Yes. For example: "What's the most populous city of the USA?" "New York City is." It'd probably classify as an example of ellipsis (in the linguistic sense http://en.wikipedia.org/wiki/Ellipsis_%2... ) - a sentence that remains, by convention, grammatically correct after the omission of implied elements (in this case, ""New York City is the most populous city of the USA").
It's also a deictic sentence: one whose meaning depends on external context (se Deixis http://en.wikipedia.org/wiki/Deixis ).
New York City is" is not a complete sentence. As far as it goes, that combination of four words is grammatical. But that is not to guarantee that you will make a grammatically correct sentence when you add more words.
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.