Which katana fighting style is best known for killing?

No this was not self defense you attacked her AFTER she hit you out of anger self defense is when someone is trying to hurt you and you hurt them first to protect yourself.

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.