Arc 2The Uchiha-Senju War
Uchiha Gen strengthened the Uchiha through research and preparation, but a coalition attack devastated the clan and killed Haru. After Madara and Hashirama agreed to unite their clans, Izuna died from his wounds, and Gen set out to settle matters with Tobirama.
- Uchiha Gen built up the clan, developed its academy and businesses, and began experiments to fuse bloodlines after rescuing five captives from a slave market.
- Gen collected chakra samples from Shukaku and the Nine-Tails, then discovered that his experiments had fused Uzumaki and Yuki genes and given him Ice Release.
- A coalition of clans ambushed the Uchiha, killed Haru, and left thousands of Uchiha dead before Gen helped drive off the attackers and defeat the coalition.
- Gen investigated Uchiha Chiri’s new dōjutsu while Madara and Hashirama secretly discussed uniting their clans after the devastating war.
- Madara led the Uchiha into battle against the Senju, and Hashirama and Madara fought before agreeing to an alliance.
- Tobirama mortally wounded Izuna, who agreed to be revived decades later and gave Madara permission to take his eyes.
- Madara transplanted Izuna’s eyes and awakened the Eternal Mangekyō Sharingan, while Gen prepared to fight Tobirama without disrupting the clans’ union.
- Gen left to meet Madara and Hashirama, challenged Hashirama’s vision of peace, and set out to fight Tobirama to the death.