What you're looking for is the class called WP_Query has got a detailed explanation in the Codex. Take a look at the post_type argument which accepts an array, thus you can give it a array( 'post', 'page' ) or any other post types that you want to fetch.
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.