Certainly. I will explain the events from the "Promised Day" in the original Fullmetal Alchemist manga, covering the final confrontation with Father and the conclusion for Ed and Al, following the chronological order. ※ Major spoilers for the finale follow. ① The "Promised Day" Begins The Homunculi complete a massive transmutation circle spanning all of Amestris and prepare to execute their plan on the "Promised Day." Father's goal is to use the souls of every human in Amestris to activate the Nationwide Transmutation Circle. To achieve this, he requires the "Five Human Sacrifices": ・Edward Elric ・Alphonse Elric ・Roy Mustang ・Van Hohenheim ・Izumi Curtis Meanwhile, Ed and his allies head toward Central from different locations to stop Father's plan. ② Total War in Central On the Promised Day, the military high command in Central begins to move. However, many within the military are actually cooperating with the Homunculi. Thus, the Mustang Unit, the Briggs Soldiers, Ed's group, and Scar's group join forces to fight the Central military. The Briggs soldiers, in particular, prove incredibly strong as they launch an assault on Central Command. ③ Bradley Returns King Bradley, the Homunculus Wrath, appears on the scene. Bradley was thought to have died when Greed and his allies blew up his train. However, he survived and returns to Central, displaying even more terrifying combat prowess than before. Greed, Fu, and Buccaneer clash with Bradley. Fu and Buccaneer fight to stop Bradley, eventually sacrificing their lives to halt his movements. Greed also battles Bradley. Ultimately, Scar faces Bradley in a one-on-one duel. Through this fight, Scar chooses to fight not just for the hatred he once held, but carrying his brother's research and the future of the Ishvalan people. Bradley is finally defeated. ④ Roy Mustang's "Sacrifice" This is a crucial part of the final battle. Father needed five sacrifices. To fulfill this, the Homunculi force Roy Mustang to become a "sacrifice." Mustang is forced to open the Gate of Truth and loses his eyesight as the toll for human transmutation. With this, the five sacrifices are gathered. However, Father has no need to kill Mustang; his goal was to use him while he was still alive. ⑤ Father's "Nationwide Transmutation Circle" Activates Finally, Father's plan is executed. The massive transmutation circle spanning all of Amestris activates. The souls of people across the country are sucked up at once and gathered within Father. Through this, Father absorbs the existence he has long sought—"God"—into himself. He becomes an overwhelming entity far removed from humanity. ⑥ Hohenheim's Gambit However, there was a major flaw in Father's plan: Van Hohenheim. Hohenheim carried within him the countless souls lost in Xerxes. Over many years, he had prepared a way to reverse Father's plan. The moment Father steals the souls of the citizens, Hohenheim's trap triggers, returning the stolen souls to their original bodies. In other words, he succeeds in significantly weakening the power Father gained by sacrificing the people of Amestris. From here, the counterattack against Father begins. ⑦ Ed and Allies vs. Father Ed, Al, Izumi, Sig, Scar, and Greed work together to fight Father. Father is incredibly powerful. Beyond alchemical attacks, he uses overwhelming energy to corner Ed and the others. But Ed and his group aren't the only ones fighting. Everyone chips away at Father in their own way. ・Ed ・Al ・Greed ・Scar ・Izumi ・Sig ・Major General Armstrong ・Mustang Unit ・Briggs Soldiers Many individuals combine their strength. ⑧ Greed's End Father still possesses the abilities of the original Greed. However, Greed ultimately sides completely with Ed and the others. Greed cooperates in a plan to use Father's own attacks to deplete Father's Philosopher's Stone. Finally, he says goodbye to Ling. Greed realizes that what he truly wanted all along was "friends." He sacrifices himself to save Ed and the others. ⑨ Alphonse Saves Ed During the battle, Ed loses his right arm. He cannot fight like this. Alphonse uses his own soul as a toll to return Ed's right arm. Al's soul is lost, but thanks to that, Ed can use his right arm again. Knowing Al sacrificed himself to help, Ed fights to the very end. ⑩ Ed vs. Father This is the climax of the final battle. Father still possesses overwhelming power until the end, but he is exhausted from the continuous fighting. Furthermore, he begins to lose control of the power of "God" within him. At that moment, Ed stands up. He fights Father not with alchemy, but with his own fists. Ultimately, Ed's fists strike Father down. Father cannot understand why he is losing. Finally, he is dragged back by the entity known as Truth. Father is completely defeated. Retrieving Alphonse's Body The war is over, but Al has not returned yet. Ed makes his final decision. Ed uses his own "Gate of Truth" itself as the toll to bring Alphonse back. This carries immense significance. Ed chose the answer that he could bring his brother back even without alchemy.
Final Battle
Fullmetal Alchemist
I've tried to include as many world terms from the FMA universe as possible. If anything is missing, please feel free to create it yourself... sorry about that.
Fullmetal Alchemist World Setting Materials
This is a relatively peaceful Amestris timeline focusing on alchemy, the military system, and culture! I've also included the structure of the military uniforms!
Revision
The sun of the Promised Day begins to rise.
Release Date 2026.09.02 / Last Updated 2026.09.03