Depends on whether or not you believe in karma - if you do, yes, you will be punished. If you don’t, no, you won’t. No one here can grant you forgiveness, if that’s what you are asking.
After that it depends on whether or not the dog actually suffered - I wasn’t there, and you seem to believe he did. So he lived outside for four years. And then what happened to him?
You are telling half a story.
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.