!! Short Summary
A filler arc that takes place after the ''[[Recap/OnePieceSkypieaArc Skypiea Arc]]''. The Straw Hats accidentally float down into the Marine base, G-8, after their adventure in Skypiea. Forced to abandon ship, the crew must make their way through the base to reclaim the Going Merry and avoid capture. But its not gonna be easy as the captain of the base, Jonathan, is a protege of one of the Marine Admirals, Akainu, and able to track their every move.

!! Main Summary

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''G-8'' arc has the following tropes:

* AchievementsInIgnorance: Zoro managed to get the crew lost ''in a straight hallway'' and thus avoided the ambush the Marines had set for them.
* AintTooProudToBeg: A variant, during the group's time undercover in the base. Sanji meets Jessica, the head chef, and shows her a recipe for a tasty dish. But when he's revealed as a pirate and later escapes. Jessica tries to throw the recipe away. Her whole staff beg her to swallow her pride and let them use it since they like his cooking. Jessica grudgingly agrees and they use the recipe.
* AntiVillain: Jonathan only wants to defend his base from invaders (and of course perform his duty as a marine to capture wanted pirates,) and proves to be a very amiable person who treats the Straw Hats as [[WorthyOpponent Worthy Opponents.]]
* CameFromTheSky: The Going Merry had fallen from the sky and into the heavily guarded Marine base, leaving the Marines wondering how the Straw Hats managed to infiltrate them. When interrogated, Zoro [[SarcasticConfession honestly told them]] that they had came from the sky.
** This even doubles as a BrickJoke as Mekao had seen this happen and told some of the Marines, [[CassandraTruth but wasn't believed]]. When the Straw Hats manage to escape via the octopus balloon and take off into the air, essentially leaving the way they came in, he promptly tells them "IToldYouSo".
* TheCameo: Commander Jonathan shows up later in the Marineford Arc.
* ChekhovsGun: The octopus balloon they received from Skypiea.
* TheChessmaster: Jonathan is quite good with coming up strategies, even some on the fly.
* {{Foreshadowing}}: Usopp is told by a kindly engineer that the Merry has gotten too many dings during its journey and needs a proper shipwright. During a regroup in one of the unused ports, the crew agree the money they gained should be used in repairing the ship and that they need a shipwright.
** Said engineer, Mekao, also seemed to know about the [[spoiler: Klabautermann, which foreshadowed the Going Merry's death]]. He is pulled away before revealing this, however, in order for Franky to give Usopp this information later.
* FacePalm: Jonathan does this after Shepherd unleashes a cannon on the base ''itself'' in an effort to destroy the Straw Hats.
* [[spoiler: HappilyMarried: Jonathan, the base commander, and Jessica, the head cook]]
* HotBlooded: The Hot Wind Marine corps.
* HumiliationConga: Poor Shepherd.
* IdentityAmnesia: Usopp invokes this on Shepherd, who Robin was impersonating at the time and the guards had mistaken him for one of the Straw Hats. Usopp plays this out by acting shocked that his friend "Condoriano" cannot recognize him and must have hit his head, hence why he kept claiming he was someone he wasn't.
* NiceJobFixingItVillain: Shepherd, whose attempts to capture the Straw Hats himself only ends up aiding them.
* SarcasticConfession: When a captured Zoro is being interrogated by the Marines on how he managed to sneak into their well-defended fortress, he tells them that his ship had fallen from the sky.
* SoundOff: The Hot Wind Marines sing one even when engaging the enemy.
-->''We are Navarone's combat corps!~''
-->''Let them feel the hot wind of our souls!~''
* SupremeChef: The Navarone cooks are REALLY good at what they do, but Sanji takes the cake here. He prepares a meal to put a kitchen full of professional cooks to shame...using the ingredients said cooks ''threw away''
* {{Troll}}: Luffy messes with one Marine for the fun of it. Usopp also had some fun messing with Shepherd, as seen above.
* TheUnfought: Despite being the "BigBad" of the arc, Luffy never really fights with Jonathan. In fact, the main struggle is overcoming his traps to get out of the base.
* WoundedGazelleGambit: Nami while dressed as a nurse pretends that the "invading pirates" had attacked her and threw off suspicion from her.