One Piece I Transmigrated into Marco

A young man woke up in the body of Marco, the Phoenix of the Whitebeard Pirates… and right before the Marineford War. Death and chaos would soon surround him, but he remembered everything—the story, the outcome, and the countless paths that led to ruin. In the original timeline, Marineford was a dead end, a tragedy that could not be avoided… but now, armed with a mysterious stat-boosting system and knowledge of the future, he had a chance to rewrite fate itself. You're about to witness a man change his fate and that of his crew. — Description from novelcodex.org