This depends on the cruise you choose. A repositioning cruise brings you from point A to point B and you need to make arrangements to get home again. Many Mediterranean cruises are one way cruises.
However, most cruises begin and end at the same port.
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.