Well, I found a solution. It took a lot of experimentation, and I think a good bit of blind luck, but here it is.
You should have used Postgres, lol. A simple query like this should not take more than some tens of seconds provided you have enough RAM to avoid disk thrashing.
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.