Start with things you like or have done or even your nickname if you have one. For example are you passionate about Camaroes? Then a wicked black Camaro driving up your arm would be cool.
Do you fish? Then a tattoo of crossed fishing poles framing a large fish jumping out of the water Love Star Wars...well you have endless possibilities Be creative and don't be afraid to mix ideas.
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.