Chapter 550

Chapter 550 is called "Marine Headquarters".

Coverstory Summary
Usopp has a feast with Heracles on the Boin Archipelago.

Chapter Notes

 * Along with 100,000 elite troops there are 5 Shichibukai, 3 Admirals and Fleet Admiral Sengoku guarding Portgas D. Ace
 * Admiral Akainu is revealed.
 * Luffy and his escape crew arrive at the Gates of Justice that lead to Marineford.
 * Ace's mother's name is Portgas D. Rouge and his father was the Pirate King Gol D. Roger.
 * She kept the secret from the Marines by bearing Ace in her womb for 20 months thus fooling their search. She died in childbirth.

Characters

 * Straw Hat Pirates
 * Usopp
 * Monkey D. Luffy
 * Whitebeard Pirates
 * Portgas D. Ace
 * Marines
 * Fleet Admiral Sengoku
 * Admiral Aokiji
 * Admiral Kizaru
 * Admiral Akainu
 * Vice-Admiral John Giant
 * Vice-Admiral Monkey D. Garp
 * Vice-Admiral Momonga
 * Vice-Admiral Tsuru
 * Smoker
 * Tashigi
 * Coby
 * Helmeppo
 * Hina
 * Shichibukai
 * Gecko Moria
 * Bartholomew Kuma
 * Juracule Mihawk
 * Boa Hancock
 * Donquixote Doflamingo
 * Jinbei
 * Baroque Works (disbanded)
 * Mr. 3
 * Buggy
 * Portgas D. Rouge (shadowed)
 * Gol D. Roger (via flashback)