Nobody Genocide as a legal concept was new and was not used in the postwar trials The Germans' collectively were never charged with anything, as the Allies rejected collective guilt as a legal concept In trials of individuals, other charges were used.
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.