In more prestigious games, about 5. But in junior games there are sometimes around 1-5 players for reserve According to IFNA 2009 rule book, however, there is no limit to number of substitutes as long as they are among the players list for that game.
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.