Quote Originally Posted by Koyuki
My theory is that Madara and Shodaime was friends. Much like Naruto and Sasuke.

In the Naruto vs Sasuke arc Kakashi metion that their lives are remarkably like theirs (Madara and Shodaime). You can find the pictures of Valley of End in chapter 218 and 233. I think those are the best.

Madara betrayed Shodaime, and I think it's why fought.

i never once read or saw kakashi say anything about Madara .. what excatly is the chapter of when he mention it Koyuki just for clarity ????