Candidates are strongly encouraged to include in their application: 1) a description of the mentor's research describing how it relates to his or her proposed research and career development plans, and 2) details of potential overlap and synergism. It is reassuring to reviewers if this issue is addressed directly in a letter from the mentor. More.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.