The Great War Breaks Out! (大戦、開戦!, Taisen, Kaisen!) is chapter 515 of the Naruto manga.
Ōnoki escorts the Island Turtle to Kumogakure. Killer Bee begins teaching Naruto how to control a tailed beast's chakra. Sasuke wonders if its okay to take the bandages off his, and Zetsu tells him to ne patient. The Allied Shinobi Forces discover the amount of troops Akatsuki's army has, and they begin making counter-measures. Kabuto reveals the rest of his revived servants.