Basically the amount of agents/wizzies you have, the amount of agents/wizzies your opponent has and both your NW's. Also with magic both the magic race bonuses count. When you op/spell someone with a bigger NW than you it will be about sheer number of agents/wizzies.
When you op/spell someone with a lower NW than you it will be about amount of agents/wizzies per NW. Also note that with both the actions there's a probability factor as well. So even if you have a lot more wizzies/agents than your opponent you can still fail due to bad luck!
More.
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.