Unfortunately, you can't right now. You can stockpile your food or send your troops to an alliance-mate to watch over while you are away. There is a big push to have a vacation-mode though.
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.