Marines

The Marines are the World Government's primary military force, tasked with law enforcement, international security, and military operations. The Marines are one of the Three Great Powers in the world, alongside the Shichibukai and the Yonko.

They are present in all the seas around the world, as evidenced by their branch offices. The focus of their assets is on the Grand Line, the most dangerous sea.

The duty of the Marines is to maintain law and order throughout the world and impose the will and might of the World Government.

Marines
The rank structure of the Marine military personnel can be found below.

Commissioned Marine Officers

 * Fleet Admiral (元帥 Gensui)
 * Admiral (大将 Taishō)
 * Vice Admiral (中将 Chūjō)
 * Rear Admiral (少将 Shōshō)
 * Commodore (准将 Junshō)
 * Captain (大佐 Taisa)
 * Commander (中佐 Chūsa)
 * Lieutenant Commander (少佐 Shōsa)
 * Lieutenant (大尉 Taii)
 * Lieutenant Junior Grade (中尉 Chūi)
 * Ensign (少尉 Shōi)

Infantry and Sailor Division

 * Warrant Officer (准尉 Juni)
 * Master Chief Petty Officer (曹長 Sōchō)
 * Chief Petty Officer (軍曹 Gunsō)
 * Petty Officer (伍長 Gochō)
 * Seaman First Class (一等兵 Ittōhei)
 * Seaman Apprentice (二等兵 Nitōhei)
 * Seaman Recruit (三等兵 Santōhei) or Recruit (新兵 Shinpei)
 * Chore Boy (雑用 Zatsuyō) (not an official rank)

This is a list of the various members of Marines at the time of the One Piece DnD Campaign.

Fleet Admiral (元帥 Gensui)

 * Kong - Kong was the Fleet Admiral before Sengoku and is the current Fleet Admiral at the time of the campaign.

Admirals (大将 Taishō)

 * Sengoku - A legendary Marine and the user of the Hito Hito no Mi, Model: Daibutsu. Sengoku was already an Admiral at the time of the execution of Pirate King Gol D. Roger and the imprisonment of Shiki the Golden Lion that preceded it, a year or two before the Crew's journey. He was also still an Admiral during the Ohara Incident, about a year or two after the start of the Crew's journey.

Vice-Admirals (中将 Chūjō)

 * Vice Admiral Arzen - A Vice-Admiral who runs the G-4 Base. He is a mad scientist who seems to have little regard for human life and only seems to value experimenting on living things. Many years ago, he was a Captain working together with V.
 * Vice Admiral Sakazuki - Future Admiral Akainu and future Fleet Admiral. He took part in the Ohara Incident as one of the Vice-Admirals leading the Buster Call.
 * Vice Admiral Kuzan - Future Admiral Aokiji. Like Sakazuki, he was one of the Vice-Admirals leading the Buster Call at Ohara. User of the Logia-type Hie Hie no Mi.
 * Vice Admiral Jaguar D. Saul - A Giant Vice-Admiral, current status unknown
 * Vice Admiral Monkey D. Garp - A legendary Marine Vice-Admiral called "The Fist" and "The Hero of the Marines". He is said to have cornered the Pirate King, Gol D. Roger himself multiple times. He is also the father of a certain dangerous future element.
 * Vice Admiral Tsuru - Dubbed "The Great Staff Officer", Tsuru is an immensely capable Vice-Admiral and a lifelong friend and comrade of Garp and Sengoku.

Rear Admirals (少将 Shōshō)

 * Jefferson - A Rear Admiral who loves firearms. Trevor's superior officer. Has a Justice coat, powdered wig-like hair, two Marine flags coming out of his backpack and a powerful presence. It was stated that he was very close to being promoted to a Vice Admiral prior to his defeat.

Commodores (准将 Junshō)

 * Trevor D. Chapston - Marine Commodore who joined the Marines at a young age in order to get revenge on Boss. He's about as strong as the average Vice Admiral, but lack the rank since he doesn't arrest every pirate he finds.

Captains (大佐 Taisa)

 * Captain Marrow - Marine Captain who found and ate the Bone-Bone Fruit 10 years ago. This Fruit allows him to manipulate the bones in his body. His original name was Arthur. He worked under Commodore Trevor D. Chapston. Currently deceased.
 * Captain Verona - Verona's mother who shares his name. Verona believes that she was involved in the killing of his father. She's known to be cold and prefers machines to people. She was the commanding officer at the Marine Branch on Clown Island.
 * Captain Arzen - A Marine Captain who's obsessed with human experimentation. Worked closely with V and conducted experiments on Rain in the past. Arzen was eventually promoted to the rank of Vice-Admiral.
 * Captain Viridian - Verona's father, a great Marine and was allegedly killed by pirates. Verona believes his mother and Marrow helped kill him.
 * Captain Radical - Blake's undercover disguise as a Marine in G-4.
 * Captain Everest - Cyril's older brother who also has blue hair. Took in Long John Magnum and Stoner.
 * Captain Hastings - A somewhat carefree captain who has ginger hair and a scar across his face, draws to sooth his mind. He found Rain and became her mentor before he was killed by Skendor.

Commanders (中佐 Chūsa)

 * Commander Bait - A Marine Commander who had a shark Zoan fruit (Proposed name: Uo Uo no mi Model Same - Translation: Fish Fish Fruit Model Shark), encountered the Crew while he was searching for Boss, worked under Trevor. Currently deceased.

Lieutenant Commanders (少佐 Shōsa)

 * Unknown

Lieutenants (大尉 Taii)

 * Lieutenant Hubris - A Marine Lieutenant who had a bandana wrapped around messy, orange hair. He fought with a large amount of axes on his back. He was in charge of the the naval units around Miller Island, worked under Captain Marrow. He was shot dead by Verona.
 * Lieutenant Terry - William's Marine alias when the Crew infiltrates G-4.
 * Unnamed Lieutenant - Trevor's Lt. who misplaced the Mizu Mizu no Mi. He was killed by Trevor.
 * Lieutenant Rain - Captain Hastings' right hand and protégé. She was called a prodigy by many due to her rapid growth, as evidenced by her reaching the rank of Lieutenant at the age of 16. Founded the Aeons following her mentor's death, subsequently becoming the figure known as the All Mother.

Lieutenant Junior Grades (中尉 Chūi)

 * Unknown

Ensigns (少尉 Shōi)

 * Ensign (Officer) Jenny - Pearl's Marine alias when the Crew infiltrated G-4.

Warrant Officers (准尉 Juni)

 * Cyril - A young, physically weak Marine, who has lisp. He had one of his arms ripped off by Vice Admiral Arzen and was promoted for eating the Logia-type Mizu Mizu No Mi. Defected and joined the Devil's Luck Pirates.

Master Chief Petty Officers (曹長 Sōchō)

 * Unknown

Chief Petty Officers (軍曹 Gunsō)

 * Unknown

Petty Officers (伍長 Gochō)

 * Old Man - A Petty Officer who is 80 years old and has been in the Marines for 60 years. He seems to not fear death from Captain Verona, his superior.

Seaman First Class (一等兵 Ittōhei)

 * Cyril - A young marine with a weak and feeble body, but a strong sense of justice. Promoted to Warrant Officer.

Seamen Apprentices (二等兵 Nitōhei)

 * Unknown

Seaman Recruits (三等兵 Santōhei) or Recruits (新兵 Shinpei)

 * Florence - Before his kidnapping, Florence was a new and physically weak Marine.
 * Rain - During one of the ending scenes focusing on her, Rain was mentioned to be a "Marine recruit". However, it should be noted that she was only 12 years old at the time and wasn't actually seeing combat, instead spending all of her time training. She was promoted to Lieutenant by the age of 16.

Chore Boys (雑用 Zatsuyō) (Unofficial rank)

 * Unknown

Unknown Rank

 * Alpha Marine - A Marine who awakened Observation Haki, part of Commander Bait's platoon.
 * Bjorn - Ragnar's Marine alias when the Crew infiltrates G4.
 * Carl - Verona's Marine alias when the Crew infiltrates G4.
 * Drunk Marine - A Marine who works on Layered Sand Island and hates Clowns.
 * Lawrence - Marine with a pistol who pierced Duros' armor.
 * Lil' Jenkins - The nervous Marine who held Pearl hostage at the beginning of Episode 1.
 * Mailman Marine Ahh Ahh - A Marine who delivered mail to Captain Marrow's father.
 * Unnamed Begging Marine - Unnamed Marine who begs the crew to not kill him.
 * Unnamed Cautious Marine - A Marine on Clown Island, seems to greatly fear Captain Verona.
 * Unnamed Guarding Marines - Unnamed Marines who guard the gate of G4.
 * Wulf - Duros' Marine alias when the Crew infiltrates G4.
 * Mime Marine - A Mime who was also a Marine who Verona thought knew something about the Viridian Incident, currently deceased

Marine Locations
A list of known Marine Branches and Bases in the story

Branches

 * Unknown Branch - In the Tarako Kingdom, in South Blue.
 * Unknown Branch - On Clown Island, in Paradise.

Bases

 * G-4 - In Paradise, a week from L'Arbor, a few days from Clown Island. It used to be under the command of Vice-Admiral Arzen
 * Unknown Base - Where Trevor was being disciplined by Jefferson.

Trivia

 * Cyril is the lowest ranking Marine to eat a Devil Fruit, as the lowest known allowed is a Commander Rank.
 * The lowest rank of a Marine to rule a Branch is a Commander.
 * The ideals of "Absolute Justice" are the most common in the main storyline.
 * Disregarding canon characters, the rank with the most named characters holding it is by far the "Captain" rank, with a total of 6 legitimate holders and one imposter so far. This is followed by the "Lieutenant" rank, with 2 legitimate holders and 1 imposter.