You have declared two sets of arrays. Two named arr1 and two named arr2 . These have some data added to them, but then they go out of scope and the data is not used.
That is the source of the warnings.
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.