Few anime series have reshaped the global landscape of storytelling quite like Attack on Titan. From its very first episode, the narrative yanks viewers into a world where humanity cowers behind enormous walls, preyed upon by mindless giants known as Titans. What begins as a desperate survival story evolves into a sprawling epic about freedom, cyclical hatred, memory, and the weight of history. To truly appreciate the scale of its ambition, it helps to trace the timeline from humanity’s near-extinction to the final cataclysmic battle. This chronology frames the evolution of the fight against Titans—not just as a military campaign, but as a philosophical war over the future of a species.

Before the Walls: The Age of the Founding Titan

Long before Wall Maria, Rose, and Sheena existed, the world belonged to the Eldian Empire. Ymir Fritz, a young slave, gained the power of the Titans roughly two thousand years before the main story. According to lore, she became the Founding Titan after merging with a mysterious spine-like organism in the depths of a giant tree. As the first Titan, Ymir could shape reality itself, connecting all Subjects of Ymir across time through invisible paths. For thirteen years she served King Fritz, conquering neighboring lands and expanding the Eldian domain, until she sacrificed herself to save him from an assassination. After her death, her power split into the Nine Titans: the Founding Titan, Attack Titan, Colossal Titan, Armored Titan, Female Titan, Beast Titan, Jaw Titan, Cart Titan, and War Hammer Titan.

In the centuries that followed, these Titans were passed down among noble Eldian families, becoming weapons of mass subjugation. Eldia grew into a merciless empire, using Titan warfare to dominate the ancient nation of Marley and countless other peoples. Atrocities committed during this era—mass burnings, forced breeding, and cultural erasure—laid the foundation for the hatred that would later consume the world. The Marleyans eventually launched a successful counter-revolution, turning several of the Nine Titans over to their side. This civil war known as the Great Titan War fractured Eldia, and in its final act, the 145th King of Eldia, Karl Fritz, retreated to the island of Paradis with many of his Subjects of Ymir. Using the power of the Founding Titan, he raised three concentric Walls from the earth, mind-wiped his people’s memories, and imposed a vow renouncing war. Humanity inside the Walls was taught that they were the last of mankind, completely unaware of the advanced civilizations beyond the ocean.

The Era of the Walls (A Century of Managed Ignorance)

For over one hundred years, the people of Paradis lived with only fragile tales of the outside world. The three Walls—Maria, Rose, and Sheena—stood as both protection and cage. Inside, a feudal society developed. The Royal Government, secretly controlled by the Reiss family and the descendants of the first king, perpetuated a false history through the Church of the Walls and suppressed technological advancement. A compliant Military Police Brigade enforced the status quo in the innermost Wall Sheena, while the Garrison guarded all three districts, and the Survey Corps ventured into Titan territory to reclaim the land. King Fritz’s ideology—that a fleeting paradise of ignorance was preferable to a world of war—was accepted by most.

Yet the vow renouncing war created a paradox. It bound any royal blood holder of the Founding Titan to passivity, forbidding full-scale retaliation even if Titans breached the Walls. This meant that while the people within the Walls lived with moderate safety, they were also utterly dependent on a fragile peace. Technology like firearms existed but was rudimentary. The Titans they faced were primarily mindless Pure Titans sent by Marley as a punitive measure against the “devils” of Paradis. The Survey Corps suffered staggering casualty rates outside the Walls, all while a hidden government erased dissidents like the Ackerman clan, whose immunity to memory manipulation threatened the king’s false paradise. This quiet era, however, was never meant to last.

The Fall of Wall Maria: Year 845

Everything changed on that sunlit day in the Shiganshina District. The Colossal Titan—60 meters of bone, muscle, and steam—appeared above the Wall and kicked a hole through the outer gate. Moments later, the Armored Titan rammed through the inner gate, allowing a flood of mindless Titans to pour into the district. The event, known as the Fall of Wall Maria, triggered a humanitarian catastrophe. Over a fifth of humanity within the Walls perished in the immediate aftermath or during the subsequent famine. Survivors, including young Eren Yeager, Mikasa Ackerman, and Armin Arlert, were forced to flee into Wall Rose territory. Eren’s mother, Carla, was eaten before his eyes, cementing his hatred of all Titans.

The loss of Wall Maria also exposed the gaping inadequacy of the existing military. The government responded with a failed operation to retake the territory—sending 250,000 civilians to their deaths as part of a population-reduction strategy disguised as a reclamation campaign. This act, ordered by the secret monarchy, revealed the cruel calculus that sustained the Walls. In the chaos, key figures like Grisha Yeager, Eren’s father, moved his own secret agenda forward. An Eldian restorationist from Marley, Grisha had acquired the Attack Titan and, on the night of the breach, located the Reiss family’s underground chapel where he consumed the Founding Titan, stealing its power from the royal bloodline. He later passed both the Attack Titan and Founding Titan to his son Eren via a painful injection, urging him to reach the basement of their old home and reclaim the truth. The timeline of these events—taking place within a single night—would haunt the series for years to come.

The Rise of Eren Yeager and the 104th Cadets

Following the breach, Eren, Mikasa, and Armin joined the 104th Training Corps, driven by vengeance and hope. Their training under drill instructor Keith Shadis forged the bonds that would define the rest of the series. Eren’s intense resolve, combined with his latent Titan abilities, made him both a breakout soldier and a target of those who already knew the secrets of his father. At the same time, sleeper agents from Marley—Reiner Braun (the Armored Titan), Bertholdt Hoover (the Colossal Titan), and Annie Leonhart (the Female Titan)—infiltrated the military, seeking to recover the Founding Titan.

Eren’s Titan-shifting nature was publicly revealed during the Battle of Trost District, when the Colossal Titan appeared again and breached Wall Rose’s outer gate. Cornered and seemingly devoured, Eren emerged inside the stomach of a Titan and transformed for the first time into a 15-meter Rogue Titan. He used his new form to plug the breach with a massive boulder, turning the tide and earning the provisional trust of the Survey Corps. This victory was pyrrhic: Trost was devastated, and humanity’s military leadership now realized that the enemy could be human. The Survey Corps, led by the brilliant but eccentric Erwin Smith, became the spearhead for uncovering the truth—and Eren was at the center of their plans.

The Female Titan and the 57th Exterior Scouting Mission

Paranoia deepened during the 57th expedition beyond the Walls. Commander Erwin devised a trap to draw out the hidden Titan shifter who had been targeting Eren. The mission saw the Survey Corps riding through dense forests, only to be ambushed by the Female Titan: an abnormally agile, crystalline-covered shifter that displayed shocking intelligence. Levi’s elite squad, handpicked to protect Eren, was systematically slaughtered. Eren, lured into a rage by his friends’ deaths, transformed but was easily captured—until Levi and Mikasa intervened.

The identity of the Female Titan, later revealed to be Annie Leonhart, shattered any remaining illusions of safety. Her betrayal, and the subsequent crystallization that prevented interrogation, exposed a vast conspiracy. The Survey Corps discovered that Wall Sheena itself contained embedded Titans, nicknamed the “Wall Titans,” within hardened structures. This revelation raised terrifying questions: if millions of Colossal Titans slumbered inside the Walls, what force had sealed them there? And what would happen if they ever broke free? For more context on the Wall Titans, the Attack on Titan Wiki provides an extensive breakdown.

The Clash of the Titans and the Secret of the Basement

The conflict escalated when Reiner and Bertholdt revealed themselves on top of Wall Rose, shattering the fragile bond they had formed with their comrades. The battle that followed, known as the Clash of the Titans, forced Eren to confront the fact that the enemies who destroyed his home had been his friends. In a desperate showdown, the Survey Corps pursued the traitors into the Forest of Giant Trees, where Erwin risked everything, leading a mass suicide charge to distract the newly appeared Beast Titan—a shifter with the ability to hurl projectiles with lethal precision. The charge bought Levi an opening to maim the Beast Titan, but the cost in lives was devastating.

Ultimately, the Survey Corps retook Shiganshina and reached the basement of the Yeager house. Inside, Grisha’s journals revealed the horrifying truth: humanity was not extinct. Across the ocean, a whole world existed, and the Eldians behind the Walls were not a remnant of mankind but an oppressed race being systematically purged by Marley through Titan injections. Paradis was a prison, and the Warriors were children brainwashed into believing their actions were righteous. This basement revelation fundamentally shifted the series’ moral center, recasting the Titans from monsters into a tragic bioweapon. A full timeline of the Marley-Eldia conflict is detailed at the Great Titan War page.

The Marleyan War and the Raid on Liberio

After learning the truth, the Survey Corps reached the ocean—a symbolic moment of temporary triumph. But rather than celebrating, Eren stared at the horizon and asked, “If we kill our enemies across the sea, will we finally be free?” The narrative then jumped four years ahead, following the perspective of the Warrior candidates in Marley. This shift humanized the former villains, showing Reiner’s PTSD, Falco’s naivety, and Gabi’s indoctrinated fanaticism. Marley, meanwhile, was losing its military edge as other nations developed anti-Titan weaponry, pushing its leadership to seek the Founding Titan on Paradis.

Eren, having gone rogue and infiltrated the Liberio internment zone under the alias “Kruger,” coordinated a devastating attack. During the Liberio festival, he transformed and consumed the War Hammer Titan—the Tybur family’s hidden weapon—while the Survey Corps provided support. The raid resulted in mass civilian casualties and the death of Marley’s top brass, but it also cemented Eren’s transformation into a figure who would stop at nothing to secure Paradis’s survival. Willy Tybur’s dramatic speech, which declared war on Paradis, can be seen as the moment that locked both sides into mutual annihilation. More about this pivotal arc is explored at MyAnimeList’s Final Season page.

The Rumbling and the Final Battle

Eren’s true plan, however, was far more absolute than anyone imagined. By making contact with his half-brother Zeke Yeager (the Beast Titan) through the royal bloodline, Eren gained access to the full power of the Founding Titan without being bound by the vow renouncing war. Instead of a limited strike, he unleashed the Wall Titans—millions of Colossal forms that flattened the earth in a cataclysmic event known as the Rumbling. His stated goal: to exterminate all life beyond Paradis, ensuring that the island would never again be threatened or hated. The anime’s final episodes follow the Alliance—a coalition of former Survey Corps members, Marleyan Warriors, and even Titan shifters—who must confront their former friend turned apocalyptic force.

The final battle at Fort Salta sees Mikasa, Armin, Levi, Reiner, Pieck, Annie, and Falco fight against a monstrous Founding Titan form that defies all reason. Inside the Paths realm, the spirit of Ymir Fritz observes the conflict, her millennia of servitude approaching a resolution. Mikasa’s climactic choice—to kill Eren with love—finally convinces Ymir to let go of her attachment to King Fritz, ending the power of the Titans forever. The Rumbling stops at 80 percent of the world’s population destroyed, and the remaining world grapples with the horror and the chance for a fragile peace. For a character-by-character breakdown of the final arc, the Wikipedia character list offers solid reference material.

The Legacy of Attack on Titan

In the epilogue, time jumps forward centuries. Paradis, forced to accept its place in a devastated world, eventually faces the consequences of its own militarization and is bombed into ruins. Yet the cycle of renewal persists. A lone child, dressed like a wanderer, approaches the tree where Eren’s head was buried—now grown into a colossal form reminiscent of the one that once housed the source of all Titans. The implication is clear: the potential for another Titan-like power may one day resurface, and with it, the eternal human questions of power, freedom, and cruelty.

The timeline of Attack on Titan is not just a sequence of battles; it is a meditation on the cost of survival. Each arc peels back another layer of moral ambiguity, from the mindless Titans of Shiganshina to the child soldiers of Marley, and finally to the ordinary people crushed by the Rumbling. Hajime Isayama’s story challenges the viewer to examine their own biases, reminding us that every hero in one narrative can be a monster in another. The evolution of the fight against Titans, therefore, mirrors the evolution of humanity’s own struggle with hatred—and the terrifying realization that some chains can only be broken by passing them on.