Try using http://mapbox.com which has both an iOS SDK and an app for constructing offline maps.
Check section 10.3 of the Google Maps Terms of Service and you'll find that you're not allowed to store any Google Maps content. That means that you'll need to provide not only your own map, but also replace the handy MapKit functionality. You really can't use MapKit at all for offline applications, as far as I can tell.
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.