There is an example of flashback in Fahrenheit 451 when Guy Montag remembers the day he met Professor Faber in the park. He recalls how strangely he acted before and after their encounter. He also remembers how Faber gave him his name and address on a slip of paper while telling Guy that he could turn him in if he wanted.
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.