Is it acceptable for a writer to jump back in time for a whole chapter?
I don't mean a flashback, I mean more like, for example, chapter 5 happening in 25/06/2014 and then the next (Chapter 6) happening in 24/06/2014? I would be using this to explain how certain thing came to pass, example, army 1 is fighting army 2 and currently losing, and then all of the sudden army 3 arrives and saves the day, but noone knows how or why army 3 arrived, so in the next chapter I go back in time to explain how army 3 got there.
And sometimes I would go even further back, example, chapter 7 being in 26/06/2014 and then chapter 8 in 12/09/1932, because something happened in 1932 that is now going to affect events in 2014 heavily.
Would this be an acceptable thing to do? And if the books kept jumping in time every chapter (of course stating the date at the beggining) Would it still be acceptable?