No it is not illegal to view a document entrusted to you that is not concealed. If you did see this information and even remembered it, I do not believe there is anything you would be able to do with it. If you altered the check that would be a crime of check fraud.
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.