Technical writing is usually about how to do something, or how something works. An instruction manual about how to make a light bulb is an example of technical writing Expository writing "explains" something. A book about how the light bulb was invented is an example of expository writing.
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.