Je suis encore à Paris demain" means "I am still in Paris tomorrow". The phrase "en Paris" in your question is a mistake. The preposition "en" is used mainly in front of feminine country names.
In front of cities, you always use "à".
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.