This concept should work (although I have not tested these queries).
The basic way to do this is to create a table with all the times that should exist, and then left join against that. Then your missing values become nulls, which you can use COALESCE to fill with defaults.
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.