Introduction: A Bold Maneuver

In the ever-expanding universe of One Piece, the probability of characters taking different paths can lead to drastically altered storylines. What if Luffy, Ace, and Sabo had joined the Marines instead of their current fates? This alternative history explores how their choices might have revolutionized the world and the narrative of the series.

The Impact on Luffy's Journey

Luffy, the protagonist of One Piece, would have taken a very different path if raised directly under the care of Garp and placed at Marine HQ. Unlike his current chaotic adventures, he would have been sent to the HQ to handle missions such as hunting down pirates and protecting royalty. This move would have kept him away from the East Blue and Paradise, preventing any dramatic encounters there. However, this strict military upbringing would have also ensured that Usopp would not have been a part of Luffy's team, potentially eliminating a valuable ally and source of humor.

The Strength and Leadership of Ace and Sabo

Ace and Sabo, both powerful members of the Straw Hat Pirates, would have played a pivotal role in their new lives. Had Ace joined the Marines, he might still have lived, although the outcome for Luffy could have been different. With Sabo also under Marine jurisdiction, they would have been able to rescue each other more quickly, reducing the severity of Ace's injuries and the strain on Law. Sabo's cool-headed nature would have provided a stabilizing influence, keeping Ace from falling into the trap set by Akainu. The alliance to kill the emperor in Dressrosa might never have formed, altering the course of the festival completely.

The Loss of Supporting Characters

Under this alternate timeline, many supporting characters would have fared poorly. Usopp, for instance, would have lost his life, either at the hands of Kuromi if he were in the way, or through a tragic accident. Nami would remain in the clutches of Arlong for an extended period until Dragon arrived to free her, as the marines would not have a reason to send a strong enough force to a remote island. Buggy would continue his perverted ways, and there's a chance he might murder Nami once he realizes she is not as evil as he thought. Zoro would have fought against Morgan, possibly escaping but still drawing attention from other Marine captains. Chopper would have remained under the influence of Wapol, who would have prevented him from ever rising to prominence. Teach would continue to attack Wapol's stronghold, and eventually, both would be defeated, turning Alabasta into a hellhole.

The Fate of Key Figures

Dragon, upon learning that his son was rising in the marines, would have experienced a mix of pride and sorrow, knowing that he might have to face his own son one day. Sabo would also share this emotional turmoil. Due to Luffy's fierce personality and disrespect for authority, he would likely face demotions or even be placed in the brig multiple times. The storyline involving Moria would have been very different, with Moria continuing to chill on his island until he received a call to fight as a warlord again. Given his past, he would not have fared well against Kaido, leading to his death. Robin would continue her search for poneglyphs with Crocodile, while Franky would have ended up in Impel Down. Skypiea's Enel would have succeeded in his plan, and Doflamingo would have maintained his control over Dressrosa, likely crushing any rebellion headed by Law. Hody Jones would have continued his efforts to take over Fishman Island, and Sanji would remain a mere kitchen worker until the conflict between Mihawk and Krieg for Mihawk's successor.

The Impact on the Grand Arc

The climb to Admiral position would have seen significant changes. Marine Ace, with his potential to learn Haki and Rokushiki, would have quickly become a contender for Admiral once Sengoku retired. His early access to these powerful abilities and a Logia Fruit would have made him comparable to Akainu and Kuzan but at a younger age. This would have left Issho and Green Bull without the opportunity to claim the positions, and Law would have been killed by Doflamingo, allowing Caesar, Doflamingo, and Kaido to continue their operations without interference.

Conclusion

This alternative timeline presents a different narrative for One Piece, with Luffy, Ace, and Sabo taking on a more structured and serious path. While it offers a unique perspective on the series, it also highlights the importance of randomness and chance in the overall storyline. In the end, the choices made by the characters determine the shape of the world we know and love.