DNA testing is one of the most accurate tests available. If there is enough of a sample then a positive match can be made. If the sample is too small then it may not be enough to get a match, but it will never show up as someone else's DNA.
You can find more information here: healthanddna.com/dna-learning/faq-patern....
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.