Arc 18The World Alliance War
As the coming flood drove nations toward war, Roy built alliances and prepared the East Blue while the World Alliance Army advanced against the World Government. The arc ended with the East Blue mobilizing for conquest and Black Sun nearing completion.
- Roy showed Garp the East Blue’s algae factories as the Five Elders pursued Blackbeard’s group after its failed theft of the National Treasure.
- Buggy and Mihawk conquered the Flower Country, and Buggy announced his plan to unite West Blue and save its people from the coming catastrophe.
- The North Blue Freedom Revolutionary Alliance called for a World Alliance Army to seize Mary Geoise, and Roy sent East Blue forces to support it and search for the final red Poneglyph.
- The World Alliance Army captured G-8 Fortress with Kuzan’s help as rebellions and defections weakened the World Government.
- Roy asked Sengoku and Tsuru to join his alliance, while Pluton emerged from Wano Country and Roy revealed his plan to break apart the Red Line and unite the oceans.
- Roy disclosed that he possessed Poseidon as well as Pluton, and he prepared Shirahoshi and his forces to develop the Red Line and Calm Belt.
- Caesar Clown’s scientists calibrated Black Sun’s power engines and prepared the weapon for completion and flight.
- Roy sealed the East Blue from outside news, divided it into ten military districts, and ordered mass training and food production as the region prepared to conquer the world.