The six major extermination camps were in Nazi-occupied Poland. There was also one in Belarus, which was also under Nazi occupation from 1941-1944 When the Nazis invaded the Soviet Union in June 1941, mobile killing squads followed and slaughtered Jews behind the lines in Lithuania, Latvia, Belarus, Ukraine and Russia.
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.