It has to be 15,000 pages thought the abstract and the introduction have already

It has to be 15,000 pages thought the abstract and the introduction have already been done

So that will drop it to maybe 11000 to 12,000 words
IS it possible to be receiving every chapter from the writer as he writes them ?
Instructions are: My suggestion is that you simplify your research question and use this to guide the structure of your dissertation. Rather than looking at various stages of US military presence in Afghanistan, focus on one overarching question.

Has the US invasion of Afghanistan been successful?

This question allows you to frame the discussion in a much clear and more straightforward manner. You can start by explaining the reasons why the US argued that invasion was necessary, and then evaluate the extent to which the occupation has solved these problems. By structuring the dissertation in this way, you are giving yourself a direct question to answer.

I would also suggest some theoretical framing. The invasion was driven by neoconservative theory. In particular, the idea that US domestic security is undermined by hostile regimes. The neoconservative solution to this is regime change – using military intervention to install a new government that is allied to the US. It would be interesting to use this framework as the basis of evaluating the success of the US invasion of Afghanistan.