I suggest you read "Thus we Frustrate Charlemagne ". Or "The Red Queens Race" They are both Science fiction and both involve attempts to change the past. Theoretically it is possible to build a time machine, the caveat being you can go forward as far as you want but can only return to a time that occurred after the time machine was built.
The second Caveat is it would require energy close to that emitted by a supernova. Changing one bad thing in the past may actually make things worse (not that we could ever know). Stop the bombing of Hiroshima and Nagasaki , save a few hundred thousand lives .
Seeing the devastation of those two cities gave the world a respect and fear of those weapons. Without that respect and fear we may have had an all out nuclear war and we would (if we were still around ) be having this discussion on clay tablets.
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.