These are a really great questions! I'm a professional OpenLayers developer and fan, so I'll address your questions from that perspective.
It's not necessarily a question of OpenLayers OR Google Maps. You can after all use Google Maps for your map background in OpenLayers. Some more specific answers.
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.