The Davy Back Fight, sometimes known as the Longland Arc, is a mini-story focusing around a fictional contest between pirates in the manga and anime One Piece. It is also the setting of the fight between Admiral Aokiji and Luffy.

The Davy Back Fight

After the Skypiea arc, Monkey D. Luffy and his crew arrive at the island of Long Ring Long Land, a bizarre world where everything including animals and plants stretches in length or height. Despite the warning of Nami, Chopper, Usopp and Luffy go exploring and find an unoccupied house, a tall horse and two "walking" culms of bamboo. They break the bamboo and Tonjit plumets down, who lived on these stilts for 10 years. He is delighted that his horse, Shelley, waited for him so long although his folk are nomads and left the place years ago. He also tells the Strawhats the geography of Longring Longland, which consist of ten islands that are connected and can be walked between on foot during a big ebb every year. Tonjits tribe changes the island every three years. He takes Shelley for a ride.

In the meantime, the Going Merry and the rest of the crew is surrounded by an unnamed pirate crew, stating that their Captain wants to play Davy Back Fight with Luffy. Back at Tonjits house, Chopper, Usopp and Luffy watch Tonjit riding Shelley just to see her getting shot by Foxy the Silver Fox, who asks Luffy to play Davy Back Fight. In the Davy Back Fight, members of each pirate crew face off in different events in which the winner of the event can steal crew members of the losing team, even the captain. The Jolly Roger can also be taken and with it the dignity of the crew.

Foxy tricks Luffy who is angry for the unprovoked attack at Shelley and unknowingly accepts.

Basic Rules Of The Davy Back Fight

The contestants for each event are chosen by the captains before the game begins and the contestants cannot be changed. Since the line-ups cannot be changed, the winning team can steal a crew member that is competing in the next event to give their team an advantage.

If a crew member is lost in one event, they can be won back in the next event, but not in future Davy Back Fights after the current one is over unless the captains of both crews involved agree to another Davy Back competition.

All crew members that are won must immediately swear permanent alligance to their new captain.

Any form of cheating is allowed during the contests, and players may use any special abilities or Devil Fruit powers to give them an advantage.

When Luffy's crew play against Foxy's crew, they play a best two-out-of-three game. The events that are played are Donut Race, Groggy Ring, and Combat.

Donut Race

In this event, three members of each crew must build a make-shift boat out of nothing but three barrels and two oars. Each team then races around the island, trying to avoid obstacles and enemy cheating in order to make it to the finish line first. Each team is given a type of Log Pose called an Eternal Pose so that they can find their way back to the island if they get too far away from the shore.

Groggy Ring

In this event, the teams of three from each pirate crew choose one of their members to be the 'Ball', and they other team has to try and knock the opposing team's ball into the goal once. This event forbids the use of weapons, as it is a sport, though other kinds of cheating are allowed. Zoro and Sanji take on a team of 3 known as the Groggy Monsters. Chopper was to participate, but Foxy won him in the previous game.

Combat

This event is a duel between the two captains. A wheel is spun to randomly determine the fighting area, and the goal is to knock the opposing captain out of the fighting area. When Luffy and Foxy fight in this competition, the battle takes place on Foxy's ship, which is full of traps and weapons to give him the advantage.

Anime Filler

The anime did the arc a little differently then what was prescribed in the manga by Oda. Three more games, A Roller Race, Pirate Dodgeball and Red Light/Green Light, were added after the Groggy Ring event to legthen the storyline (presumably so Oda could get further ahead in the Water 7 arc).
The Roller Race replaced th Combat as the finale of the original game. Foxy then offers the opportunity to have another three coin game, which Luffy foolishly accepts. Pirae Dodgeball and Red Light/Green Light both end in a loss for the Straw Hats, mainly due to their own fault (Luffy eats the dodge ball, causing him to be disqualified, and Zoro kicked the opponent into the tagger), causing them to loose both Tony Tony Chopper and Nico Robin, before the final showdown between Luffy and Foxy in the Combat portion of the Davy Back Fight.

The Encounter with Aokiji

After Luffy has beaten up Foxy and took their flag (replacing it with one of his "drawings"), it is revealed that he only fought for Tonjit and Shelley. Back at the house they run into a very tall and thin guy who is sleeping while standing in front of the house. After removing his sleeping mask, Robin is shocked as the guy turns out to be Aokiji, one of the three Admirals of the Navy.

In the Anime, Aokiji is encountered by the Strawhats on the visit to the next island. The crew encounters shipwrecked people who's boat was destroyed by Yokozuna (doing the backstroke). Aokiji is agianst a tree, sleeping when encountered instead of Tonjit's house.

Aokiji states that he is privately on the island, doesn't seek a confrontation and only wanted to see where Robin ended up after leaving Alabasta. After that he helps out Tonjit to get to his tribe by freezing the path to the next island with the power of the hie-hie devil fruit he possesses (he instead helps out the shipwrecked passangers to leave to a gourmet island). After Tonjit leaves, Aokiji confronts the crew as he see's them a threat for the world. The biggest threat he see's in Robin for her ability to read the Poneglyph and tells the crew that every organisation Robin belonged to doesn't exist anymore and she is the only survivor each time.

Robin attacks Aokiji, but fails and Aokiji tries to retaliate with a strike from a sword he instantly made by freezing grass. Zoro blocks the strike and Sanji kicks the sword away, but both get cought by Aokiji freezing Sanji's leg and Zoro's arm. Luffy tries a punch, but only gets his fist frozen on Aokiji's body. Aokiji freezes down Robin and tries to shatter her with a punch, but Luffy saves her. When Aokiji tries to stomp her, Usopp grabs her from Luffy's arms and runs to the ship along with Nami and Chopper to defreeze her. Luffy sends Zoro and Sanji after them.

Luffy battles Aokiji but only ends up being entirely frozen. Aokiji spares Luffy but wonders if Luffy only wanted to buy time for the others or really thought he could beat him. However he doesn't pursue the Going Merry stating that the crew will be destroyed by Robin sooner or later anyway. Luffy is later found by the rest of the crew and is, like Robin, defrosted. The Crew continues their journey three days later.