@ User:Nick-D, the length is irrelevant, plus, Kershaw mentions Hitler's involvement in enlisting in the Bavarian army over a couple of pages in the book. 
 
 :"it's already on that article, I've just checked." I know, that's why I wrote "There's already a brief mention of the issue there, but it could be expanded." We don't know it was an "error" as such. Perhaps they did check. Perhaps Hitler told them and they said it didn't matter. Neither Kershaw nor the 1924 report express certainty.