Marines are harbingers of justice, roaming the seas to bring criminals to justice and save the innocent. They have been at the forefront of the fight against pirates for centuries, and it is thanks to their hard work that the world has not been overrun by criminals. There are various ranks in the Marine Corps and are awarded based on individual experience and accomplishments.
The position of Admiral is one of the most prestigious, and at one time only three people were able to hold it. They are said to be the world's strongest military force and are incredibly powerful. That said, the Admiral is not invincible. With that in mind, here are some One Piece characters strong enough to defeat the Admiral.

One Piece: 7 Bjornkos are stronger than Luffy, rankings
Luffy has the strongest Devil Fruit and Haki abilities in the story, but here are 5 characters who are still stronger than him!
9
Silvers Reilly
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The Pirate King's Right Hand
Rayleigh is one of the most important characters in the entire series. He is the one who taught Luffy how to use different types of Haki. Naturally, Rayleigh is a Haki Master capable of using advanced forms, a feat only achieved by a few people. His power was recognized by everyone, even Blackbeard refused to fight him. Rayleigh already fought Kizaru in Sabodi, and Kizaru admitted that he could not defeat the Dark Lord.
8
Sengoku
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former naval admiral
Sengoku is a man of good reputation who has been in the Navy for a long time. He was praised by colleagues and enemies for his strength and tactical genius. It was his direction that helped the Marines achieve victory during the Battle of Marineford. He possesses the extremely rare mythical Zoan Devil Fruit, which allows him to transform into a golden Buddha. It also grants him shock-based powers that can rival Kuraguranomi.

Ranking of the 9 strongest pirates who are not Yonko from One Piece
Yonko is powerful, but he's not the only powerful pirate in One Piece.
7
Dracula Mihawk
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The world's strongest swordsman
Mihawk is a member of the Cross Guild and one of the most powerful characters in the world. He is a strong man who has fought people like Shanks. Aside from a brief battle with Vista, Mihawk hasn't been in an all-out war for a long time. Despite his lack of achievements, Mihawk remains the world's greatest swordsman, with his skills with a sword unmatched.
6
Gorosei
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Immu's most trusted subordinates
These five men hold the second highest authority in world government. They dictate what happens around the world. Gorosei has been portrayed as a non-combatant, but that couldn't be further from the truth. In reality, they are monsters with powers comparable to natural disasters. They all have devil fruit powers that allow them to transform into mythical beasts. Plus, they are powerful Haki users, which makes them even scarier.

One Piece: The 6 strongest marines of the old generation, rankings
The new generation of marines are strong, but they cannot compare to the old generation legends of One Piece.
5
Imu
Imu was once a mysterious character, but not anymore. His reveal made it clear that Imu currently possesses power unmatched by anyone else in the world. During the Elbaph arc, Imu made her first appearance and ruined Luffy and his friends' plans in just a few seconds. Even Loki was unable to harm Imu, which shows Imu's incredible strength.
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4
sakazuki
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naval fleet commander
Akainu is a fervent believer in absolute justice, and it is no exaggeration to say that he is the bane of every pirate. In his eyes, anyone who stands in the way of justice is evil and must be eradicated from the world. He has crazy devil fruit and Haki. Both of these abilities helped him defeat Aokiji in a ten-day battle.
3
rocky
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Prince of Cursed Elbaf
Elbaph introduced Loki, the heir to Harald's throne, one of the most powerful characters in the entire series. In a short amount of time, Loki has demonstrated some of the most outrageous feats in One Piece. For example, I was able to defeat Harald, who received a large power-up from Imu. In the latest chapter, Loki fights Imu directly and gives him a pretty good fight.
2
scooper bag
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The Pirate King's Left Hand
Gaban is a former member of Roger Pirates. He is one of the most powerful pirates in existence. In fact, he is said to be equal in strength to Rayleigh. Gavan showed his strength by easily defeating Shin Knight. Since he doesn't have a devil fruit, he mainly fights using Haki. Considering how Rayleigh was able to beat Kizaru, there's no doubt that Gaban can do the same.
1
Monkey D. Garp
Garp may be a lieutenant general in the Marine Corps, but that doesn't mean he's the most powerful Marine of all time. He doesn't have a devil fruit, but that hasn't stopped him from becoming the strongest. Garp has trained his Haki to such a high level that even a simple punch is filled with enough destructive power to level an island with a single strike. Moreover, Garp was powerful enough to face Aokiji, and was defeated due to the intervention of the Blackbeard Pirates.
- release date
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October 20, 1999
- network
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Fuji TV
- move
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Hiroaki Miyamoto, Konosuke Uda, Junji Shimizu, Satoshi Ito, Munehisa Sakai, Katsumi Tokoro, Yutaka Nakajima, Yoshihiro Ueda, Kenichi Takeshita, Yoko Ikeda, Ryota Nakamura, Hiroyuki Kakudo, Takahiro Imamura, Toshihiro Maeya, Yuji Endo, Nozomu Shishido, Hidehiko Kadota, Sumio Watanabe, Harume Kosaka, Yasuhiro Tanabe, Yukihiko Nakao, Keisuke Onishi, Junichi Fujise, Hiroyuki Sato
- author
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Jin Tanaka, Akiko Inoue, Junki Takegami, Shinzo Fujita, Shoji Yonemura, Yoshiyuki Suga, Atsuhiro Tomioka, Hirohiko Uesaka, Michiru Shimada, Isao Murayama, Takuya Masumoto, Yoichi Takahashi, Momoka Toyoda.
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Mayumi Tanaka
Monkey D. Luffy (voice)
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Kazuya Nakai
Roronoa Zoro (voice)