Was there a Dalek Civil War that we never got to see?

There are lots of tidbits in Doctor Who's expanded media that shed some light on the eventual fate of the New Dalek Paradigm, as it was never explicitly confirmed on-screen what became of these colourful Daleks. There is even evidence to suggest that a civil war took place between Paradigm Daleks and Bronze Daleks, but is there any truth to this?
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