, who learns she is the illegitimate heir to the throne and is manipulated to consume Eren and take the Founding Titan. However, in a heartfelt decision, Historia breaks the cycle and kills her father, Rod Reiss, after he transforms into a monstrous, distorted Titan.

The Uprising arc also features the iconic Levi vs. Kenny squad battles, showcasing the Ackerman clan’s superhuman strength. By the end, the corrupt government is overthrown, Historia is crowned as the true queen, and the Survey Corps gains access to the land of walls, ready to reclaim Wall Maria. This arc is pivotal for its expansion of the lore: the existence of the Founding Titan, the memory-altering power, and the deepening of the series’ theme about freedom from oppressive systems.

The Return to Shiganshina Arc (Year 850)

Considered the pinnacle of the mid-series build-up, this arc is the military operation to retake Wall Maria and seal the breach in Shiganshina. The Survey Corps stages an all-or-nothing assault, expecting a trap from the Warriors — Reiner, Bertholdt, and the Beast Titan, Zeke. The battle unfolds in multiple phases: a diversionary attack on the Beast Titan by Levi and Erwin’s suicide charge, the explosive destruction of the Armored Titan by a Thunder Spear-equipped Mikasa, and the heartbreaking sacrifice of Armin, who burns to a crisp while distracting the Colossal Titan so Eren can land a decisive blow.

The operation succeeds at an immense cost. Virtually all of the new recruits are slaughtered by Zeke’s rock-throwing Titan form; Erwin Smith and Armin both lie mortally wounded, and Levi must choose whom to save with the Titan serum. Levi ultimately passes the serum to Armin, reviving him as the inheritor of the Colossal Titan. They then venture into Grisha Yeager’s basement, where the truth about the world is finally revealed: humanity lives beyond the walls, the Titans are transformed Eldians, and Eren’s father came from the nation of Marley. This basement reveal changes everything, concluding the major “Paradis” story with a world-shattering paradigm shift.

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The Marley Arc (Year 851–854)

After a three-year time skip, the narrative cuts to the other side of the ocean, to the Marleyan continent. The story introduces the young Warrior candidates — Gabi Braun, Falco Grice, Udo, and Zofia — who are being trained to inherit the Armored Titan and other powers. This arc is a masterclass in empathy reversal, as the audience is forced to see the Eldians of Liberio as oppressed people living in internment zones, brainwashed with propaganda. The Marleyan military, backed by the power of seven of the Nine Titans, is bent on conquering Paradis for its natural resources.

The arc follows the Marley mid-east war and then Reiner Braun’s psychological deterioration as he confronts his sins. The tension escalates when Eren Yeager, now an infiltrator in Liberio under a false identity, attends a festival and has a private conversation with his grandfather, followed by his collaboration with the Paradis Survey Corps (now the Scout Regiment). The climax is the “Attack on Liberio,” where Eren transforms into the Attack Titan during a public stage performance, kills the Tybur family head — who held the War Hammer Titan — and devours her power. The scouts, using advanced anti-Titan weaponry, engage in a brutal urban battle, extracting Eren and retrieving the War Hammer Titan, but not before causing mass civilian casualties, marking a dark turning point where the protagonists become the aggressors. The arc ends with a declaration of war and the world uniting against Paradis.

The War for Paradis Arc (Year 854)

The final major arc of the series (spanning the final season) returns to Paradis as the scouts face global condemnation. Eren has become increasingly radicalized, seeing no path to peace except through the Rumbling, a cataclysmic plan to unleash thousands of colossal Titans hidden in the walls to wipe out the world. Internal conflict fractures the main group. Mikasa, Armin, Jean, Connie, and Hange struggle to contain Eren, who acts on his own to align with the Yeagerist faction, a nationalist movement that seizes power on Paradis.

This arc is filled with betrayals, difficult ethical choices, and culminating battles. Zeke’s Euthanization plan, using the Founding Titan's power to sterilize the Eldian race, is revealed, but Eren deceives him to activate the true Rumbling. The moment Eren and Zeke touch, the paths of all Subjects of Ymir converge in the coordinate, and billions of Colossal Titans breach the walls, marching across the planet. The Alliance — a coalition of former friends and enemies, including Annie, Reiner, Pieck, and the surviving scouts — mounts a desperate final stand to stop Eren, culminating in the Battle of Heaven and Earth atop the skeletal Founding Titan. The resolution delves into the nature of Ymir Fritz, the origin of the Titans, and Eren’s tragic motivation: to grant his friends long, free lives at the cost of his own soul and most of humanity. The arc concludes with a bittersweet ending where Mikasa kills Eren, breaking the Titan curse, and the world begins a fragile peace, though the cycle of conflict may continue in far-off times.

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Timeline of Key Events Beyond the Major Arcs

  • Year 743: The first King of the Walls, Karl Fritz, uses the Founding Titan to raise the three Walls and erase the Eldians’ memories, retreating to Paradis.
  • Year 825: Grisha Yeager is born in the Liberio internment zone; his sister Faye is murdered by Marleyan soldiers, radicalizing him.
  • Year 832: Grisha inherits the Attack Titan from Eren Kruger and travels to Paradis to begin his mission.
  • Year 845 before the fall: Grisha acquires the Founding Titan after slaughtering the Reiss family except for Rod Reiss and injects young Eren with Titan serum; the same day, Eren eats his father unknowingly.
  • Year 850: The events from the Battle of Trost through Return to Shiganshina take place within a single tumultuous year.
  • Year 851: The survey ships reach the ocean; Eren and the scouts discover the wider world.
  • Year 854: The attack on Liberio sparks the global alliance against Paradis, leading to the Rumbling.

Thematic Evolution Across the Arcs

The chronological progression of arcs mirrors Eren Yeager’s transformation from a black-and-white hero to a morally gray anti-hero, and finally to a tragic antagonist. In the early arcs, humanity’s fight against the Titans is presented as an unambiguous battle for survival. As the truth emerges, the narrative dismantles the simple us-versus-them mentality, exposing cycles of hatred, systemic oppression, and the burden of history. The timeline reveals how each arc peels back a layer of the world’s secrets: first the nature of Titans, then the identity of the shifters, then the political corruption, and finally the entire global order. This careful pacing ensures that revelations land with emotional and intellectual impact, turning Attack on Titan into a profound meditation on freedom, nationalism, and the cost of vengeance.

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Conclusion

Mapping the major arcs of Shingeki no Kyojin reveals a meticulously crafted narrative that grows in scope without ever losing its focus on character and consequence. From the traumatic fall of Shiganshina to the world-ending Rumbling, every arc builds upon the last, forcing the audience to constantly re-evaluate their allegiances and assumptions. For both new viewers and seasoned fans, understanding the timeline enhances appreciation for Isayama’s storytelling — a saga where time, memory, and destiny intertwine to deliver one of the most unforgettable journeys in modern fiction.