Where you decide to get the tattoo, really depends on how large you would like the letters to be and how often you would like to be reminded of it. The back is a common place to get a long-phrased tattoo, though it can be painful to have to lean against that area while the tatt is healing. You could also have the tattoo done on your arm, would would heal with less pain and remind you of your decision.
If you got very small letters, you could have it done on the back of your neck.
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.