The One Piece world is a living chronicle spanning more than 900 years of recorded history, with each island, faction, and character contributing to a timeline that reshapes itself with every new revelation. For readers following Eiichiro Oda’s saga, the sequence of events is not mere background—it is the engine that drives the Straw Hat Pirates toward the final island. The Reverie and Wano Country arcs represent two of the most ambitious storytelling pillars in the series’ second half, and understanding how they lock into the larger chronology reveals the scale of the final saga. This expanded analysis traces the timeline that binds the world, dissects the political earthquake of the Reverie, and explains how Wano’s closed-country tragedy becomes the flashpoint for world-changing upheaval.

The One Piece World Timeline: A Layered Chronology

The series timeline splits naturally into two vast eras: the Void Century and the post-Void Century world order, often called the World Government era. The Void Century (circa 900 to 800 years before the current story) remains the great unknown, deliberately erased by the World Government to hide the true history of the Ancient Kingdom, the Great Kingdom’s allies, and the creation of the Poneglyphs. What we know comes from indestructible stone blocks and the oral traditions of isolated islands like Wano and Ohara. That erased century connects directly to the ancient weapons—Pluton, Poseidon, and Uranus—and the figure of Joy Boy, a pivotal individual from the Ancient Kingdom who made a promise to the mermaid princess of Fish-Man Island, a promise inscribed on the Poneglyph inside the Sea Forest.

Following the Void Century, the World Government formed an alliance of twenty kings who relocated to the holy land of Mary Geoise, creating the system of the Celestial Dragons and the Seven Warlords of the Sea, the Marine Headquarters, and the Four Emperors. This post-Void Century timeline is subdivided into smaller recognizable periods: the era of the Pirate King Gol D. Roger, the Great Age of Pirates that his execution ignited, and the current era of the Worst Generation. Within this framework, the Reverie—a global political summit that convenes only once every four years—and the Wano Country arc, a sprawling war for the liberation of a closed nation, become two sequential but interconnected historical milestones.

The Reverie Arc: The World’s Political Chessboard Shifts

The Reverie arc, which unfolds in the Levely chapters of the manga, is not a traditional action arc. It is a council of kings and queens, a gathering of the fifty royal families affiliated with the World Government. Taking place in Mary Geoise soon after the Whole Cake Island escapade, this arc runs parallel to the Straw Hats’ journey to Wano. Despite its dialogue-heavy nature, the Reverie is a turning point that redefines alliances, exposes hidden truths, and lays the diplomatic groundwork for the wars to come.

Why the Reverie Matters to the Timeline

Every four years, the Reverie convenes to discuss global threats, renegotiate treaties, and deliberate on the actions of pirates that threaten the balance of power. For the first time, however, the world had an unprecedented confluence of events: the Straw Hat Pirates had dismantled two Warlords, assaulted Enies Lobby, broken into Impel Down, and declared war on the World Government at Marineford. At the same time, the Revolutionary Army led by Monkey D. Dragon had grown bold enough to declare total war on the Celestial Dragons. The Reverie became the stage where the old order, represented by the Five Elders and the mysterious sovereign Im, would respond to these simultaneous crises.

What makes the Reverie arc essential reading for chronology is that it condenses decades of political tensions into a few days. Characters who had only been names in bounty posters—King Cobra of Alabasta, King Riku of Dressrosa, Queen Otohime’s legacy through her children—finally step forward with agency. Their decisions during this summit echo directly into Wano.

Key Revelations That Redrew the Map

  • The empty throne and Im’s existence: The revelation that a secret monarch sits upon the world’s symbolic empty throne upends the World Government’s founding myth. The Five Elders bow before Im, who orders “lights to be extinguished,” targeting specific individuals. This shows that the Reverie is not a democratic assembly but a cover for an ancient, authoritarian lineage.
  • The alliance to abolish the Warlord system: Kings Cobra and Riku push for the dissolution of the Seven Warlords of the Sea, citing the destruction caused by Crocodile and Doflamingo. When the vote passes, the balance of power among the Three Great Powers collapses, forcing the Marines to restructure their forces, and directly altering the chessboard for the Wano conflict—Marine resources are stretched, and former Warlords now become independent threats.
  • Shirahoshi and the ancient weapon Poseidon: Shirahoshi’s attendance unwittingly places the reincarnated Poseidon at the center of world politics. The conversation between King Neptune and the Five Elders, coupled with Im’s picture of Shirahoshi alongside Luffy and Blackbeard, suggests that the ancient weapons are not forgotten relics but active pieces about to be deployed. The connection to the Wano Poneglyphs and the Road Poneglyphs becomes inescapable.

These cascading developments mean that by the time the Straw Hats land on Wano, the global environment outside the closed country has already been reshaped. Alliances that will later supply the Wano war effort—such as the Revolutionary Army’s movement—are already in motion because of Reverie decisions.

The most important narrative thread running from the Reverie to Wano involves the Revolutionary Army’s commanders. Sabo, Lindbergh, Karasu, and Morley infiltrate Mary Geoise to rescue Bartholomew Kuma and to declare war. During their operation, Sabo witnesses Im on the empty throne and learns about the secret that ties the World Government to the Ancient Kingdom. The news he tries to transmit, the clash with Fujitora and Ryokugyu, and the subsequent headlines about Sabo’s alleged murder—or capture—create outrage that shakes the world. This event fuels the flames of rebellion across the Blues and gives the Wano alliance a psychological boost: they are not fighting in isolation but as part of a global uprising against the same oppressive system that created Kaido’s weapons factories. The Reverie arc thus positions the Wano arc as the armed manifestation of a worldwide ideological conflict.

The Wano Country Arc: A Closed Nation’s Place in History

Wano Country is not just another island; it is a living museum of the world’s forgotten past. Geographically isolated by treacherous seas and steep cliffs, Wano preserved traditions, architecture, and a social hierarchy strikingly similar to Edo-period Japan. But its timeline importance runs far deeper: Wano is the source of the Poneglyphs, the stonemasonry that outlasted empires. The Kozuki clan, ancestors of Momonosuke, created the indestructible stones that hold the true history, making Wano the birthplace of the very records the World Government fears most.

Wano’s Chronological Layers

To understand Wano’s arc, one must see it not as a single rebellion but as the collision of three temporal layers:

  • The Ancient Layer (Void Century): The Kozuki family forged the Poneglyphs in partnership with the Ancient Kingdom. They encoded the history of the Great Kingdom and the instructions for the ancient weapons on these stones. The betrayal of the twenty kings and the formation of the World Government severed Wano’s connection to the outside world, but the Kozuki continued to pass down the secret of reading Poneglyphs through their bloodline. The indestructible Road Poneglyphs—essential for locating Laugh Tale—were crafted here, and one still resides on Wano, guarded by the Beast Pirates in the Flower Capital’s basement.
  • The Kozuki Downfall Layer (20 years ago): Kaido’s arrival, his alliance with the shogun Kurozumi Orochi, and the betrayal that led to the execution of Kozuki Oden mark the darkest period in Wano’s recorded history. Oden’s legendary journey with Whitebeard and Roger, his discovery of the truth of the world on Laugh Tale, and his return to open Wano’s borders make him the linchpin connecting the current era to the golden age of piracy. The twenty-year prophecy delivered by Toki, Oden’s wife, sets a precise countdown: the Scabbards will return, and the dawn will break. That prophecy triggers the arrival of the Straw Hats right on schedule.
  • The Present Layer (Raid on Onigashima): The alliance of the Straw Hats, Heart Pirates, Kid Pirates, the Mink Tribe, and the rebel samurai converges to overthrow Kaido and Big Mom. This is not simply a rescue mission for Wano; it is the fulfillment of Oden’s will and the ignition of the world war the Reverie foreshadowed. Luffy’s awakening of the Gomu Gomu no Mi’s true nature—the Hito Hito no Mi, Model: Nika—ties directly to Joy Boy, the figure from the Void Century who promised liberation. In that moment, Wano becomes the stage where the ancient Sun God returns, and the drums of liberation echo out of the isolated country for the first time in eight hundred years.

How Wano’s Events Reshape the World Timeline

The fall of Kaido and Big Mom, the rise of the new shogun Momonosuke, and the opening of Wano’s borders are historical events that register worldwide. Big News Morgans spreads the word that the “New Emperors” include Monkey D. Luffy and Buggy, while the defeat of two Yonko dismantles the decades-old balance of power. The Marines, now stretched thin by the dissolution of the Warlord system, launch a new weapon—the Seraphim—and scramble to contain the chaos. The bounties and titles redefined at the end of Wano directly set up the final race for the One Piece and the inevitable conflict with the World Government.

Furthermore, the Poneglyph information obtained by Robin—particularly the Road Poneglyphs and the messages from Joy Boy—connect Wano to the lost history in a way that makes Mary Geoise’s rulers increasingly desperate. The ancient weapon Pluton, confirmed to be sleeping beneath Wano, adds a military dimension that terrifies the World Government. The moment Wano opens its borders, Pluton can be unleashed. The Reverie’s decisions to extinguish certain lights, including possibly Vivi and Sabo, now intersect with Wano’s revelation that Pluton still exists and that its guardian is Momonosuke, the shogun who commands Zunesha.

The Interweaving of Reverie and Wano: A Dual Narrative That Sets the Endgame

On the surface, the Reverie is a talk-heavy political summit and Wano is a grand war for liberation, but they are twin halves of the same story. The Reverie plants the ideological seeds—the Revolutionary Army’s declaration of war, the dissolution of the Warlord system, the exposure of Im’s existence—while Wano waters those seeds with world-shaking battles. The alliances formed inside Mary Geoise grant moral legitimacy to the samurai rebellion; the news of Sabo’s actions emboldens the people of Wano to fight back, knowing they are part of a larger global movement.

Character Growth Across Both Arcs

Luffy’s journey through Wano crystallizes his transformation from a reckless rookie into a warrior who carries the will of Joy Boy. But his development is not isolated. During the Reverie, his actions in Dressrosa and Fish-Man Island are debated by world leaders, elevating his status from a local troublemaker to a planetary symbol of liberation. The bountiful honor of being called “Fifth Emperor” after Whole Cake Island, which was discussed at Reverie, is no empty title—it signals that the world now sees the Straw Hats as a force that can challenge the existing order.

Sanji’s arc in Wano and his earlier encounter with his Germa family during Whole Cake Island resonate with the Reverie’s themes of dynastic legacy and the corruption of noble bloodlines. Sanji’s rejection of his Germa heritage mirrors the kings who stand up at the Reverie to condemn the Celestial Dragons. Nami’s growth, too, is forged in the fires of Wano’s slavery, as she confronts the economic oppression inflicted by Kaido and Orochi, a miniature version of the global tyranny the Revolutionary Army fights.

The Ancient Weapons Awaken

Both arcs sharpen the focus on the ancient weapons. At the Reverie, Shirahoshi’s identity as Poseidon is nearly compromised, and the World Government begins to view her as a threat to be eliminated. In Wano, the presence of Pluton is confirmed, and the Kozuki clan’s responsibility to guard it becomes a rallying cry. The third weapon, Uranus, remains mysterious, but the converging events suggest that all three will be activated before Luffy reaches Laugh Tale. The Reverie’s political maneuvering and Wano’s military upheaval are, in effect, the prelude to the ancient weapons’ reawakening and the world war that Joy Boy once promised.

The Larger Narrative: From Closed Borders to a World United

One Piece’s grand chronology is not linear but cyclical: the Void Century repeats itself as the present era approaches another great war. The Reverie and Wano are not mere arcs; they are the twin engines that accelerate the narrative toward its end. Wano’s closed borders, finally opened, mirror the isolationist policies the World Government forced upon the seas to hide the truth. When the borders fall, the flow of information, Poneglyph knowledge, and the will of D. flood the world. The Reverie showed the cracks in the World Government’s façade; Wano tears the whole wall down.

History in the One Piece world is not a passive backdrop. It is a weapon wielded by those who control information, and a liberating force when the true record is restored. The Reverie arc and the Wano Country arc are carefully positioned to reveal that the greatest battles are not fought with fists alone but with ideas, memories, and long-suppressed histories. As the Straw Hats now sail toward Elbaf and the final Road Poneglyph, the seeds planted in Mary Geoise and the sacrifices made in Onigashima will bloom into a confrontation with Im and the entire World Government. The chronology of these arcs assures that when Luffy finally finds the One Piece, he will be standing on the shoulders of eight centuries of silenced voices—and the world, finally, will hear them.

For those who want to trace every event across the eras, the One Piece Timeline on the wiki offers a comprehensive breakdown, while Eiichiro Oda’s public statements, compiled on Shonen Jump’s official site, provide additional context for arc connections. Few long-running series weave chronology so tightly into character and theme, and these two arcs prove that every council meeting and every samurai clash is a note in a symphony that has been playing since the world’s dawn.