Yes, you can have a different MarkerClusterer for different types of markers. My map has seven different MarkerClusterer instances (I actually use: MarkerClustererPlus ) managing different marker types, with different icons as you describe.
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.