Essays / 'Hitler's War' Essay - description of World War II. [3]

Hello guys!
I hope I'm posting this in the right place, but I'm looking for some help here.
I have to write an essay on the term Hitler's War, but I'm not sure if I've correctly interpreted the essay question.

The question is; " 'Hitler's War'. Why has this description of World War II provoked considerable debate amongst historians?"

I'd love to hear others interpretations because I could honestly use the help!
Thank you in advance!