I think the problem is with the nested grid elements that you're using in your DataTemplate . You can simplify the visual tree and achieve the desired results by using a single Grid that has the column and row definitions and then use the Grid. ColumnSpan and Grid.
RowSpan attached properties as shown in the following XAML.
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.