You can only have one application per site. This means you'll need.
You can register one App Engine application ID and have each subdirectory do different things. For example, have all URLs under /app1 do one thing, and all URLs under /app2 do another thing.
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.