Thanks for the link, I'll look at it later when I have some time. The reason I am advocating the possibility is that we can not declare on them anyway as the game is set up so that we're peacefully linked. So we may as well use that to our advantage if we can. EDIT - Here is what the Civlopedia says about Permanent Alliances: Your two civilizations essentially become one nation with two leaders. You each continue to have control over your units and cities, but you share everything else: resources, technologies, maps and victory or defeat. If one declares war, the other auromatically does so as well. If one signs a treaty, the others are bound by it. Permanent Alliances are enabled by researching either Communism or Fascism.