This may be a bug in pandoc; you should report on pandoc's github issue tracker.
Pandoc is concatenating the input files into one document first. This creates duplicate #names because they are now all in one file. This explains why the links are all jumping to the first project's bookmarks.
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.