The reason your existing code doesn't work is because you're modifying the value within the array, not reassigning entire array itself to the property. Therefore you won't be firing a property change event.
You could use an ObservableCollection instead of the array, to do all the plumbing for you.
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.