Yeah its about as reliable as the anime for anwsers. I do as well but still there is more than one version of how things happen. Even in the manga, and the manga conflicts with the anime and itself at times.They did have a flashback, but that wasn't Madara's first attack.
Um I don't need to read through 8000 pages for an answer. I remember certain things from this chapter or that chapter, not everything is bright. But I ain't an idiot who needs a thread to answer his questions when he can just read the manga.
Is there something wrong with Naruto wikia?
Look at when orochimaru used IWR against the 3rd hokage, in the manga it never showed the third casket, but it did in the anime, and then in Kabutos expilination of why his 3rd summon failed, it shows the casket full of shuriken.