One Piece, Volume 57 by Eiichiro Oda

The volume plunges into the climactic, chaotic naval battle at Marineford as the young captain and his allies storm the stronghold to rescue his captured brother. Fierce clashes between pirate legends and imperial forces, along with desperate sacrifices and a brutal betrayal, tear through the battlefield; a heartbreaking sacrifice to protect the captain and the fall of a titanic figure irrevocably alter the balance of power. The story ends on a stunned, grief-stricken aftermath that forces the protagonist and the world around him to reckon with the terrible cost of the conflict and sets the stage for the next chapter of their journey.

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