I thought that the whole idea of the Peacemaker game is really cool. Especially the fact that it uses actual real life events that happened.  A couple things I would say need more improving is in the beginning it should explain the rules/objectives of the game more and what everything on the map represents.  Also, I think it should explain what leader you are, where you are, and when this is all taking place so you can decide your next move based on that.