I'm assuming that once you've been approved it's just like any other AdSense account.
If it is, then you can simply use 1 account for ALL your sites.
Yes when approved it can be used in multiple place.
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.