"Illusions" (幻術, Maboroshi) is chapter 401 of the original Naruto manga.
Summary
Sasuke tries to refute Madara's story. He points out that Itachi tried to take his eyes and kill him, but Madara responds that it was only to draw out Orochimaru and remove his influence from Sasuke. He instead pins blame on Madara for the Nine-Tailed Demon Fox's attack, thereby causing the Uchiha's demise. Madara claims he was not involved and that the fox's attack was a freak accident. Sasuke switches back to Itachi's actions, the actions of a criminal. The only proof that Madara can provide for Itachi's good intentions is that Sasuke is still alive. Accepting that Itachi orchestrated his own death, prolonging his life in the face of a fatal illness to make sure he could be killed by Sasuke, Sasuke reminisces about his brother.