How do i split my 10,000 word dissertation on reasons for gypsy holocaust into 3chapters?

I am looking at the reasons for the persecution and why the gypsies are not recognised as victims as they should be.How do i split my 10,000 word dissertation on reasons for gypsy holocaust into 3chapters?
By the sense I guess?How do i split my 10,000 word dissertation on reasons for gypsy holocaust into 3chapters?
Why does it have to be in 3 chapters? I don't see how this question can be answered without looking in detail at your thesis.