This simulation helps students understand the complexities of international relations between the World Wars, and the factors that contributed to the failure of peacekeeping efforts. Your students will negotiate international alliances, and respond to the Italian invasion of Ethiopia. It's a great introduction to a unit on World War Two!
The download includes information for students and a Powerpoint that walks you through the process of running the simulation. All you need is a map of interwar Europe! I recommend this one: http://www.worldwar1.com/roads/jpg/roads_europe1918.jpg