The page limits for the Research Plan are the same as for the original (parent) grant. For R01s, that is 25 pages, for R21s, 15 pages, and for R03s, it is 10 pages. However, there is no need to use all the pages allowed, and it is expected that most competitive revision applications will use fewer than the maximum allotment.
The page limit for the required introduction is one page for all applications. 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.