So all you're doing at the moment is embedding a Google Map into your web page. Instead what you need to do is use the Google Maps API to add the Google Map directly to your page instead, i.e. Not using your customised map.
You then have to add all the markers you need, to include the markerclusterer JS file, and to initialise the markerClusterer.
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.