He probably came to visit you and let you know he is still around and still your dad and has come to your dream to reassure you that he is still very much aware of you and loves you and is waiting on the other side for the time we are united with loved ones that have passed away.
You miss him. As far as an interpretation: He may be gone, but he's still your father and still checking to make sure you're ok.
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.