Two Worlds, One Title: Understanding the Fullmetal Alchemist Adaptations

Few anime franchises have sparked as much debate among fans as Fullmetal Alchemist. Hiromu Arakawa’s manga, serialized from 2001 to 2010, birthed two distinct television adaptations: the 2003 Fullmetal Alchemist and the 2009 Fullmetal Alchemist: Brotherhood. While both follow brothers Edward and Alphonse Elric on their quest to regain their bodies after a botched human transmutation, the stories they tell diverge in profound ways. Understanding the chronological order of events in each version—and why they unfold as they do—unlocks a deeper appreciation for the franchise’s ambition.

The Source Material and the Split Path

Hiromu Arakawa’s manga, published in Monthly Shōnen Gangan, is a tightly plotted epic spanning 27 volumes. When the first anime was greenlit in 2003, only about a quarter of the manga had been released. The production team, with Arakawa’s blessing, crafted an original second half that gave the series its own identity. Brotherhood, produced after the manga ended, adapts Arakawa’s full story with near-perfect fidelity. This fundamental timeline of creation directly shaped how each version sequences events.

To view the source material firsthand, you can explore the official English release through Viz Media’s Fullmetal Alchemist page. The manga’s consistent serialization contrasts sharply with the diverging timelines of the anime, and that contrast is the key to every difference.

Chronological Breakdown: Fullmetal Alchemist (2003) Story Arcs

The 2003 series takes the manga’s early chapters and expands them with original episodes, then builds an entirely new mythology. Chronologically, the major arcs flow like this:

  • Lior and the False Prophet — The Elrics confront Cornello in the desert city of Lior, exposing miracles as alchemy and encountering the word “Homunculus” for the first time.
  • The State Alchemist Exam — Edward becomes a State Alchemist; the brothers encounter Shou Tucker’s horrific experiment, a storyline that gains extended emotional weight in this adaptation.
  • The Homunculi Emerge — Wrath is introduced as a child-like Homunculus, Lust and Gluttony become recurring threats, and the Homunculi’s origin is tied directly to failed human transmutations.
  • Philosopher’s Stone Pursuit — The chase for the Stone leads to the laboratory 5 incident, where Ed and Al uncover the secret ingredient—human lives—far earlier than in Brotherhood.
  • The Ishbalan Flashback (early) — The series places Roy Mustang’s Ishbal war trauma and Scar’s backstory earlier, weaving them into the main narrative to serve the anime-original plot.
  • Dante and the Gate’s Truth — Dante is introduced as a manipulative alchemist who has been orchestrating events for centuries. The Gate is revealed as a passage to a parallel world, fundamentally altering the story’s metaphysics.
  • Ed’s Final Choice — The climax sees Edward sacrifice his own existence to restore Alphonse, sending him to a parallel world (our real-world London, 1921) while Al remains in Amestris with his body restored.

Chronological Breakdown: Fullmetal Alchemist: Brotherhood Story Arcs

Brotherhood follows the manga’s timeline with a faster early pace and far more intricate late-game plotting. The chronological order is:

  • Lior and the Liore Resurgence — The series opens with the same Cornello confrontation, but quickly moves to Liore’s destruction and Rose’s later rallying of her people, a storyline that reverberates through the entire series.
  • State Alchemist and the Tucker Tragedy — The Shou Tucker and Nina sequence is compressed, leaving more room for later arcs. Ed earns his silver pocket watch.
  • Scar’s Warpath and Ishbal — Scar’s serial killing of State Alchemists and the full Ishbalan genocide flashbacks are given extensive treatment later, around the midpoint, forming an emotional backbone.
  • The Homunculi’s True Nature — Each Homunculus is revealed to embody a specific sin and is a fragment of Father’s essence. Their origin as the purified sins removed from Father’s being ties directly to the countrywide transmutation circle.
  • The Promised Day — The sprawling narrative converges on a single day when Father plans to sacrifice every Amestrian to become a new god. The preparation, from the mining tunnels in Briggs to the eclipse, unfolds over dozens of episodes.
  • Father’s Final Form and the Counterattack — The climactic battle involves the combined military forces, Xingese allies, and the Homunculi turning against each other. Ed sacrifices his alchemy to rescue Al, rejecting the Gate altogether.
  • Epilogue — The ending shows the brothers rebuilt, the nationwide recovery, and Ed and Winry’s future together, exactly as the manga concluded.

Where the Timelines First Split

The most critical chronological divergence happens after the laboratory 5 incident. In the 2003 version, the incident occurs around episode 20 and leads directly into a confrontation with the Homunculi that introduces Wrath and redefines Sloth. Brotherhood dispatches with the same event by episode 11, using it to plant seeds about the Philosopher’s Stone’s composition before the story rockets toward the second Greed arc and the northern wall of Briggs. This single structural difference—whether the middle act is spent chasing the Stone’s creator or building a war against Father—defines each series’ genre identity.

Character Evolution Across the Two Timelines

Because each series rearranges when characters appear and how deeply they are explored, attachments shift dramatically between versions.

Edward and Alphonse Elric

In the 2003 series, Edward’s journey is more solitary and tragic; he is forced to kill Wrath, his own creation, and ultimately leaves Amestris entirely. His arc is one of loss and severance. Brotherhood’s Ed, in contrast, learns to rely on an ever-growing web of allies—from the Xingese prince Ling to members of the Briggs garrison—and his final act is one of collective effort culminating in a personal, but not isolating, sacrifice.

Roy Mustang

The 2003 adaptation draws Mustang’s ambition forward early, showing him scheming to become Führer and then confronting the consequences when he assassinates the real Führer Bradley. Brotherhood delays Mustang’s full arc until the Promised Day, where his blinding by Envy—and the subsequent temptation for revenge—becomes a defining moment that pays off his character’s seven-year development. Both are powerful, but the chronological placement changes whether he appears as a political operator or a wartime leader first.

The Homunculi

In the 2003 timeline, the Homunculi are failed human transmutations animated by rage and unresolved emotion; Wrath is Izumi’s lost son, Sloth is the Elrics’ mother, and their connection to Dante provides a personal, intimate horror. Brotherhood’s Homunculi are theological constructs, embodying Father’s discarded sins and functioning as agents in a centuries-long alchemical ritual. This origin change shifts them from tragic figures to awe-inspiring antagonists, with Wrath (Bradley) being a particularly chilling product of selective breeding rather than transmutation.

Scar and the Ishbalan Tragedy

The 2003 series integrates Ishbal early but reserves the full genocide exploration for its own timeframe. Brotherhood positions Ishbal’s history as the linchpin of its thematic arc, with a multi-episode flashback arc (episodes 30-31) that recontextualizes every major soldier’s guilt. Scar’s redemptive journey from murderer to protector of Ed’s group is meticulously built over 64 episodes, becoming one of the strongest arcs in either version.

Thematic Resonance: Parallel Worlds vs. One World

The 2003 series ends with the revelation that alchemy’s energy is drawn from deaths in a parallel world—our world—during World War I. This consequence-laden twist frames alchemy as inherently parasitic, a theme that saturates the entire back half of the series. Redemption means severing oneself from that cycle entirely, which is why Ed ends up in 1920s London, separated from his brother.

Brotherhood’s equivalent thematic climax is the Gate sequence, where Ed realizes that the bonds of community and the resilience of the human spirit are the “philosopher’s stone” he needed all along. Sacrifice remains central, but the series argues that true sacrifice isn’t about giving up something massive in a single dramatic gesture; it’s about the daily, humble exchanges that build a life. The chronological placement of these realizations—at the very end of the journey—makes the epilogue feel earned and concrete, not bittersweet and ambiguous.

Supporting Cast and Story Density

One practical difference dictated by chronology is how many characters each adaptation can develop. The 2003 series, with its shorter 51 episodes, focuses heavily on the central trio of Ed, Al, and Mustang. Brotherhood’s 64 episodes, backed by the completed manga’s full roster, give room to the Xingese characters (Ling, Lan Fan, May Chang), the Briggs soldiers (Olivier Mira Armstrong, Buccaneer), and the chimera soldiers who become vital allies on the Promised Day. If you look at episode counts on a resource like Anime News Network’s Brotherhood entry, you’ll see how the pacing allowed for side stories like Hohenheim’s long flashback or the comic relief of episodes 35-37 without derailing the main plot.

Watch Order: Which Chronology First?

Debates over watch order are as old as Brotherhood itself. The chronological release order—2003 then Brotherhood—offers an interesting progression: see a self-contained, darker take first, then appreciate the grander, more hopeful sweep of the manga’s story. However, many argue that watching Brotherhood first spoils nothing of the 2003 original while giving the full intended arc. A hybrid approach that starts with 2003’s early episodes (for extended emotional setup in Lior, Tucker, and Hughes) before switching to Brotherhood around episode 10 can work for some, but it muddies the chronology of each universe.

The most commonly recommended path for newcomers in the modern era is to watch Brotherhood from start to finish, then explore the 2003 version as a fascinating alternate reality. Both adaptations stand alone; neither needs the other to be understood.

Exploring the Differences Further

For those who want to compare scenes side-by-side, the Crunchyroll page for Brotherhood provides easy access to the official stream, while physical editions often include commentary that illuminates those adaptation decisions. The original 2003 series, while less available digitally in some regions, remains on many home video collections and is worth revisiting for its beautifully melancholic score and unique perspective on Arakawa’s world.

The Enduring Legacy of Two Chronologies

The existence of two distinct chronological orders for the same core story is a testament to the strength of the original premise. Arakawa’s world is flexible enough to support both a tight, character-driven tragedy and a sprawling war epic. Understanding Fullmetal Alchemist chronologically means recognizing that the truth changes depending on which gate you walk through, but the law of equivalent exchange remains the same: to gain something, something of equal value must be given. In 2003, that something was an entire world. In Brotherhood, it was the heart of a story that had been waiting to be told completely.

Whichever order you choose, the journey of two brothers who dared to challenge the laws of existence continues to resonate because it never forgets the human cost of ambition—a truth that transcends any timeline.