It is beneath the sea an is called a ocean crust. This is the thinnest point because the ocean water is so dense (heavy) it flattens the crust (because there's millions and millions of gallons of water...... That's heavy! ) that's why there are oil rigs at sea because it's only around 5 kilometres thick, unlike on land it's around 50 kilometres thick!
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.