Looking at the docs, . Replace calls a method that takes a fragment as a parameter. So I would guess that it is only meant to replace one fragment.
I don't really understand why you would add two fragments to the same id in the first place.
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.