Sasuke arrived at the Uchiha Hideout, and confronted Itachi. The battle began with both of them seemingly using taijutsu, soon ending with Sasuke cornering Itachi and deciding to ask him one last question before killing him off. Sasuke asked, "Who is he?" Sasuke recalled when Itachi had said that three of the Uchiha clan would have the ability to use the Mangekyō Sharingan, including himself, if Sasuke would be able to awaken his. Itachi explained that the person who had assisted him when he murdered the entire clan was none other than Madara Uchiha, one of the founders of Konoha, and revealed that one of the purposes of the Mangekyō Sharingan was to control the Nine-Tailed Demon Fox which he had done 16 years ago when it attacked Konoha. He also revealed that, once the Mangekyō Sharingan