To me it looks like, that all overloads of async_read_until() takes 2 arguments. You pass a function with 3 arguments. Likely you want to pass the stream as extra parameter, bind it to the function to get a function with 2 arguments.
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.