To append the value of a variable to a string you need not echo the variable.
Bolt is right. Often concat issue has to do with a confusion of mixed in code, literals, and closing quotes/double-quotes. Try to use heredoc instead to clean up your code-block.
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.