It's not possible to post on the user's wall as app or page. And even if it's possible, it's not recommended!
That's why your posts are created by that user. You have to authorize the app with user name who has access to the page admin section.
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.